def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering.
Uses pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
if not optional_datasets or len(optional_datasets) != 4:
vis, red = self.match_data_arrays(projectables)
sata, satz, suna, sunz = self.get_angles(vis)
red.data = da.rechunk(red.data, vis.data.chunks)
else:
vis, red, sata, satz, suna, sunz = self.match_data_arrays(
projectables + optional_datasets)
sata, satz, suna, sunz = optional_datasets
# get the dask array underneath
sata = sata.data
satz = satz.data
suna = suna.data
sunz = sunz.data
# First make sure the two azimuth angles are in the range 0-360:
sata = sata % 360.
suna = suna % 360.
ssadiff = da.absolute(suna - sata)
ssadiff = da.minimum(ssadiff, 360 - ssadiff)
del sata, suna
atmosphere = self.attrs.get('atmosphere', 'us-standard')
aerosol_type = self.attrs.get('aerosol_type', 'marine_clean_aerosol')
rayleigh_key = (vis.attrs['platform_name'], vis.attrs['sensor'],
atmosphere, aerosol_type)
logger.info(
"Removing Rayleigh scattering with atmosphere '%s' and "
"aerosol type '%s' for '%s'", atmosphere, aerosol_type,
vis.attrs['name'])
if rayleigh_key not in self._rayleigh_cache:
corrector = Rayleigh(vis.attrs['platform_name'],
vis.attrs['sensor'],
atmosphere=atmosphere,
aerosol_type=aerosol_type)
self._rayleigh_cache[rayleigh_key] = corrector
else:
corrector = self._rayleigh_cache[rayleigh_key]
try:
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.attrs['name'],
red.data)
except (KeyError, IOError):
logger.warning(
"Could not get the reflectance correction using band name: %s",
vis.attrs['name'])
logger.warning(
"Will try use the wavelength, however, this may be ambiguous!")
refl_cor_band = corrector.get_reflectance(
sunz, satz, ssadiff, vis.attrs['wavelength'][1], red.data)
proj = vis - refl_cor_band
proj.attrs = vis.attrs
self.apply_modifier_info(vis, proj)
return proj
def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering. Uses
pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
(vis, red) = projectables
if vis.shape != red.shape:
raise IncompatibleAreas
try:
(sata, satz, suna, sunz) = optional_datasets
except ValueError:
from pyorbital.astronomy import get_alt_az, sun_zenith_angle
from pyorbital.orbital import get_observer_look
lons, lats = vis.info['area'].get_lonlats()
sunalt, suna = get_alt_az(vis.info['start_time'], lons, lats)
suna = np.rad2deg(suna)
sunz = sun_zenith_angle(vis.info['start_time'], lons, lats)
sata, satel = get_observer_look(vis.info['satellite_longitude'],
vis.info['satellite_latitude'],
vis.info['satellite_altitude'],
vis.info['start_time'], lons, lats,
0)
satz = 90 - satel
del satel
LOG.info('Removing Rayleigh scattering and aerosol absorption')
# First make sure the two azimuth angles are in the range 0-360:
sata = np.mod(sata, 360.)
suna = np.mod(suna, 360.)
ssadiff = np.abs(suna - sata)
ssadiff = np.where(ssadiff > 180, 360 - ssadiff, ssadiff)
del sata, suna
atmosphere = self.info.get('atmosphere', 'us-standard')
aerosol_type = self.info.get('aerosol_type', 'marine_clean_aerosol')
corrector = Rayleigh(vis.info['platform_name'],
vis.info['sensor'],
atmosphere=atmosphere,
aerosol_type=aerosol_type)
try:
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.id.name, red)
except KeyError:
LOG.warning(
"Could not get the reflectance correction using band name: %s",
vis.id.name)
LOG.warning(
"Will try use the wavelength, however, this may be ambiguous!")
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.id.wavelength[1],
red)
proj = Dataset(vis - refl_cor_band, copy=False, **vis.info)
self.apply_modifier_info(vis, proj)
return proj
def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering.
Uses pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
if not optional_datasets or len(optional_datasets) != 4:
vis, red = self.check_areas(projectables)
sata, satz, suna, sunz = self.get_angles(vis)
red.data = da.rechunk(red.data, vis.data.chunks)
else:
vis, red, sata, satz, suna, sunz = self.check_areas(
projectables + optional_datasets)
sata, satz, suna, sunz = optional_datasets
# get the dask array underneath
sata = sata.data
satz = satz.data
suna = suna.data
sunz = sunz.data
LOG.info('Removing Rayleigh scattering and aerosol absorption')
# First make sure the two azimuth angles are in the range 0-360:
sata = sata % 360.
suna = suna % 360.
ssadiff = da.absolute(suna - sata)
ssadiff = da.minimum(ssadiff, 360 - ssadiff)
del sata, suna
atmosphere = self.attrs.get('atmosphere', 'us-standard')
aerosol_type = self.attrs.get('aerosol_type', 'marine_clean_aerosol')
rayleigh_key = (vis.attrs['platform_name'],
vis.attrs['sensor'], atmosphere, aerosol_type)
if rayleigh_key not in self._rayleigh_cache:
corrector = Rayleigh(vis.attrs['platform_name'], vis.attrs['sensor'],
atmosphere=atmosphere,
aerosol_type=aerosol_type)
self._rayleigh_cache[rayleigh_key] = corrector
else:
corrector = self._rayleigh_cache[rayleigh_key]
try:
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.attrs['name'],
red.data)
except (KeyError, IOError):
LOG.warning("Could not get the reflectance correction using band name: %s", vis.attrs['name'])
LOG.warning("Will try use the wavelength, however, this may be ambiguous!")
