def azimuth_y(self, reductionFactor=1):
"""Calculate the angle of each pixel position vector with respect to
the Y-axis (azimuth).
In general, azimuth is the angle from a reference vector (e.g., the
direction to North) to the chosen position vector. The azimuth
increases clockwise from direction to North.
http://en.wikipedia.org/wiki/Azimuth
Parameters
-----------
reductionFactor : integer
factor by which the size of the output array is reduced
Returns
-------
azimuth : numpy array
Values of azimuth in degrees in range 0 - 360
"""
lon_grd, lat_grd = self.get_geolocation_grids(reductionFactor)
a = initial_bearing(lon_grd[1:, :], lat_grd[1:, :], lon_grd[:-1:, :], lat_grd[:-1:, :])
# Repeat last row once to match size of lon-lat grids
a = np.vstack((a, a[-1, :]))
return a
def azimuth_y(self, reductionFactor=1):
'''Calculate the angle of each pixel position vector with respect to
the Y-axis (azimuth).
In general, azimuth is the angle from a reference vector (e.g., the
direction to North) to the chosen position vector. The azimuth
increases clockwise from direction to North.
http://en.wikipedia.org/wiki/Azimuth
Parameters
-----------
reductionFactor : integer
factor by which the size of the output array is reduced
Returns
-------
azimuth : numpy array
Values of azimuth in degrees in range 0 - 360
'''
lon, lat = self.get_geolocation_grids(reductionFactor)
a = initial_bearing(lon[1:, :], lat[1:, :], lon[:-1:, :], lat[:-1:, :])
# Repeat last row once to match size of lon-lat grids
a = np.vstack((a, a[-1, :]))
return a
def azimuth_y(self, reductionFactor=1):
'''Calculate the azimuth of 'upward' direction in each pixel
Generaly speaking, azimuth is angle from the reference vector
(direction to North) to the chosen direction. Azimuth increases
clockwise from direction to North. http://en.wikipedia.org/wiki/Azimuth
Here we calcluate azimuth of 'upward' direction.
'Upward' direction coincides with Y-axis direction (and hence is
opposite to the ROW-axis direction). For lon-lat (cylindrical,
Plate Caree) and Mercator projections 'upward' direction coincides with
direction to North, hence azimuth is 0.
Parameters
-----------
reductionFactor : integer
factor by which the size of the output array is reduced
Returns
-------
azimuth : numpy array
Values of azimuth in degrees in range 0 - 360
'''
lon, lat = self.get_geolocation_grids(reductionFactor)
a = initial_bearing(lon[1:, :], lat[1:, :], lon[:-1:, :], lat[:-1:, :])
# Repeat last row once to match size of lon-lat grids
a = np.vstack((a, a[-1, :]))
return a
def azimuth_y(self, reductionFactor=1):
'''Calculate the azimuth of 'upward' direction in each pixel
Generaly speaking, azimuth is angle from the reference vector
(direction to North) to the chosen direction. Azimuth increases
clockwise from direction to North. http://en.wikipedia.org/wiki/Azimuth
Here we calcluate azimuth of 'upward' direction.
'Upward' direction coincides with Y-axis direction (and hence is
opposite to the ROW-axis direction). For lon-lat (cylindrical,
Plate Caree) and Mercator projections 'upward' direction coincides with
direction to North, hence azimuth is 0.
Parameters
-----------
reductionFactor : integer
factor by which the size of the output array is reduced
Returns
-------
azimuth : numpy array
Values of azimuth in degrees in range 0 - 360
'''
lon, lat = self.get_geolocation_grids(reductionFactor)
a = initial_bearing(lon[1:, :], lat[1:, :],
lon[:-1:, :], lat[:-1:, :])
# Repeat last row once to match size of lon-lat grids
a = np.vstack((a, a[-1, :]))
return a
def add_look_direction_band(self):
lon, lat = self.get_full_size_GCPs()
"""
TODO: Also in mapper_sentinel1_l1.py... Use this code there..
"""
sat_heading = initial_bearing(lon[:-1, :], lat[:-1, :], lon[1:, :],
lat[1:, :])
look_direction = scipy.ndimage.interpolation.zoom(
np.mod(sat_heading + 90, 360),
(np.shape(lon)[0] / (np.shape(lon)[0] - 1.), 1))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT.from_array(look_direction_u)
look_v_VRT = VRT.from_array(look_direction_v)
lookVRT = VRT.from_lonlat(lon, lat)
lookVRT.create_band([{
'SourceFilename': look_u_VRT.filename,
'SourceBand': 1
}, {
'SourceFilename': look_v_VRT.filename,
'SourceBand': 1
}], {'PixelFunctionType': 'UVToDirectionTo'})
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize, 1)
# Store VRTs so that they are accessible later
self.band_vrts['look_u_VRT'] = look_u_VRT
self.band_vrts['look_v_VRT'] = look_v_VRT
self.band_vrts['lookVRT'] = lookVRT
src = {
'SourceFilename': self.band_vrts['lookVRT'].filename,
'SourceBand': 1
}
dst = {'wkv': 'sensor_azimuth_angle', 'name': 'look_direction'}
self.create_band(src, dst)
self.dataset.FlushCache()
""" End repetition """
def __init__(self,
filename,
gdalDataset,
gdalMetadata,
fast=False,
**kwargs):
if kwargs.get('manifestonly', False):
fast = True
NansatFutureWarning(
'manifestonly option will be deprecated. Use: fast=True')
if not os.path.split(filename.rstrip('/'))[1][:3] in ['S1A', 'S1B']:
raise WrongMapperError('%s: Not Sentinel 1A or 1B' % filename)
if not IMPORT_SCIPY:
raise NansatReadError(
'Sentinel-1 data cannot be read because scipy is not installed'
)
if zipfile.is_zipfile(filename):
zz = zipfile.PyZipFile(filename)
# Assuming the file names are consistent, the polarization
# dependent data should be sorted equally such that we can use the
# same indices consistently for all the following lists
# THIS IS NOT THE CASE...
mds_files = [
'/vsizip/%s/%s' % (filename, fn) for fn in zz.namelist()
if 'measurement/s1' in fn
]
calibration_files = [
'/vsizip/%s/%s' % (filename, fn) for fn in zz.namelist()
if 'annotation/calibration/calibration-s1' in fn
]
noise_files = [
'/vsizip/%s/%s' % (filename, fn) for fn in zz.namelist()
if 'annotation/calibration/noise-s1' in fn
]
annotation_files = [
'/vsizip/%s/%s' % (filename, fn) for fn in zz.namelist()
if 'annotation/s1' in fn
]
manifest_files = [
'/vsizip/%s/%s' % (filename, fn) for fn in zz.namelist()
if 'manifest.safe' in fn
]
zz.close()
else:
mds_files = glob.glob('%s/measurement/s1*' % filename)
calibration_files = glob.glob(
'%s/annotation/calibration/calibration-s1*' % filename)
noise_files = glob.glob('%s/annotation/calibration/noise-s1*' %
filename)
annotation_files = glob.glob('%s/annotation/s1*' % filename)
manifest_files = glob.glob('%s/manifest.safe' % filename)
if (not mds_files or not calibration_files or not noise_files
or not annotation_files or not manifest_files):
raise WrongMapperError(filename)
# convert list of MDS files into dictionary. Keys - polarizations in upper case.
mds_files = {
os.path.basename(ff).split('-')[3].upper(): ff
for ff in mds_files
}
polarizations = list(mds_files.keys())
# read annotation files
annotation_data = self.read_annotation(annotation_files)
if not fast:
annotation_data = Mapper.correct_geolocation_data(annotation_data)
# read manifest file
manifest_data = self.read_manifest_data(manifest_files[0])
# very fast constructor without any bands only with some metadata and geolocation
self._init_empty(manifest_data, annotation_data)
# skip adding bands in the fast mode and RETURN
if fast:
return
# Open data files with GDAL
gdalDatasets = {}
for pol in polarizations:
gdalDatasets[pol] = gdal.Open(mds_files[pol])
if not gdalDatasets[pol]:
raise WrongMapperError('%s: No Sentinel-1 datasets found' %
mds_files[pol])
# Check metadata to confirm it is Sentinel-1 L1
metadata = gdalDatasets[polarizations[0]].GetMetadata()
# create full size VRTs with incidenceAngle and elevationAngle
annotation_vrts = self.vrts_from_arrays(
annotation_data, ['incidenceAngle', 'elevationAngle'])
self.band_vrts.update(annotation_vrts)
# create full size VRTS with calibration LUT
calibration_names = ['sigmaNought', 'betaNought']
calibration_list_tag = 'calibrationVectorList'
for calibration_file in calibration_files:
pol = '_' + os.path.basename(calibration_file).split(
'-')[4].upper()
xml = self.read_vsi(calibration_file)
calibration_data = self.read_calibration(xml, calibration_list_tag,
calibration_names, pol)
calibration_vrts = self.vrts_from_arrays(calibration_data,
calibration_names, pol,
True, 1)
self.band_vrts.update(calibration_vrts)
# create full size VRTS with noise LUT
for noise_file in noise_files:
pol = '_' + os.path.basename(noise_file).split('-')[4].upper()
xml = self.read_vsi(noise_file)
if '<noiseVectorList' in xml:
noise_list_tag = 'noiseVectorList'
noise_name = 'noiseLut'
elif '<noiseRangeVectorList' in xml:
noise_list_tag = 'noiseRangeVectorList'
noise_name = 'noiseRangeLut'
noise_data = self.read_calibration(xml, noise_list_tag,
[noise_name], pol)
noise_vrts = self.vrts_from_arrays(noise_data, [noise_name], pol,
True, 1)
self.band_vrts.update(noise_vrts)
#### Create metaDict: dict with metadata for all bands
metaDict = []
bandNumberDict = {}
bnmax = 0
for pol in polarizations:
dsPath, dsName = os.path.split(mds_files[pol])
name = 'DN_%s' % pol
# A dictionary of band numbers is needed for the pixel function
# bands further down. This is not the best solution. It would be
# better to have a function in VRT that returns the number given a
# band name. This function exists in Nansat but could perhaps be
# moved to VRT? The existing nansat function could just call the
# VRT one...
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
band = gdalDatasets[pol].GetRasterBand(1)
dtype = band.DataType
metaDict.append({
'src': {
'SourceFilename': mds_files[pol],
'SourceBand': 1,
'DataType': dtype,
},
'dst': {
'name': name,
},
})
# add bands with metadata and corresponding values to the empty VRT
self.create_bands(metaDict)
'''
Calibration should be performed as
s0 = DN^2/sigmaNought^2,
where sigmaNought is from e.g.
annotation/calibration/calibration-s1a-iw-grd-hh-20140811t151231-20140811t151301-001894-001cc7-001.xml,
and DN is the Digital Numbers in the tiff files.
Also the noise should be subtracted.
See
https://sentinel.esa.int/web/sentinel/sentinel-1-sar-wiki/-/wiki/Sentinel%20One/Application+of+Radiometric+Calibration+LUT
The noise correction/subtraction is implemented in an independent package "sentinel1denoised"
See
https://github.com/nansencenter/sentinel1denoised
'''
# Get look direction
longitude, latitude = self.transform_points(
calibration_data['pixel'].flatten(),
calibration_data['line'].flatten())
longitude.shape = calibration_data['pixel'].shape
latitude.shape = calibration_data['pixel'].shape
sat_heading = initial_bearing(longitude[:-1, :], latitude[:-1, :],
longitude[1:, :], latitude[1:, :])
look_direction = scipy.ndimage.interpolation.zoom(
np.mod(sat_heading + 90, 360),
(np.shape(longitude)[0] / (np.shape(longitude)[0] - 1.), 1))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT.from_array(look_direction_u)
look_v_VRT = VRT.from_array(look_direction_v)
lookVRT = VRT.from_lonlat(longitude, latitude)
lookVRT.create_band([{
'SourceFilename': look_u_VRT.filename,
'SourceBand': 1
}, {
'SourceFilename': look_v_VRT.filename,
'SourceBand': 1
}], {'PixelFunctionType': 'UVToDirectionTo'})
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize, 1)
# Store VRTs so that they are accessible later
self.band_vrts['look_u_VRT'] = look_u_VRT
self.band_vrts['look_v_VRT'] = look_v_VRT
self.band_vrts['lookVRT'] = lookVRT
metaDict = []
# Add bands to full size VRT
for pol in polarizations:
name = 'sigmaNought_%s' % pol
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': (self.band_vrts[name].filename),
'SourceBand': 1
},
'dst': {
'name': name
}
})
name = 'noise_%s' % pol
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename':
self.band_vrts['%s_%s' % (noise_name, pol)].filename,
'SourceBand': 1
},
'dst': {
'name': name
}
})
name = 'look_direction'
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.band_vrts['lookVRT'].filename,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': name
}
})
for pol in polarizations:
dsPath, dsName = os.path.split(mds_files[pol])
name = 'sigma0_%s' % pol
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
metaDict.append({
'src': [{
'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_%s' % pol],
}, {
'SourceFilename':
self.band_vrts['sigmaNought_%s' % pol].filename,
'SourceBand':
1
}],
'dst': {
'wkv':
'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol,
'suffix': pol,
},
})
name = 'beta0_%s' % pol
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
metaDict.append({
'src': [{
'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_%s' % pol]
}, {
'SourceFilename':
self.band_vrts['betaNought_%s' % pol].filename,
'SourceBand':
1
}],
'dst': {
'wkv':
'surface_backwards_brightness_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol,
'suffix': pol,
},
})
self.create_bands(metaDict)
# Add incidence angle as band
name = 'incidence_angle'
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
src = {
'SourceFilename': self.band_vrts['incidenceAngle'].filename,
'SourceBand': 1
}
dst = {'wkv': 'angle_of_incidence', 'name': name}
self.create_band(src, dst)
self.dataset.FlushCache()
# Add elevation angle as band
name = 'elevation_angle'
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
src = {
'SourceFilename': self.band_vrts['elevationAngle'].filename,
'SourceBand': 1
}
dst = {'wkv': 'angle_of_elevation', 'name': name}
self.create_band(src, dst)
self.dataset.FlushCache()
# Add sigma0_VV
if 'VV' not in polarizations and 'HH' in polarizations:
name = 'sigma0_VV'
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
src = [{
'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_HH'],
}, {
'SourceFilename': (self.band_vrts['sigmaNought_HH'].filename),
'SourceBand':
1,
}, {
'SourceFilename': self.band_vrts['incidenceAngle'].filename,
'SourceBand': 1
}]
dst = {
'wkv':
'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'
}
self.create_band(src, dst)
self.dataset.FlushCache()
def __init__(self, fileName, gdalDataset, gdalMetadata, **kwargs):
''' Create Radarsat2 VRT '''
fPathName, fExt = os.path.splitext(fileName)
if zipfile.is_zipfile(fileName):
# Open zip file using VSI
fPath, fName = os.path.split(fPathName)
fileName = '/vsizip/%s/%s' % (fileName, fName)
if not 'RS' in fName[0:2]:
raise WrongMapperError('Provided data is not Radarsat-2')
gdalDataset = gdal.Open(fileName)
gdalMetadata = gdalDataset.GetMetadata()
#if it is not RADARSAT-2, return
if (not gdalMetadata
or not 'SATELLITE_IDENTIFIER' in gdalMetadata.keys()):
raise WrongMapperError
elif gdalMetadata['SATELLITE_IDENTIFIER'] != 'RADARSAT-2':
raise WrongMapperError
# read product.xml
productXmlName = os.path.join(fileName, 'product.xml')
productXml = self.read_xml(productXmlName)
# Get additional metadata from product.xml
rs2_0 = Node.create(productXml)
rs2_1 = rs2_0.node('sourceAttributes')
rs2_2 = rs2_1.node('radarParameters')
if rs2_2['antennaPointing'].lower() == 'right':
antennaPointing = 90
else:
antennaPointing = -90
rs2_3 = rs2_1.node('orbitAndAttitude').node('orbitInformation')
passDirection = rs2_3['passDirection']
# create empty VRT dataset with geolocation only
VRT.__init__(self, gdalDataset)
#define dictionary of metadata and band specific parameters
pol = []
metaDict = []
# Get the subdataset with calibrated sigma0 only
for dataset in gdalDataset.GetSubDatasets():
if dataset[1] == 'Sigma Nought calibrated':
s0dataset = gdal.Open(dataset[0])
s0datasetName = dataset[0][:]
band = s0dataset.GetRasterBand(1)
s0datasetPol = band.GetMetadata()['POLARIMETRIC_INTERP']
for i in range(1, s0dataset.RasterCount + 1):
iBand = s0dataset.GetRasterBand(i)
polString = iBand.GetMetadata()['POLARIMETRIC_INTERP']
suffix = polString
# The nansat data will be complex
# if the SAR data is of type 10
dtype = iBand.DataType
if dtype == 10:
# add intensity band
metaDict.append({
'src': {
'SourceFilename': ('RADARSAT_2_CALIB:SIGMA0:' +
fileName + '/product.xml'),
'SourceBand':
i,
'DataType':
dtype
},
'dst': {
'wkv':
'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'intensity',
'SourceTransferType':
gdal.GetDataTypeName(dtype),
'suffix': suffix,
'polarization': polString,
'dataType': 6
}
})
# modify suffix for adding the compled band below
suffix = polString + '_complex'
pol.append(polString)
metaDict.append({
'src': {
'SourceFilename': ('RADARSAT_2_CALIB:SIGMA0:' +
fileName + '/product.xml'),
'SourceBand':
i,
'DataType':
dtype
},
'dst': {
'wkv':
'surface_backwards_scattering_coefficient_of_radar_wave',
'suffix': suffix,
'polarization': polString
}
})
if dataset[1] == 'Beta Nought calibrated':
b0dataset = gdal.Open(dataset[0])
b0datasetName = dataset[0][:]
for j in range(1, b0dataset.RasterCount + 1):
jBand = b0dataset.GetRasterBand(j)
polString = jBand.GetMetadata()['POLARIMETRIC_INTERP']
if polString == s0datasetPol:
b0datasetBand = j
###############################
# Add SAR look direction
###############################
d = Domain(ds=gdalDataset)
lon, lat = d.get_geolocation_grids(100)
'''
(GDAL?) Radarsat-2 data is stored with maximum latitude at first
element of each column and minimum longitude at first element of each
row (e.g. np.shape(lat)=(59,55) -> latitude maxima are at lat[0,:],
and longitude minima are at lon[:,0])
In addition, there is an interpolation error for direct estimate along
azimuth. We therefore estimate the heading along range and add 90
degrees to get the "satellite" heading.
'''
if str(passDirection).upper() == 'DESCENDING':
sat_heading = initial_bearing(lon[:, :-1], lat[:, :-1], lon[:, 1:],
lat[:, 1:]) + 90
elif str(passDirection).upper() == 'ASCENDING':
sat_heading = initial_bearing(lon[:, 1:], lat[:, 1:], lon[:, :-1],
lat[:, :-1]) + 90
else:
print 'Can not decode pass direction: ' + str(passDirection)
# Calculate SAR look direction
SAR_look_direction = sat_heading + antennaPointing
# Interpolate to regain lost row
SAR_look_direction = np.mod(SAR_look_direction, 360)
SAR_look_direction = scipy.ndimage.interpolation.zoom(
SAR_look_direction, (1, 11. / 10.))