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.attrs['wavelength'][1],
red.data)
proj = vis - refl_cor_band
proj.attrs = vis.attrs
self.apply_modifier_info(vis, proj)
return proj
def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering. Uses
pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
(vis, blue) = projectables
if vis.shape != blue.shape:
raise IncompatibleAreas
try:
(sata, satz, suna, sunz) = optional_datasets
except ValueError:
from pyorbital.astronomy import get_alt_az, sun_zenith_angle
from pyorbital.orbital import get_observer_look
sunalt, suna = get_alt_az(
vis.info['start_time'], *vis.info['area'].get_lonlats())
suna = np.rad2deg(suna)
sunz = sun_zenith_angle(
vis.info['start_time'], *vis.info['area'].get_lonlats())
lons, lats = vis.info['area'].get_lonlats()
sata, satel = get_observer_look(vis.info['satellite_longitude'],
vis.info['satellite_latitude'],
vis.info['satellite_altitude'],
vis.info['start_time'],
lons, lats, 0)
satz = 90 - satel
del satel
LOG.info('Removing Rayleigh scattering and aerosol absorption')
ssadiff = np.abs(suna - sata)
ssadiff = np.where(ssadiff > 180, 360 - ssadiff, ssadiff)
del sata, suna
atmosphere = self.info.get('atmosphere', 'us-standard')
aerosol_type = self.info.get('aerosol_type', 'marine_clean_aerosol')
corrector = Rayleigh(vis.info['platform_name'], vis.info['sensor'],
atmosphere=atmosphere,
aerosol_type=aerosol_type)
refl_cor_band = corrector.get_reflectance(
sunz, satz, ssadiff, vis.id.wavelength[1], blue)
proj = Dataset(vis - refl_cor_band,
copy=False,
**vis.info)
self.apply_modifier_info(vis, proj)
return proj
def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering. Uses
pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
(vis, ) = projectables
try:
(sata, satz, suna, sunz) = optional_datasets
except ValueError:
from pyorbital.astronomy import get_alt_az, sun_zenith_angle
from pyorbital.orbital import get_observer_look
sunalt, suna = get_alt_az(vis.info['start_time'],
*vis.info['area'].get_lonlats())
sunz = sun_zenith_angle(vis.info['start_time'],
*vis.info['area'].get_lonlats())
lons, lats = vis.info['area'].get_lonlats()
sata, satel = get_observer_look(vis.info['satellite_longitude'],
vis.info['satellite_latitude'],
vis.info['satellite_altitude'],
vis.info['start_time'], lons, lats,
0)
satz = 90 - satel
LOG.info('Removing Rayleigh scattering')
ssadiff = np.abs(suna - sata)
ssadiff = np.where(np.greater(ssadiff, 180), 360 - ssadiff, ssadiff)
corrector = Rayleigh(vis.info['platform_name'],
vis.info['sensor'],
atmosphere='us-standard',
rural_aerosol=False)
refl_cor_band = corrector.get_reflectance(sunz, satz, ssadiff,
vis.info['id'].wavelength[1],
vis)
proj = Projectable(vis - refl_cor_band, copy=False, **vis.info)
self.apply_modifier_info(vis, proj)
return proj
def __call__(self, projectables, optional_datasets=None, **info):
"""Get the corrected reflectance when removing Rayleigh scattering. Uses
pyspectral.
"""
from pyspectral.rayleigh import Rayleigh
(vis,) = projectables
try:
(sata, satz, suna, sunz) = optional_datasets
except ValueError:
from pyorbital.astronomy import get_alt_az, sun_zenith_angle
from pyorbital.orbital import get_observer_look
sunalt, suna = get_alt_az(
vis.info['start_time'], *vis.info['area'].get_lonlats())
sunz = sun_zenith_angle(
vis.info['start_time'], *vis.info['area'].get_lonlats())
lons, lats = vis.info['area'].get_lonlats()
sata, satel = get_observer_look(vis.info['satellite_longitude'],
vis.info['satellite_latitude'],
vis.info['satellite_altitude'],
vis.info['start_time'],
lons, lats, 0)
satz = 90 - satel
LOG.info('Removing Rayleigh scattering')
ssadiff = np.abs(suna - sata)
ssadiff = np.where(np.greater(ssadiff, 180), 360 - ssadiff, ssadiff)
corrector = Rayleigh(
vis.info['platform_name'], vis.info['sensor'], atmosphere='us-standard', rural_aerosol=False)
refl_cor_band = corrector.get_reflectance(
sunz, satz, ssadiff, vis.info['id'].wavelength[1], vis)
proj = Projectable(vis - refl_cor_band,
copy=False,
**vis.info)
self.apply_modifier_info(vis, proj)
return proj
from pyorbital.astronomy import get_alt_az
from pyorbital.orbital import get_observer_look
sunalt, suna = get_alt_az(utc_time, lons, lats)
suna = np.rad2deg(suna)
#sata, satel = get_observer_look(sat_lon, sat_lat, sat_alt, vis.attrs['start_time'], lons, lats, 0)
sata, satel = get_observer_look(longitude, 0.0, sat_h, utc_time, lons, lats, 0)
satz = 90 - satel
# Reyleigh Correction
atmosphere = 'us-standard'
aerosol_type = 'rayleigh_only'
rayleigh_key = ('GOES-16', 'abi', atmosphere, aerosol_type)
corrector = Rayleigh('GOES-16',
'abi',
atmosphere=atmosphere,
aerosol_type=aerosol_type)
sata = sata % 360.
suna = suna % 360.
ssadiff = np.absolute(suna - sata)
ssadiff = np.minimum(ssadiff, 360 - ssadiff)
red = data2 * 100
refl_cor_band_c01 = corrector.get_reflectance(sun_zenith,
satz,
ssadiff,
'C01',
redband=red)
data1 = data1 - (refl_cor_band_c01 / 100)