# Decompose, to avoid interpolation errors around 0 <-> 360
SAR_look_direction_u = np.sin(np.deg2rad(SAR_look_direction))
SAR_look_direction_v = np.cos(np.deg2rad(SAR_look_direction))
look_u_VRT = VRT(array=SAR_look_direction_u, lat=lat, lon=lon)
look_v_VRT = VRT(array=SAR_look_direction_v, lat=lat, lon=lon)
# Note: If incidence angle and look direction are stored in
# same VRT, access time is about twice as large
lookVRT = VRT(lat=lat, lon=lon)
lookVRT._create_band([{
'SourceFilename': look_u_VRT.fileName,
'SourceBand': 1
}, {
'SourceFilename': look_v_VRT.fileName,
'SourceBand': 1
}], {'PixelFunctionType': 'UVToDirectionTo'})
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
# Store VRTs so that they are accessible later
self.bandVRTs['look_u_VRT'] = look_u_VRT
self.bandVRTs['look_v_VRT'] = look_v_VRT
self.bandVRTs['lookVRT'] = lookVRT
# Add band to full sized VRT
lookFileName = self.bandVRTs['lookVRT'].fileName
metaDict.append({
'src': {
'SourceFilename': lookFileName,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': 'SAR_look_direction'
}
})
###############################
# Create bands
###############################
self._create_bands(metaDict)
###################################################
# Add derived band (incidence angle) calculated
# using pixel function "BetaSigmaToIncidence":
###################################################
src = [{
'SourceFilename': b0datasetName,
'SourceBand': b0datasetBand,
'DataType': dtype
}, {
'SourceFilename': s0datasetName,
'SourceBand': 1,
'DataType': dtype
}]
dst = {
'wkv': 'angle_of_incidence',
'PixelFunctionType': 'BetaSigmaToIncidence',
'SourceTransferType': gdal.GetDataTypeName(dtype),
'_FillValue': -10000, # NB: this is also hard-coded in
# pixelfunctions.c
'dataType': 6,
'name': 'incidence_angle'
}
self._create_band(src, dst)
self.dataset.FlushCache()
###################################################################
# Add sigma0_VV - pixel function of sigma0_HH and beta0_HH
# incidence angle is calculated within pixel function
# It is assummed that HH is the first band in sigma0 and
# beta0 sub datasets
###################################################################
if 'VV' not in pol and 'HH' in pol:
s0datasetNameHH = pol.index('HH') + 1
src = [{
'SourceFilename': s0datasetName,
'SourceBand': s0datasetNameHH,
'DataType': 6
}, {
'SourceFilename': b0datasetName,
'SourceBand': b0datasetBand,
'DataType': 6
}]
dst = {
'wkv':
'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sigma0HHBetaToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'
}
self._create_band(src, dst)
self.dataset.FlushCache()
############################################
# Add SAR metadata
############################################
if antennaPointing == 90:
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'RIGHT')
if antennaPointing == -90:
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'LEFT')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
str(passDirection).upper())
# Set time
validTime = gdalDataset.GetMetadata()['ACQUISITION_START_TIME']
self.logger.info('Valid time: %s', str(validTime))
self._set_time(parse(validTime))
# set SADCAT specific metadata
self.dataset.SetMetadataItem(
'start_date', (parse(gdalMetadata['FIRST_LINE_TIME']).isoformat()))
self.dataset.SetMetadataItem(
'stop_date', (parse(gdalMetadata['LAST_LINE_TIME']).isoformat()))
self.dataset.SetMetadataItem('sensor', 'SAR')
self.dataset.SetMetadataItem('satellite', 'Radarsat2')
self.dataset.SetMetadataItem('mapper', 'radarsat2')
def __init__(self, filename, gdalDataset, gdalMetadata, **kwargs):
'''
Parameters
-----------
filename : string
gdalDataset : gdal dataset
gdalMetadata : gdal metadata
'''
self.setup_ads_parameters(filename, gdalMetadata)
if self.product[0:4] != "ASA_":
raise WrongMapperError
if not IMPORT_SCIPY:
raise NansatReadError('ASAR data cannot be read because scipy is not installed')
# get channel string (remove '/', since NetCDF
# does not support that in metadata)
polarization = [{'channel': gdalMetadata['SPH_MDS1_TX_RX_POLAR']
.replace("/", ""), 'bandNum': 1}]
# if there is the 2nd band, get channel string
if 'SPH_MDS2_TX_RX_POLAR' in gdalMetadata.keys():
channel = gdalMetadata['SPH_MDS2_TX_RX_POLAR'].replace("/", "")
if not(channel.isspace()):
polarization.append({'channel': channel,
'bandNum': 2})
# create empty VRT dataset with geolocation only
self._init_from_gdal_dataset(gdalDataset, metadata=gdalMetadata)
# get calibration constant
gotCalibration = True
try:
for iPolarization in polarization:
metaKey = ('MAIN_PROCESSING_PARAMS_ADS_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
try:
for iPolarization in polarization:
# Apparently some ASAR files have calibration
# constant stored in another place
metaKey = ('MAIN_PROCESSING_PARAMS_ADS_0_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
self.logger.warning('Cannot get calibrationConst')
gotCalibration = False
# add dictionary for raw counts
metaDict = []
for iPolarization in polarization:
iBand = gdalDataset.GetRasterBand(iPolarization['bandNum'])
dtype = iBand.DataType
shortName = 'RawCounts_%s' %iPolarization['channel']
bandName = shortName
dstName = 'raw_counts_%s' % iPolarization['channel']
if (8 <= dtype and dtype < 12):
bandName = shortName+'_complex'
dstName = dstName + '_complex'
metaDict.append({'src': {'SourceFilename': filename,
'SourceBand': iPolarization['bandNum']},
'dst': {'name': dstName}})
'''
metaDict.append({'src': {'SourceFilename': filename,
'SourceBand': iPolarization['bandNum']},
'dst': {'name': 'raw_counts_%s'
% iPolarization['channel']}})
'''
# if raw data is complex, add the intensity band
if (8 <= dtype and dtype < 12):
# choose pixelfunction type
if (dtype == 8 or dtype == 9):
pixelFunctionType = 'IntensityInt'
else:
pixelFunctionType = 'intensity'
# get data type of the intensity band
intensityDataType = {'8': 3, '9': 4,
'10': 5, '11': 6}.get(str(dtype), 4)
# add intensity band
metaDict.append(
{'src': {'SourceFilename': filename,
'SourceBand': iPolarization['bandNum'],
'DataType': dtype},
'dst': {'name': 'raw_counts_%s'
% iPolarization['channel'],
'PixelFunctionType': pixelFunctionType,
'SourceTransferType': gdal.GetDataTypeName(dtype),
'dataType': intensityDataType}})
#####################################################################
# Add incidence angle and look direction through small VRT objects
#####################################################################
lon = self.get_array_from_ADS('first_line_longs')
lat = self.get_array_from_ADS('first_line_lats')
inc = self.get_array_from_ADS('first_line_incidence_angle')
# Calculate SAR look direction (ASAR is always right-looking)
look_direction = initial_bearing(lon[:, :-1], lat[:, :-1],
lon[:, 1:], lat[:, 1:])
# Interpolate to regain lost row
look_direction = scipy.ndimage.interpolation.zoom(
look_direction, (1, 11./10.))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT.from_array(look_direction_u)
look_v_VRT = VRT.from_array(look_direction_v)
# Note: If incidence angle and look direction are stored in
# same VRT, access time is about twice as large
incVRT = VRT.from_array(inc)
lookVRT = VRT.from_lonlat(lon, lat)
lookVRT.create_band([{'SourceFilename': look_u_VRT.filename,
'SourceBand': 1},
{'SourceFilename': look_v_VRT.filename,
'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'})
# Blow up bands to full size
incVRT = incVRT.get_resized_vrt(gdalDataset.RasterXSize, gdalDataset.RasterYSize)
lookVRT = lookVRT.get_resized_vrt(gdalDataset.RasterXSize, gdalDataset.RasterYSize)
# Store VRTs so that they are accessible later
self.band_vrts = {'incVRT': incVRT,
'look_u_VRT': look_u_VRT,
'look_v_VRT': look_v_VRT,
'lookVRT': lookVRT}
# Add band to full sized VRT
incFileName = self.band_vrts['incVRT'].filename
lookFileName = self.band_vrts['lookVRT'].filename
metaDict.append({'src': {'SourceFilename': incFileName,
'SourceBand': 1},
'dst': {'wkv': 'angle_of_incidence',
'name': 'incidence_angle'}})
metaDict.append({'src': {'SourceFilename': lookFileName,
'SourceBand': 1},
'dst': {'wkv': 'sensor_azimuth_angle',
'name': 'look_direction'}})
####################
# Add Sigma0-bands
####################
if gotCalibration:
for iPolarization in polarization:
# add dictionary for sigma0, ice and water
short_names = ['sigma0', 'sigma0_normalized_ice',
'sigma0_normalized_water']
wkt = [
'surface_backwards_scattering_coefficient_of_radar_wave',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_ice',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_water']
sphPass = [gdalMetadata['SPH_PASS'], '', '']
sourceFileNames = [filename, incFileName]
pixelFunctionTypes = ['RawcountsIncidenceToSigma0',
'Sigma0NormalizedIce']
if iPolarization['channel'] == 'HH':
pixelFunctionTypes.append('Sigma0HHNormalizedWater')
elif iPolarization['channel'] == 'VV':
pixelFunctionTypes.append('Sigma0VVNormalizedWater')
# add pixelfunction bands to metaDict
for iPixFunc in range(len(pixelFunctionTypes)):
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
metaDict.append({
'src': srcFiles,
'dst': {'short_name': short_names[iPixFunc],
'wkv': wkt[iPixFunc],
'PixelFunctionType': (
pixelFunctionTypes[iPixFunc]),
'polarization': iPolarization['channel'],
'suffix': iPolarization['channel'],
'pass': sphPass[iPixFunc],
'dataType': 6}})
# add bands with metadata and corresponding values to the empty VRT
self.create_bands(metaDict)
# Add oribit and look information to metadata domain
# ASAR is always right-looking
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'RIGHT')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
gdalMetadata['SPH_PASS'].upper().strip())
###################################################################
# Estimate sigma0_VV from sigma0_HH
###################################################################
polarizations = []
for pp in polarization:
polarizations.append(pp['channel'])
if 'VV' not in polarizations and 'HH' in polarizations:
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
dst = {'wkv': (
'surface_backwards_scattering_coefficient_of_radar_wave'),
'PixelFunctionType': 'Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self.create_band(srcFiles, dst)
self.dataset.FlushCache()
# set time
self._set_envisat_time(gdalMetadata)
# When using TPS for reprojection, use only every 3rd GCP
# to improve performance (tradeoff vs accuracy)
self.dataset.SetMetadataItem('skip_gcps', '3')
self.dataset.SetMetadataItem('time_coverage_start',
(parse(gdalMetadata['MPH_SENSING_START']).
isoformat()))
self.dataset.SetMetadataItem('time_coverage_end',
(parse(gdalMetadata['MPH_SENSING_STOP']).
isoformat()))
# Get dictionary describing the instrument and platform according to
# the GCMD keywords
mm = pti.get_gcmd_instrument('asar')
ee = pti.get_gcmd_platform('envisat')
# TODO: Validate that the found instrument and platform are indeed what
# we want....
self.dataset.SetMetadataItem('instrument', json.dumps(mm))
self.dataset.SetMetadataItem('platform', json.dumps(ee))
def __init__(self, fileName, gdalDataset, gdalMetadata,
manifestonly=False, **kwargs):
if zipfile.is_zipfile(fileName):
zz = zipfile.PyZipFile(fileName)
# Assuming the file names are consistent, the polarization
# dependent data should be sorted equally such that we can use the
# same indices consistently for all the following lists
# THIS IS NOT THE CASE...
mdsFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist() if 'measurement/s1a' in fn]
calFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/calibration/calibration-s1a' in fn]
noiseFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/calibration/noise-s1a' in fn]
annotationFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/s1a' in fn]
manifestFile = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'manifest.safe' in fn]
zz.close()
else:
mdsFiles = glob.glob('%s/measurement/s1a*' % fileName)
calFiles = glob.glob('%s/annotation/calibration/calibration-s1a*'
% fileName)
noiseFiles = glob.glob('%s/annotation/calibration/noise-s1a*'
% fileName)
annotationFiles = glob.glob('%s/annotation/s1a*'
% fileName)
manifestFile = glob.glob('%s/manifest.safe' % fileName)
if (not mdsFiles or not calFiles or not noiseFiles or
not annotationFiles or not manifestFile):
raise WrongMapperError
mdsDict = {}
for ff in mdsFiles:
mdsDict[
os.path.splitext(os.path.basename(ff))[0].split('-')[3]] = ff
self.calXMLDict = {}
for ff in calFiles:
self.calXMLDict[
os.path.splitext(
os.path.basename(ff))[0].split('-')[4]] = self.read_xml(ff)
self.noiseXMLDict = {}
for ff in noiseFiles:
self.noiseXMLDict[
os.path.splitext(
os.path.basename(ff))[0].split('-')[4]] = self.read_xml(ff)
self.annotationXMLDict = {}
for ff in annotationFiles:
self.annotationXMLDict[
os.path.splitext(
os.path.basename(ff))[0].split('-')[3]] = self.read_xml(ff)
self.manifestXML = self.read_xml(manifestFile[0])
# very fast constructor without any bands
if manifestonly:
self.init_from_manifest_only(self.manifestXML,
self.annotationXMLDict[
self.annotationXMLDict.keys()[0]])
return
gdalDatasets = {}
for key in mdsDict.keys():
# Open data files
gdalDatasets[key] = gdal.Open(mdsDict[key])
if not gdalDatasets:
raise WrongMapperError('No Sentinel-1 datasets found')
# Check metadata to confirm it is Sentinel-1 L1
for key in gdalDatasets:
metadata = gdalDatasets[key].GetMetadata()
break
if not 'TIFFTAG_IMAGEDESCRIPTION' in metadata.keys():
raise WrongMapperError
if (not 'Sentinel-1' in metadata['TIFFTAG_IMAGEDESCRIPTION']
and not 'L1' in metadata['TIFFTAG_IMAGEDESCRIPTION']):
raise WrongMapperError
warnings.warn('Sentinel-1 level-1 mapper is not yet adapted to '
'complex data. In addition, the band names should be '
'updated for multi-swath data - '
'and there might be other issues.')
# create empty VRT dataset with geolocation only
for key in gdalDatasets:
VRT.__init__(self, gdalDatasets[key])
break
# Read annotation, noise and calibration xml-files
pol = {}
it = 0
for key in self.annotationXMLDict:
xml = Node.create(self.annotationXMLDict[key])
pol[key] = (xml.node('product').
node('adsHeader')['polarisation'].upper())
it += 1
if it == 1:
# Get incidence angle
pi = xml.node('generalAnnotation').node('productInformation')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
str(pi['pass']))
(X, Y, lon, lat, inc, ele, numberOfSamples,
numberOfLines) = self.read_geolocation_lut(
self.annotationXMLDict[key])
X = np.unique(X)
Y = np.unique(Y)
lon = np.array(lon).reshape(len(Y), len(X))
lat = np.array(lat).reshape(len(Y), len(X))
inc = np.array(inc).reshape(len(Y), len(X))
ele = np.array(ele).reshape(len(Y), len(X))
incVRT = VRT(array=inc, lat=lat, lon=lon)
eleVRT = VRT(array=ele, lat=lat, lon=lon)
incVRT = incVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=2)
eleVRT = eleVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=2)
self.bandVRTs['incVRT'] = incVRT
self.bandVRTs['eleVRT'] = eleVRT
for key in self.calXMLDict:
calibration_LUT_VRTs, longitude, latitude = (
self.get_LUT_VRTs(self.calXMLDict[key],
'calibrationVectorList',
['sigmaNought', 'betaNought',
'gamma', 'dn']
))
self.bandVRTs['LUT_sigmaNought_VRT_'+pol[key]] = (
calibration_LUT_VRTs['sigmaNought'].
get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
self.bandVRTs['LUT_betaNought_VRT_'+pol[key]] = (
calibration_LUT_VRTs['betaNought'].
get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
self.bandVRTs['LUT_gamma_VRT'] = calibration_LUT_VRTs['gamma']
self.bandVRTs['LUT_dn_VRT'] = calibration_LUT_VRTs['dn']
for key in self.noiseXMLDict:
noise_LUT_VRT = self.get_LUT_VRTs(self.noiseXMLDict[key],
'noiseVectorList',
['noiseLut'])[0]
self.bandVRTs['LUT_noise_VRT_'+pol[key]] = (
noise_LUT_VRT['noiseLut'].get_resized_vrt(
self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
metaDict = []
bandNumberDict = {}
bnmax = 0
for key in gdalDatasets.keys():
dsPath, dsName = os.path.split(mdsDict[key])
name = 'DN_%s' % pol[key]
# A dictionary of band numbers is needed for the pixel function
# bands further down. This is not the best solution. It would be
# better to have a function in VRT that returns the number given a
# band name. This function exists in Nansat but could perhaps be
# moved to VRT? The existing nansat function could just call the
# VRT one...
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
band = gdalDatasets[key].GetRasterBand(1)
dtype = band.DataType
metaDict.append({
'src': {
'SourceFilename': mdsDict[key],
'SourceBand': 1,
'DataType': dtype,
},
'dst': {
'name': name,
#'SourceTransferType': gdal.GetDataTypeName(dtype),
#'dataType': 6,
},
})
# add bands with metadata and corresponding values to the empty VRT
self._create_bands(metaDict)
'''
Calibration should be performed as
s0 = DN^2/sigmaNought^2,
where sigmaNought is from e.g.
annotation/calibration/calibration-s1a-iw-grd-hh-20140811t151231-20140811t151301-001894-001cc7-001.xml,
and DN is the Digital Numbers in the tiff files.
Also the noise should be subtracted.
See
https://sentinel.esa.int/web/sentinel/sentinel-1-sar-wiki/-/wiki/Sentinel%20One/Application+of+Radiometric+Calibration+LUT
'''
# Get look direction
sat_heading = initial_bearing(longitude[:-1, :],
latitude[:-1, :],
longitude[1:, :],
latitude[1:, :])
look_direction = scipy.ndimage.interpolation.zoom(
np.mod(sat_heading + 90, 360),
(np.shape(longitude)[0] / (np.shape(longitude)[0]-1.), 1))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT(array=look_direction_u,
lat=latitude, lon=longitude)
look_v_VRT = VRT(array=look_direction_v,
lat=latitude, lon=longitude)
lookVRT = VRT(lat=latitude, lon=longitude)
lookVRT._create_band([{'SourceFilename': look_u_VRT.fileName,
'SourceBand': 1},
{'SourceFilename': look_v_VRT.fileName,
'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'}
)
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1)
# Store VRTs so that they are accessible later
self.bandVRTs['look_u_VRT'] = look_u_VRT
self.bandVRTs['look_v_VRT'] = look_v_VRT
self.bandVRTs['lookVRT'] = lookVRT
metaDict = []
# Add bands to full size VRT
for key in pol:
name = 'LUT_sigmaNought_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': {'SourceFilename':
(self.bandVRTs['LUT_sigmaNought_VRT_' +
pol[key]].fileName),
'SourceBand': 1
},
'dst': {'name': name
}
})
name = 'LUT_noise_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.bandVRTs['LUT_noise_VRT_' +
pol[key]].fileName,
'SourceBand': 1
},
'dst': {
'name': name
}
})
name = 'look_direction'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.bandVRTs['lookVRT'].fileName,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': name
}
})
for key in gdalDatasets.keys():
dsPath, dsName = os.path.split(mdsDict[key])
name = 'sigma0_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_%s' % pol[key]],
},
{'SourceFilename':
(self.bandVRTs['LUT_sigmaNought_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol[key],
'suffix': pol[key],
},
})
name = 'beta0_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_%s' % pol[key]]
},
{'SourceFilename':
(self.bandVRTs['LUT_betaNought_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_brightness_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol[key],
'suffix': pol[key],
},
})
self._create_bands(metaDict)
# Add incidence angle as band
name = 'incidence_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.bandVRTs['incVRT'].fileName,
'SourceBand': 1}
dst = {'wkv': 'angle_of_incidence',
'name': name}
self._create_band(src, dst)
self.dataset.FlushCache()
# Add elevation angle as band
name = 'elevation_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.bandVRTs['eleVRT'].fileName,
'SourceBand': 1}
dst = {'wkv': 'angle_of_elevation',
'name': name}
self._create_band(src, dst)
self.dataset.FlushCache()
# Add sigma0_VV
pp = [pol[key] for key in pol]
if 'VV' not in pp and 'HH' in pp:
name = 'sigma0_VV'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_HH'],
},
{'SourceFilename': (self.bandVRTs['LUT_noise_VRT_HH'].
fileName),
'SourceBand': 1
},
{'SourceFilename': (self.bandVRTs['LUT_sigmaNought_VRT_HH'].
fileName),
'SourceBand': 1,
},
{'SourceFilename': self.bandVRTs['incVRT'].fileName,
'SourceBand': 1}
]
dst = {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self._create_band(src, dst)
self.dataset.FlushCache()
# set time as acquisition start time
n = Node.create(self.manifestXML)
meta = n.node('metadataSection')
for nn in meta.children:
if nn.getAttribute('ID') == u'acquisitionPeriod':
# set valid time
self.dataset.SetMetadataItem(
'time_coverage_start',
parse((nn.node('metadataWrap').
node('xmlData').
node('safe:acquisitionPeriod')['safe:startTime'])
).isoformat())
self.dataset.SetMetadataItem(
'time_coverage_end',
parse((nn.node('metadataWrap').
node('xmlData').
node('safe:acquisitionPeriod')['safe:stopTime'])
).isoformat())
# Get dictionary describing the instrument and platform according to
# the GCMD keywords
mm = pti.get_gcmd_instrument('sar')
ee = pti.get_gcmd_platform('sentinel-1a')
# TODO: Validate that the found instrument and platform are indeed what we
# want....
self.dataset.SetMetadataItem('instrument', json.dumps(mm))
self.dataset.SetMetadataItem('platform', json.dumps(ee))
def __init__(self, filename, gdalDataset, gdalMetadata, **kwargs):
'''
Parameters
-----------
filename : string
gdalDataset : gdal dataset
gdalMetadata : gdal metadata
'''
self.setup_ads_parameters(filename, gdalMetadata)
if self.product[0:4] != "ASA_":
raise WrongMapperError
if not IMPORT_SCIPY:
raise NansatReadError(
'ASAR data cannot be read because scipy is not installed')
# get channel string (remove '/', since NetCDF
# does not support that in metadata)
polarization = [{
'channel':
gdalMetadata['SPH_MDS1_TX_RX_POLAR'].replace("/", ""),
'bandNum':
1
}]
# if there is the 2nd band, get channel string
if 'SPH_MDS2_TX_RX_POLAR' in gdalMetadata.keys():
channel = gdalMetadata['SPH_MDS2_TX_RX_POLAR'].replace("/", "")
if not (channel.isspace()):
polarization.append({'channel': channel, 'bandNum': 2})
# create empty VRT dataset with geolocation only
self._init_from_gdal_dataset(gdalDataset, metadata=gdalMetadata)
# get calibration constant
gotCalibration = True
try:
for iPolarization in polarization:
metaKey = (
'MAIN_PROCESSING_PARAMS_ADS_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
try:
for iPolarization in polarization:
# Apparently some ASAR files have calibration
# constant stored in another place
metaKey = (
'MAIN_PROCESSING_PARAMS_ADS_0_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
self.logger.warning('Cannot get calibrationConst')
gotCalibration = False
# add dictionary for raw counts
metaDict = []
for iPolarization in polarization:
iBand = gdalDataset.GetRasterBand(iPolarization['bandNum'])
dtype = iBand.DataType
shortName = 'RawCounts_%s' % iPolarization['channel']
bandName = shortName
dstName = 'raw_counts_%s' % iPolarization['channel']
if (8 <= dtype and dtype < 12):
bandName = shortName + '_complex'
dstName = dstName + '_complex'
metaDict.append({
'src': {
'SourceFilename': filename,
'SourceBand': iPolarization['bandNum']
},
'dst': {
'name': dstName
}
})
'''
metaDict.append({'src': {'SourceFilename': filename,
'SourceBand': iPolarization['bandNum']},
'dst': {'name': 'raw_counts_%s'
% iPolarization['channel']}})
'''
# if raw data is complex, add the intensity band
if (8 <= dtype and dtype < 12):
# choose pixelfunction type
if (dtype == 8 or dtype == 9):
pixelFunctionType = 'IntensityInt'
else:
pixelFunctionType = 'intensity'
# get data type of the intensity band
intensityDataType = {
'8': 3,
'9': 4,
'10': 5,
'11': 6
}.get(str(dtype), 4)
# add intensity band
metaDict.append({
'src': {
'SourceFilename': filename,
'SourceBand': iPolarization['bandNum'],
'DataType': dtype
},
'dst': {
'name': 'raw_counts_%s' % iPolarization['channel'],
'PixelFunctionType': pixelFunctionType,
'SourceTransferType': gdal.GetDataTypeName(dtype),
'dataType': intensityDataType
}
})
#####################################################################
# Add incidence angle and look direction through small VRT objects
#####################################################################
lon = self.get_array_from_ADS('first_line_longs')
lat = self.get_array_from_ADS('first_line_lats')
inc = self.get_array_from_ADS('first_line_incidence_angle')
# Calculate SAR look direction (ASAR is always right-looking)
look_direction = initial_bearing(lon[:, :-1], lat[:, :-1], lon[:, 1:],
lat[:, 1:])
# Interpolate to regain lost row
look_direction = scipy.ndimage.interpolation.zoom(
look_direction, (1, 11. / 10.))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT.from_array(look_direction_u)
look_v_VRT = VRT.from_array(look_direction_v)
# Note: If incidence angle and look direction are stored in
# same VRT, access time is about twice as large
incVRT = VRT.from_array(inc)
lookVRT = VRT.from_lonlat(lon, lat)
lookVRT.create_band([{
'SourceFilename': look_u_VRT.filename,
'SourceBand': 1
}, {
'SourceFilename': look_v_VRT.filename,
'SourceBand': 1
}], {'PixelFunctionType': 'UVToDirectionTo'})
# Blow up bands to full size
incVRT = incVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
lookVRT = lookVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
# Store VRTs so that they are accessible later
self.band_vrts = {
'incVRT': incVRT,
'look_u_VRT': look_u_VRT,
'look_v_VRT': look_v_VRT,
'lookVRT': lookVRT
}
# Add band to full sized VRT
incFileName = self.band_vrts['incVRT'].filename
lookFileName = self.band_vrts['lookVRT'].filename
metaDict.append({
'src': {
'SourceFilename': incFileName,
'SourceBand': 1
},
'dst': {
'wkv': 'angle_of_incidence',
'name': 'incidence_angle'
}
})
metaDict.append({
'src': {
'SourceFilename': lookFileName,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': 'look_direction'
}
})
####################
# Add Sigma0-bands
####################
if gotCalibration:
for iPolarization in polarization:
# add dictionary for sigma0, ice and water
short_names = [
'sigma0', 'sigma0_normalized_ice',
'sigma0_normalized_water'
]
wkt = [
'surface_backwards_scattering_coefficient_of_radar_wave',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_ice',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_water'
]
sphPass = [gdalMetadata['SPH_PASS'], '', '']
sourceFileNames = [filename, incFileName]
pixelFunctionTypes = [
'RawcountsIncidenceToSigma0', 'Sigma0NormalizedIce'
]
if iPolarization['channel'] == 'HH':
pixelFunctionTypes.append('Sigma0HHNormalizedWater')
elif iPolarization['channel'] == 'VV':
pixelFunctionTypes.append('Sigma0VVNormalizedWater')
# add pixelfunction bands to metaDict
for iPixFunc in range(len(pixelFunctionTypes)):
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
metaDict.append({
'src': srcFiles,
'dst': {
'short_name': short_names[iPixFunc],
'wkv': wkt[iPixFunc],
'PixelFunctionType':
(pixelFunctionTypes[iPixFunc]),
'polarization': iPolarization['channel'],
'suffix': iPolarization['channel'],
'pass': sphPass[iPixFunc],
'dataType': 6
}
})
# add bands with metadata and corresponding values to the empty VRT
self.create_bands(metaDict)
# Add oribit and look information to metadata domain
# ASAR is always right-looking
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'RIGHT')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
gdalMetadata['SPH_PASS'].upper().strip())
###################################################################
# Estimate sigma0_VV from sigma0_HH
###################################################################
polarizations = []
for pp in polarization:
polarizations.append(pp['channel'])
if 'VV' not in polarizations and 'HH' in polarizations:
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
dst = {
'wkv':
('surface_backwards_scattering_coefficient_of_radar_wave'),
'PixelFunctionType': 'Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'
}
self.create_band(srcFiles, dst)
self.dataset.FlushCache()
# set time
self._set_envisat_time(gdalMetadata)
# When using TPS for reprojection, use only every 3rd GCP
# to improve performance (tradeoff vs accuracy)
self.dataset.SetMetadataItem('skip_gcps', '3')
self.dataset.SetMetadataItem(
'time_coverage_start',
(parse(gdalMetadata['MPH_SENSING_START']).isoformat()))
self.dataset.SetMetadataItem(
'time_coverage_end',
(parse(gdalMetadata['MPH_SENSING_STOP']).isoformat()))
# Get dictionary describing the instrument and platform according to
# the GCMD keywords
mm = pti.get_gcmd_instrument('asar')
ee = pti.get_gcmd_platform('envisat')
# TODO: Validate that the found instrument and platform are indeed what
# we want....
self.dataset.SetMetadataItem('instrument', json.dumps(mm))
self.dataset.SetMetadataItem('platform', json.dumps(ee))
def __init__(self, fileName, gdalDataset, gdalMetadata, **kwargs):
'''
Parameters
-----------
fileName : string
gdalDataset : gdal dataset
gdalMetadata : gdal metadata
'''
self.setup_ads_parameters(fileName, gdalMetadata)
if self.product[0:4] != "ASA_":
raise WrongMapperError
# get channel string (remove '/', since NetCDF
# does not support that in metadata)
polarization = [{'channel': gdalMetadata['SPH_MDS1_TX_RX_POLAR']
.replace("/", ""), 'bandNum': 1}]
# if there is the 2nd band, get channel string
if 'SPH_MDS2_TX_RX_POLAR' in gdalMetadata.keys():
channel = gdalMetadata['SPH_MDS2_TX_RX_POLAR'].replace("/", "")
if not(channel.isspace()):
polarization.append({'channel': channel,
'bandNum': 2})
# create empty VRT dataset with geolocation only
VRT.__init__(self, gdalDataset)
# get calibration constant
gotCalibration = True
try:
for iPolarization in polarization:
metaKey = ('MAIN_PROCESSING_PARAMS_ADS_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
try:
for iPolarization in polarization:
# Apparently some ASAR files have calibration
# constant stored in another place
metaKey = ('MAIN_PROCESSING_PARAMS_ADS_0_CALIBRATION_FACTORS.%d.EXT_CAL_FACT'
% (iPolarization['bandNum']))
iPolarization['calibrationConst'] = float(
gdalDataset.GetMetadataItem(metaKey, 'records'))
except:
self.logger.warning('Cannot get calibrationConst')
gotCalibration = False
# add dictionary for raw counts
metaDict = []
for iPolarization in polarization:
metaDict.append({'src': {'SourceFilename': fileName,
'SourceBand': iPolarization['bandNum']},
'dst': {'name': 'raw_counts_%s'
% iPolarization['channel']}})
#####################################################################
# Add incidence angle and look direction through small VRT objects
#####################################################################
lon = self.get_array_from_ADS('first_line_longs')
lat = self.get_array_from_ADS('first_line_lats')
inc = self.get_array_from_ADS('first_line_incidence_angle')
# Calculate SAR look direction (ASAR is always right-looking)
SAR_look_direction = initial_bearing(lon[:, :-1], lat[:, :-1],
lon[:, 1:], lat[:, 1:])
# Interpolate to regain lost row
SAR_look_direction = scipy.ndimage.interpolation.zoom(
SAR_look_direction, (1, 11./10.))
# Decompose, to avoid interpolation errors around 0 <-> 360
SAR_look_direction_u = np.sin(np.deg2rad(SAR_look_direction))
SAR_look_direction_v = np.cos(np.deg2rad(SAR_look_direction))
look_u_VRT = VRT(array=SAR_look_direction_u, lat=lat, lon=lon)
look_v_VRT = VRT(array=SAR_look_direction_v, lat=lat, lon=lon)
# Note: If incidence angle and look direction are stored in
# same VRT, access time is about twice as large
incVRT = VRT(array=inc, lat=lat, lon=lon)
lookVRT = VRT(lat=lat, lon=lon)
lookVRT._create_band([{'SourceFilename': look_u_VRT.fileName,
'SourceBand': 1},
{'SourceFilename': look_v_VRT.fileName,
'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'})
# Blow up bands to full size
incVRT = incVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
lookVRT = lookVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
# Store VRTs so that they are accessible later
self.bandVRTs = {'incVRT': incVRT,
'look_u_VRT': look_u_VRT,
'look_v_VRT': look_v_VRT,
'lookVRT': lookVRT}
# Add band to full sized VRT
incFileName = self.bandVRTs['incVRT'].fileName
lookFileName = self.bandVRTs['lookVRT'].fileName
metaDict.append({'src': {'SourceFilename': incFileName,
'SourceBand': 1},
'dst': {'wkv': 'angle_of_incidence',
'name': 'incidence_angle'}})
metaDict.append({'src': {'SourceFilename': lookFileName,
'SourceBand': 1},
'dst': {'wkv': 'sensor_azimuth_angle',
'name': 'SAR_look_direction'}})
####################
# Add Sigma0-bands
####################
if gotCalibration:
for iPolarization in polarization:
# add dictionary for sigma0, ice and water
short_names = ['sigma0', 'sigma0_normalized_ice',
'sigma0_normalized_water']
wkt = [
'surface_backwards_scattering_coefficient_of_radar_wave',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_ice',
'surface_backwards_scattering_coefficient_of_radar_wave_normalized_over_water']
sphPass = [gdalMetadata['SPH_PASS'], '', '']
sourceFileNames = [fileName, incFileName]
pixelFunctionTypes = ['RawcountsIncidenceToSigma0',
'Sigma0NormalizedIce']
if iPolarization['channel'] == 'HH':
pixelFunctionTypes.append('Sigma0HHNormalizedWater')
elif iPolarization['channel'] == 'VV':
pixelFunctionTypes.append('Sigma0VVNormalizedWater')
# add pixelfunction bands to metaDict
for iPixFunc in range(len(pixelFunctionTypes)):
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
metaDict.append({
'src': srcFiles,
'dst': {'short_name': short_names[iPixFunc],
'wkv': wkt[iPixFunc],
'PixelFunctionType': (
pixelFunctionTypes[iPixFunc]),
'polarization': iPolarization['channel'],
'suffix': iPolarization['channel'],
'pass': sphPass[iPixFunc],
'dataType': 6}})
# add bands with metadata and corresponding values to the empty VRT
self._create_bands(metaDict)
# Add oribit and look information to metadata domain
# ASAR is always right-looking
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'RIGHT')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
gdalMetadata['SPH_PASS'].upper())
###################################################################
# Add sigma0_VV
###################################################################
polarizations = []
for pp in polarization:
polarizations.append(pp['channel'])
if 'VV' not in polarizations and 'HH' in polarizations:
srcFiles = []
for j, jFileName in enumerate(sourceFileNames):
sourceFile = {'SourceFilename': jFileName}
if j == 0:
sourceFile['SourceBand'] = iPolarization['bandNum']
# if ASA_full_incAng,
# set 'ScaleRatio' into source file dict
sourceFile['ScaleRatio'] = np.sqrt(
1.0 / iPolarization['calibrationConst'])
else:
sourceFile['SourceBand'] = 1
srcFiles.append(sourceFile)
dst = {'wkv': (
'surface_backwards_scattering_coefficient_of_radar_wave'),
'PixelFunctionType': 'Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self._create_band(srcFiles, dst)
self.dataset.FlushCache()
# set time
self._set_envisat_time(gdalMetadata)
# When using TPS for reprojection, use only every 3rd GCP
# to improve performance (tradeoff vs accuracy)
self.dataset.SetMetadataItem('skip_gcps', '3')
# set SADCAT specific metadata
self.dataset.SetMetadataItem('start_date',
(parse(gdalMetadata['MPH_SENSING_START']).
isoformat()))
self.dataset.SetMetadataItem('stop_date',
(parse(gdalMetadata['MPH_SENSING_STOP']).
isoformat()))
self.dataset.SetMetadataItem('sensor', 'ASAR')
self.dataset.SetMetadataItem('satellite', 'Envisat')
self.dataset.SetMetadataItem('mapper', 'asar')
def __init__(self, fileName, gdalDataset, gdalMetadata, **kwargs):
if zipfile.is_zipfile(fileName):
zz = zipfile.PyZipFile(fileName)
# Assuming the file names are consistent, the polarization
# dependent data should be sorted equally such that we can use the
# same indices consistently for all the following lists
# THIS IS NOT THE CASE...
mdsFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist() if 'measurement/s1a' in fn]
calFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/calibration/calibration-s1a' in fn]
noiseFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/calibration/noise-s1a' in fn]
annotationFiles = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'annotation/s1a' in fn]
manifestFile = ['/vsizip/%s/%s' % (fileName, fn)
for fn in zz.namelist()
if 'manifest.safe' in fn]
zz.close()
else:
mdsFiles = glob.glob('%s/measurement/s1a*' % fileName)
calFiles = glob.glob('%s/annotation/calibration/calibration-s1a*'
% fileName)
noiseFiles = glob.glob('%s/annotation/calibration/noise-s1a*'
% fileName)
annotationFiles = glob.glob('%s/annotation/s1a*'
% fileName)
manifestFile = glob.glob('%s/manifest.safe' % fileName)
if (not mdsFiles or not calFiles or not noiseFiles or
not annotationFiles or not manifestFile):
raise WrongMapperError
mdsDict = {}
for mds in mdsFiles:
mdsDict[int((os.path.splitext(os.path.basename(mds))[0].
split('-'))[-1:][0])] = mds
calDict = {}
for ff in calFiles:
calDict[int((os.path.splitext(os.path.basename(ff))[0].
split('-'))[-1:][0])] = ff
noiseDict = {}
for ff in noiseFiles:
noiseDict[int((os.path.splitext(os.path.basename(ff))[0].
split('-'))[-1:][0])] = ff
annotationDict = {}
for ff in annotationFiles:
annotationDict[int((os.path.splitext(os.path.basename(ff))[0].
split('-'))[-1:][0])] = ff
manifestXML = self.read_xml(manifestFile[0])
gdalDatasets = {}
for key in mdsDict.keys():
# Open data files
gdalDatasets[key] = gdal.Open(mdsDict[key])
if not gdalDatasets:
raise WrongMapperError('No Sentinel-1 datasets found')
# Check metadata to confirm it is Sentinel-1 L1
for key in gdalDatasets:
metadata = gdalDatasets[key].GetMetadata()
break
if not 'TIFFTAG_IMAGEDESCRIPTION' in metadata.keys():
raise WrongMapperError
if (not 'Sentinel-1' in metadata['TIFFTAG_IMAGEDESCRIPTION']
and not 'L1' in metadata['TIFFTAG_IMAGEDESCRIPTION']):
raise WrongMapperError
warnings.warn('Sentinel-1 level-1 mapper is not yet adapted to '
'complex data. In addition, the band names should be '
'updated for multi-swath data - '
'and there might be other issues.')
# create empty VRT dataset with geolocation only
for key in gdalDatasets:
VRT.__init__(self, gdalDatasets[key])
break
# Read annotation, noise and calibration xml-files
pol = {}
it = 0
for key in annotationDict.keys():
xml = Node.create(self.read_xml(annotationDict[key]))
pol[key] = (xml.node('product').
node('adsHeader')['polarisation'].upper())
it += 1
if it == 1:
# Get incidence angle
pi = xml.node('generalAnnotation').node('productInformation')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
str(pi['pass']))
# Incidence angles are found in
#<geolocationGrid>
# <geolocationGridPointList count="#">
# <geolocationGridPoint>
geolocationGridPointList = (xml.node('geolocationGrid').
children[0])
X = []
Y = []
lon = []
lat = []
inc = []
ele = []
for gridPoint in geolocationGridPointList.children:
X.append(int(gridPoint['pixel']))
Y.append(int(gridPoint['line']))
lon.append(float(gridPoint['longitude']))
lat.append(float(gridPoint['latitude']))
inc.append(float(gridPoint['incidenceAngle']))
ele.append(float(gridPoint['elevationAngle']))
X = np.unique(X)
Y = np.unique(Y)
lon = np.array(lon).reshape(len(Y), len(X))
lat = np.array(lat).reshape(len(Y), len(X))
inc = np.array(inc).reshape(len(Y), len(X))
ele = np.array(ele).reshape(len(Y), len(X))
incVRT = VRT(array=inc, lat=lat, lon=lon)
eleVRT = VRT(array=ele, lat=lat, lon=lon)
incVRT = incVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=2)
eleVRT = eleVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=2)
self.bandVRTs['incVRT'] = incVRT
self.bandVRTs['eleVRT'] = eleVRT
for key in calDict.keys():
xml = self.read_xml(calDict[key])
calibration_LUT_VRTs, longitude, latitude = (
self.get_LUT_VRTs(xml,
'calibrationVectorList',
['sigmaNought', 'betaNought',
'gamma', 'dn']
))
self.bandVRTs['LUT_sigmaNought_VRT_'+pol[key]] = (
calibration_LUT_VRTs['sigmaNought'].
get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
self.bandVRTs['LUT_betaNought_VRT_'+pol[key]] = (
calibration_LUT_VRTs['betaNought'].
get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
self.bandVRTs['LUT_gamma_VRT'] = calibration_LUT_VRTs['gamma']
self.bandVRTs['LUT_dn_VRT'] = calibration_LUT_VRTs['dn']
for key in noiseDict.keys():
xml = self.read_xml(noiseDict[key])
noise_LUT_VRT = self.get_LUT_VRTs(xml, 'noiseVectorList',
['noiseLut'])[0]
self.bandVRTs['LUT_noise_VRT_'+pol[key]] = (
noise_LUT_VRT['noiseLut'].get_resized_vrt(
self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1))
metaDict = []
bandNumberDict = {}
bnmax = 0
for key in gdalDatasets.keys():
dsPath, dsName = os.path.split(mdsDict[key])
name = 'DN_%s' % pol[key]
# A dictionary of band numbers is needed for the pixel function
# bands further down. This is not the best solution. It would be
# better to have a function in VRT that returns the number given a
# band name. This function exists in Nansat but could perhaps be
# moved to VRT? The existing nansat function could just call the
# VRT one...
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
band = gdalDatasets[key].GetRasterBand(1)
dtype = band.DataType
metaDict.append({
'src': {
'SourceFilename': mdsDict[key],
'SourceBand': 1,
'DataType': dtype,
},
'dst': {
'name': name,
'SourceTransferType': gdal.GetDataTypeName(dtype),
'dataType': 6,
},
})
# add bands with metadata and corresponding values to the empty VRT
self._create_bands(metaDict)
'''
Calibration should be performed as
s0 = DN^2/sigmaNought^2,
where sigmaNought is from e.g.
annotation/calibration/calibration-s1a-iw-grd-hh-20140811t151231-20140811t151301-001894-001cc7-001.xml,
and DN is the Digital Numbers in the tiff files.
Also the noise should be subtracted.
See
https://sentinel.esa.int/web/sentinel/sentinel-1-sar-wiki/-/wiki/Sentinel%20One/Application+of+Radiometric+Calibration+LUT
'''
# Get look direction
sat_heading = initial_bearing(longitude[:-1, :],
latitude[:-1, :],
longitude[1:, :],
latitude[1:, :])
look_direction = scipy.ndimage.interpolation.zoom(
np.mod(sat_heading + 90, 360),
(np.shape(longitude)[0] / (np.shape(longitude)[0]-1.), 1))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT(array=look_direction_u,
lat=latitude, lon=longitude)
look_v_VRT = VRT(array=look_direction_v,
lat=latitude, lon=longitude)
lookVRT = VRT(lat=latitude, lon=longitude)
lookVRT._create_band([{'SourceFilename': look_u_VRT.fileName,
'SourceBand': 1},
{'SourceFilename': look_v_VRT.fileName,
'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'}
)
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(self.dataset.RasterXSize,
self.dataset.RasterYSize,
eResampleAlg=1)
# Store VRTs so that they are accessible later
self.bandVRTs['look_u_VRT'] = look_u_VRT
self.bandVRTs['look_v_VRT'] = look_v_VRT
self.bandVRTs['lookVRT'] = lookVRT
metaDict = []
# Add bands to full size VRT
for key in pol:
name = 'LUT_sigmaNought_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': {'SourceFilename':
(self.bandVRTs['LUT_sigmaNought_VRT_' +
pol[key]].fileName),
'SourceBand': 1
},
'dst': {'name': name
}
})
name = 'LUT_noise_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.bandVRTs['LUT_noise_VRT_' +
pol[key]].fileName,
'SourceBand': 1
},
'dst': {
'name': name
}
})
name = 'look_direction'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.bandVRTs['lookVRT'].fileName,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': name
}
})
for key in gdalDatasets.keys():
dsPath, dsName = os.path.split(mdsDict[key])
name = 'sigma0_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_%s' % pol[key]],
},
{'SourceFilename': (self.bandVRTs['LUT_noise_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
},
{'SourceFilename':
(self.bandVRTs['LUT_sigmaNought_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol[key],
'suffix': pol[key],
},
})
name = 'beta0_%s' % pol[key]
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_%s' % pol[key]]
},
{'SourceFilename': (self.bandVRTs['LUT_noise_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
},
{'SourceFilename':
(self.bandVRTs['LUT_betaNought_VRT_%s'
% pol[key]].fileName),
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_brightness_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol[key],
'suffix': pol[key],
},
})
self._create_bands(metaDict)
# Add incidence angle as band
name = 'incidence_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.bandVRTs['incVRT'].fileName,
'SourceBand': 1}
dst = {'wkv': 'angle_of_incidence',
'name': name}
self._create_band(src, dst)
self.dataset.FlushCache()
# Add elevation angle as band
name = 'elevation_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.bandVRTs['eleVRT'].fileName,
'SourceBand': 1}
dst = {'wkv': 'angle_of_elevation',
'name': name}
self._create_band(src, dst)
self.dataset.FlushCache()
# Add sigma0_VV
pp = [pol[key] for key in pol]
if 'VV' not in pp and 'HH' in pp:
name = 'sigma0_VV'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = [{'SourceFilename': self.fileName,
'SourceBand': bandNumberDict['DN_HH'],
},
{'SourceFilename': (self.bandVRTs['LUT_noise_VRT_HH'].
fileName),
'SourceBand': 1
},
{'SourceFilename': (self.bandVRTs['LUT_sigmaNought_VRT_HH'].
fileName),
'SourceBand': 1,
},
{'SourceFilename': self.bandVRTs['incVRT'].fileName,
'SourceBand': 1}
]
dst = {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self._create_band(src, dst)
self.dataset.FlushCache()
# set time as acquisition start time
n = Node.create(manifestXML)
meta = n.node('metadataSection')
for nn in meta.children:
if nn.getAttribute('ID') == u'acquisitionPeriod':
# set valid time
self.dataset.SetMetadataItem(
'time_coverage_start',
parse((nn.node('metadataWrap').
node('xmlData').
node('safe:acquisitionPeriod')['safe:startTime'])
).isoformat())
self.dataset.SetMetadataItem(
'time_coverage_end',
parse((nn.node('metadataWrap').
node('xmlData').
node('safe:acquisitionPeriod')['safe:stopTime'])
).isoformat())
# Get dictionary describing the instrument and platform according to
# the GCMD keywords
mm = pti.get_gcmd_instrument('sar')
ee = pti.get_gcmd_platform('sentinel-1a')
# TODO: Validate that the found instrument and platform are indeed what we
# want....
self.dataset.SetMetadataItem('instrument', json.dumps(mm))
self.dataset.SetMetadataItem('platform', json.dumps(ee))
def __init__(self, fileName, gdalDataset, gdalMetadata, **kwargs):
''' Create Radarsat2 VRT '''
fPathName, fExt = os.path.splitext(fileName)
if zipfile.is_zipfile(fileName):
# Open zip file using VSI
fPath, fName = os.path.split(fPathName)
fileName = '/vsizip/%s/%s' % (fileName, fName)
if not 'RS' in fName[0:2]:
raise WrongMapperError('Provided data is not Radarsat-2')
gdalDataset = gdal.Open(fileName)
gdalMetadata = gdalDataset.GetMetadata()
#if it is not RADARSAT-2, return
if (not gdalMetadata or
not 'SATELLITE_IDENTIFIER' in gdalMetadata.keys()):
raise WrongMapperError
elif gdalMetadata['SATELLITE_IDENTIFIER'] != 'RADARSAT-2':
raise WrongMapperError
# read product.xml
productXmlName = os.path.join(fileName, 'product.xml')
productXml = self.read_xml(productXmlName)
# Get additional metadata from product.xml
rs2_0 = Node.create(productXml)
rs2_1 = rs2_0.node('sourceAttributes')
rs2_2 = rs2_1.node('radarParameters')
if rs2_2['antennaPointing'].lower() == 'right':
antennaPointing = 90
else:
antennaPointing = -90
rs2_3 = rs2_1.node('orbitAndAttitude').node('orbitInformation')
passDirection = rs2_3['passDirection']
# create empty VRT dataset with geolocation only
VRT.__init__(self, gdalDataset)
#define dictionary of metadata and band specific parameters
pol = []
metaDict = []
# Get the subdataset with calibrated sigma0 only
for dataset in gdalDataset.GetSubDatasets():
if dataset[1] == 'Sigma Nought calibrated':
s0dataset = gdal.Open(dataset[0])
s0datasetName = dataset[0][:]
band = s0dataset.GetRasterBand(1)
s0datasetPol = band.GetMetadata()['POLARIMETRIC_INTERP']
for i in range(1, s0dataset.RasterCount+1):
iBand = s0dataset.GetRasterBand(i)
polString = iBand.GetMetadata()['POLARIMETRIC_INTERP']
suffix = polString
# The nansat data will be complex
# if the SAR data is of type 10
dtype = iBand.DataType
if dtype == 10:
# add intensity band
metaDict.append(
{'src': {'SourceFilename':
('RADARSAT_2_CALIB:SIGMA0:'
+ fileName + '/product.xml'),
'SourceBand': i,
'DataType': dtype},
'dst': {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'intensity',
'SourceTransferType': gdal.GetDataTypeName(dtype),
'suffix': suffix,
'polarization': polString,
'dataType': 6}})
# modify suffix for adding the compled band below
suffix = polString+'_complex'
pol.append(polString)
metaDict.append(
{'src': {'SourceFilename': ('RADARSAT_2_CALIB:SIGMA0:'
+ fileName
+ '/product.xml'),
'SourceBand': i,
'DataType': dtype},
'dst': {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'suffix': suffix,
'polarization': polString}})
if dataset[1] == 'Beta Nought calibrated':
b0dataset = gdal.Open(dataset[0])
b0datasetName = dataset[0][:]
for j in range(1, b0dataset.RasterCount+1):
jBand = b0dataset.GetRasterBand(j)
polString = jBand.GetMetadata()['POLARIMETRIC_INTERP']
if polString == s0datasetPol:
b0datasetBand = j
###############################
# Add SAR look direction
###############################
d = Domain(ds=gdalDataset)
lon, lat = d.get_geolocation_grids(100)
'''
(GDAL?) Radarsat-2 data is stored with maximum latitude at first
element of each column and minimum longitude at first element of each
row (e.g. np.shape(lat)=(59,55) -> latitude maxima are at lat[0,:],
and longitude minima are at lon[:,0])
In addition, there is an interpolation error for direct estimate along
azimuth. We therefore estimate the heading along range and add 90
degrees to get the "satellite" heading.
'''
if str(passDirection).upper() == 'DESCENDING':
sat_heading = initial_bearing(lon[:, :-1], lat[:, :-1],
lon[:, 1:], lat[:, 1:]) + 90
elif str(passDirection).upper() == 'ASCENDING':
sat_heading = initial_bearing(lon[:, 1:], lat[:, 1:],
lon[:, :-1], lat[:, :-1]) + 90
else:
print 'Can not decode pass direction: ' + str(passDirection)
# Calculate SAR look direction
look_direction = sat_heading + antennaPointing
# Interpolate to regain lost row
look_direction = np.mod(look_direction, 360)
look_direction = scipy.ndimage.interpolation.zoom(
look_direction, (1, 11./10.))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT(array=look_direction_u, lat=lat, lon=lon)
look_v_VRT = VRT(array=look_direction_v, lat=lat, lon=lon)
# Note: If incidence angle and look direction are stored in
# same VRT, access time is about twice as large
lookVRT = VRT(lat=lat, lon=lon)
lookVRT._create_band(
[{'SourceFilename': look_u_VRT.fileName, 'SourceBand': 1},
{'SourceFilename': look_v_VRT.fileName, 'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'})
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(gdalDataset.RasterXSize,
gdalDataset.RasterYSize)
# Store VRTs so that they are accessible later
self.bandVRTs['look_u_VRT'] = look_u_VRT
self.bandVRTs['look_v_VRT'] = look_v_VRT
self.bandVRTs['lookVRT'] = lookVRT
# Add band to full sized VRT
lookFileName = self.bandVRTs['lookVRT'].fileName
metaDict.append({'src': {'SourceFilename': lookFileName,
'SourceBand': 1},
'dst': {'wkv': 'sensor_azimuth_angle',
'name': 'look_direction'}})
###############################
# Create bands
###############################
self._create_bands(metaDict)
###################################################
# Add derived band (incidence angle) calculated
# using pixel function "BetaSigmaToIncidence":
###################################################
src = [{'SourceFilename': b0datasetName,
'SourceBand': b0datasetBand,
'DataType': dtype},
{'SourceFilename': s0datasetName,
'SourceBand': 1,
'DataType': dtype}]
dst = {'wkv': 'angle_of_incidence',
'PixelFunctionType': 'BetaSigmaToIncidence',
'SourceTransferType': gdal.GetDataTypeName(dtype),
'_FillValue': -10000, # NB: this is also hard-coded in
# pixelfunctions.c
'dataType': 6,
'name': 'incidence_angle'}
self._create_band(src, dst)
self.dataset.FlushCache()
###################################################################
# Add sigma0_VV - pixel function of sigma0_HH and beta0_HH
# incidence angle is calculated within pixel function
# It is assummed that HH is the first band in sigma0 and
# beta0 sub datasets
###################################################################
if 'VV' not in pol and 'HH' in pol:
s0datasetNameHH = pol.index('HH')+1
src = [{'SourceFilename': s0datasetName,
'SourceBand': s0datasetNameHH,
'DataType': 6},
{'SourceFilename': b0datasetName,
'SourceBand': b0datasetBand,
'DataType': 6}]
dst = {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sigma0HHBetaToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self._create_band(src, dst)
self.dataset.FlushCache()
############################################
# Add SAR metadata
############################################
if antennaPointing == 90:
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'RIGHT')
if antennaPointing == -90:
self.dataset.SetMetadataItem('ANTENNA_POINTING', 'LEFT')
self.dataset.SetMetadataItem('ORBIT_DIRECTION',
str(passDirection).upper())
# set valid time
self.dataset.SetMetadataItem('time_coverage_start',
(parse(gdalMetadata['FIRST_LINE_TIME']).
isoformat()))
self.dataset.SetMetadataItem('time_coverage_end',
(parse(gdalMetadata['LAST_LINE_TIME']).
isoformat()))
# Get dictionary describing the instrument and platform according to
# the GCMD keywords
mm = pti.get_gcmd_instrument('sar')
ee = pti.get_gcmd_platform('radarsat-2')
# TODO: Validate that the found instrument and platform are indeed what we
# want....
self.dataset.SetMetadataItem('instrument', json.dumps(mm))
self.dataset.SetMetadataItem('platform', json.dumps(ee))
self._add_swath_mask_band()
def __init__(self, filename, gdalDataset, gdalMetadata, fast=False, fixgcp=True, **kwargs):
if not os.path.split(filename.rstrip('/'))[1][:3] in ['S1A', 'S1B']:
raise WrongMapperError('%s: Not Sentinel 1A or 1B' %filename)
if not IMPORT_SCIPY:
raise NansatReadError('Sentinel-1 data cannot be read because scipy is not installed')
if zipfile.is_zipfile(filename):
zz = zipfile.PyZipFile(filename)
# Assuming the file names are consistent, the polarization
# dependent data should be sorted equally such that we can use the
# same indices consistently for all the following lists
# THIS IS NOT THE CASE...
mds_files = ['/vsizip/%s/%s' % (filename, fn)
for fn in zz.namelist() if 'measurement/s1' in fn]
calibration_files = ['/vsizip/%s/%s' % (filename, fn)
for fn in zz.namelist()
if 'annotation/calibration/calibration-s1' in fn]
noise_files = ['/vsizip/%s/%s' % (filename, fn)
for fn in zz.namelist()
if 'annotation/calibration/noise-s1' in fn]
annotation_files = ['/vsizip/%s/%s' % (filename, fn)
for fn in zz.namelist()
if 'annotation/s1' in fn]
manifest_files = ['/vsizip/%s/%s' % (filename, fn)
for fn in zz.namelist()
if 'manifest.safe' in fn]
zz.close()
else:
mds_files = glob.glob('%s/measurement/s1*' % filename)
calibration_files = glob.glob('%s/annotation/calibration/calibration-s1*'
% filename)
noise_files = glob.glob('%s/annotation/calibration/noise-s1*'
% filename)
annotation_files = glob.glob('%s/annotation/s1*'
% filename)
manifest_files = glob.glob('%s/manifest.safe' % filename)
if (not mds_files or not calibration_files or not noise_files or
not annotation_files or not manifest_files):
raise WrongMapperError(filename)
# convert list of MDS files into dictionary. Keys - polarizations in upper case.
mds_files = {os.path.basename(ff).split('-')[3].upper():ff for ff in mds_files}
polarizations = list(mds_files.keys())
# read annotation files
self.annotation_data = self.read_annotation(annotation_files)
if not fast and fixgcp:
self.correct_geolocation_data()
# read manifest file
manifest_data = self.read_manifest_data(manifest_files[0])
# very fast constructor without any bands only with some metadata and geolocation
self._init_empty(manifest_data, self.annotation_data)
# skip adding bands in the fast mode and RETURN
if fast:
return
# Open data files with GDAL
gdalDatasets = {}
for pol in polarizations:
gdalDatasets[pol] = gdal.Open(mds_files[pol])
if not gdalDatasets[pol]:
raise WrongMapperError('%s: No Sentinel-1 datasets found' % mds_files[pol])
# Check metadata to confirm it is Sentinel-1 L1
metadata = gdalDatasets[polarizations[0]].GetMetadata()
# create full size VRTs with incidenceAngle and elevationAngle
annotation_vrts = self.vrts_from_arrays(self.annotation_data,
['incidenceAngle', 'elevationAngle'])
self.band_vrts.update(annotation_vrts)
# create full size VRTS with calibration LUT
calibration_names = ['sigmaNought', 'betaNought']
calibration_list_tag = 'calibrationVectorList'
for calibration_file in calibration_files:
pol = '_' + os.path.basename(calibration_file).split('-')[4].upper()
xml = self.read_vsi(calibration_file)
calibration_data = self.read_calibration(xml, calibration_list_tag, calibration_names, pol)
calibration_vrts = self.vrts_from_arrays(calibration_data, calibration_names, pol, True, 1)
self.band_vrts.update(calibration_vrts)
# create full size VRTS with noise LUT
for noise_file in noise_files:
pol = '_' + os.path.basename(noise_file).split('-')[4].upper()
xml = self.read_vsi(noise_file)
if '<noiseVectorList' in xml:
noise_list_tag = 'noiseVectorList'
noise_name = 'noiseLut'
elif '<noiseRangeVectorList' in xml:
noise_list_tag = 'noiseRangeVectorList'
noise_name = 'noiseRangeLut'
noise_data = self.read_calibration(xml, noise_list_tag, [noise_name], pol)
noise_vrts = self.vrts_from_arrays(noise_data, [noise_name], pol, True, 1)
self.band_vrts.update(noise_vrts)
#### Create metaDict: dict with metadata for all bands
metaDict = []
bandNumberDict = {}
bnmax = 0
for pol in polarizations:
dsPath, dsName = os.path.split(mds_files[pol])
name = 'DN_%s' % pol
# A dictionary of band numbers is needed for the pixel function
# bands further down. This is not the best solution. It would be
# better to have a function in VRT that returns the number given a
# band name. This function exists in Nansat but could perhaps be
# moved to VRT? The existing nansat function could just call the
# VRT one...
bandNumberDict[name] = bnmax + 1
bnmax = bandNumberDict[name]
band = gdalDatasets[pol].GetRasterBand(1)
dtype = band.DataType
metaDict.append({
'src': {
'SourceFilename': mds_files[pol],
'SourceBand': 1,
'DataType': dtype,
},
'dst': {
'name': name,
},
})
# add bands with metadata and corresponding values to the empty VRT
self.create_bands(metaDict)
'''
Calibration should be performed as
s0 = DN^2/sigmaNought^2,
where sigmaNought is from e.g.
annotation/calibration/calibration-s1a-iw-grd-hh-20140811t151231-20140811t151301-001894-001cc7-001.xml,
and DN is the Digital Numbers in the tiff files.
Also the noise should be subtracted.
See
https://sentinel.esa.int/web/sentinel/sentinel-1-sar-wiki/-/wiki/Sentinel%20One/Application+of+Radiometric+Calibration+LUT
The noise correction/subtraction is implemented in an independent package "sentinel1denoised"
See
https://github.com/nansencenter/sentinel1denoised
'''
# Get look direction
longitude, latitude = self.transform_points(calibration_data['pixel'].flatten(),
calibration_data['line'].flatten())
longitude.shape = calibration_data['pixel'].shape
latitude.shape = calibration_data['pixel'].shape
sat_heading = initial_bearing(longitude[:-1, :],
latitude[:-1, :],
longitude[1:, :],
latitude[1:, :])
look_direction = scipy.ndimage.interpolation.zoom(
np.mod(sat_heading + 90, 360),
(np.shape(longitude)[0] / (np.shape(longitude)[0]-1.), 1))
# Decompose, to avoid interpolation errors around 0 <-> 360
look_direction_u = np.sin(np.deg2rad(look_direction))
look_direction_v = np.cos(np.deg2rad(look_direction))
look_u_VRT = VRT.from_array(look_direction_u)
look_v_VRT = VRT.from_array(look_direction_v)
lookVRT = VRT.from_lonlat(longitude, latitude)
lookVRT.create_band([{'SourceFilename': look_u_VRT.filename,
'SourceBand': 1},
{'SourceFilename': look_v_VRT.filename,
'SourceBand': 1}],
{'PixelFunctionType': 'UVToDirectionTo'}
)
# Blow up to full size
lookVRT = lookVRT.get_resized_vrt(self.dataset.RasterXSize, self.dataset.RasterYSize, 1)
# Store VRTs so that they are accessible later
self.band_vrts['look_u_VRT'] = look_u_VRT
self.band_vrts['look_v_VRT'] = look_v_VRT
self.band_vrts['lookVRT'] = lookVRT
metaDict = []
# Add bands to full size VRT
for pol in polarizations:
name = 'sigmaNought_%s' % pol
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': {'SourceFilename':
(self.band_vrts[name].filename),
'SourceBand': 1
},
'dst': {'name': name
}
})
name = 'noise_%s' % pol
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.band_vrts['%s_%s' % (noise_name, pol)].filename,
'SourceBand': 1
},
'dst': {
'name': name
}
})
name = 'look_direction'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append({
'src': {
'SourceFilename': self.band_vrts['lookVRT'].filename,
'SourceBand': 1
},
'dst': {
'wkv': 'sensor_azimuth_angle',
'name': name
}
})
for pol in polarizations:
dsPath, dsName = os.path.split(mds_files[pol])
name = 'sigma0_%s' % pol
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_%s' % pol],
},
{'SourceFilename': self.band_vrts['sigmaNought_%s' % pol].filename,
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol,
'suffix': pol,
},
})
name = 'beta0_%s' % pol
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
metaDict.append(
{'src': [{'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_%s' % pol]
},
{'SourceFilename': self.band_vrts['betaNought_%s' % pol].filename,
'SourceBand': 1
}
],
'dst': {'wkv': 'surface_backwards_brightness_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Calibration',
'polarization': pol,
'suffix': pol,
},
})
self.create_bands(metaDict)
# Add incidence angle as band
name = 'incidence_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.band_vrts['incidenceAngle'].filename,
'SourceBand': 1}
dst = {'wkv': 'angle_of_incidence',
'name': name}
self.create_band(src, dst)
self.dataset.FlushCache()
# Add elevation angle as band
name = 'elevation_angle'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = {'SourceFilename': self.band_vrts['elevationAngle'].filename,
'SourceBand': 1}
dst = {'wkv': 'angle_of_elevation',
'name': name}
self.create_band(src, dst)
self.dataset.FlushCache()
# Add sigma0_VV
if 'VV' not in polarizations and 'HH' in polarizations:
name = 'sigma0_VV'
bandNumberDict[name] = bnmax+1
bnmax = bandNumberDict[name]
src = [{'SourceFilename': self.filename,
'SourceBand': bandNumberDict['DN_HH'],
},
{'SourceFilename': (self.band_vrts['sigmaNought_HH'].
filename),
'SourceBand': 1,
},
{'SourceFilename': self.band_vrts['incidenceAngle'].filename,
'SourceBand': 1}
]
dst = {'wkv': 'surface_backwards_scattering_coefficient_of_radar_wave',
'PixelFunctionType': 'Sentinel1Sigma0HHToSigma0VV',
'polarization': 'VV',
'suffix': 'VV'}
self.create_band(src, dst)
self.dataset.FlushCache()
