def testConvertSCHdot(self):
elp = Planet("Earth").get_elp()
elp.setSCH(66.0, -105.0, 36.0)
#From for_ellipsoid_test.F
#convert_schdot_to_xyzdot, sch_to_xyz
r_sch = [1468.0, -234.0, 7000.0]
r_schdot = [800.0, -400.0, 100.0]
r_xyz = [-672788.46258740244, -2514950.4839521507, 5810769.7976823179]
r_xyzdot = [853.73728655948685, 118.98447071885982, 258.79594191185748]
posXYZ, velXYZ = elp.schdot_to_xyzdot(r_sch, r_schdot)
for (a, b) in zip(r_xyz, posXYZ):
self.assertAlmostEqual(a, b, places=3)
for (a, b) in zip(r_xyzdot, velXYZ):
self.assertAlmostEqual(a, b, places=3)
#convert_schdot_to_xyzdot, xyz_to_sch
r_xyz = [-672100.0, -2514000.0, 5811000.0]
r_xyzdot = [800.0, -400.0, 100.0]
r_sch = [2599.1237664792707, 70.396218844576666, 6764.7576835183427]
r_schdot = [
415.39842327248573, -781.28909619852459, 164.41258499283407
]
posSCH, velSCH = elp.xyzdot_to_schdot(r_xyz, r_xyzdot)
for (a, b) in zip(r_sch, posSCH):
self.assertAlmostEqual(a, b, places=3)
for (a, b) in zip(r_schdot, velSCH):
self.assertAlmostEqual(a, b, delta=0.1)
def testSCH2(self):
elp = Planet("Earth").get_elp()
#Peg at North Pole, S path on prime meridian heading North to South
elp.setSCH(90., 0., -90.)
#SCH = [0.,0.,0.] => XYZ = [elp.b, 0., 0.]
sch = [0., 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], elp.b, places=3)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
#SCH = [pi*elp.pegRadCur, 0, elp.b+(elp.pegOV[2]-elp.pegRadCur)] =>
#XYZ=[0., 0., -elp.b]
sch = [
numpy.pi * elp.pegRadCur, 0., elp.b + elp.pegOV[2] - elp.pegRadCur
]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], -elp.b, places=3)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
def testXYZSCH(self):
elp = Planet("Earth").get_elp()
elp.setSCH(30., 60., 45.)
sch = [-50000., 200000., 1000.]
xyz = elp.sch_to_xyz(sch)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
xyz = [-4.e6, 10.e6, 1.e6]
sch = elp.xyz_to_sch(xyz)
xyz1 = elp.sch_to_xyz(sch)
for (x, x1) in zip(xyz, xyz1):
self.assertAlmostEqual(x, x1, places=3)
elp.setSCH(65., -22., -30.)
sch = [100000., -100000., 100000.]
xyz = elp.sch_to_xyz(sch)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
xyz = [-1.e6, -2.e6, 100.e6]
sch = elp.xyz_to_sch(xyz)
xyz1 = elp.sch_to_xyz(sch)
for (x, x1) in zip(xyz, xyz1):
self.assertAlmostEqual(x, x1, places=3)
def extract_stripmap_metadata(meta_file):
"""Read metadata from shelve file for StripMap stack from ISCE
Parameters: meta_file : str, path of the shelve file, i.e. masterShelve/data.dat
Returns: meta : dict, metadata
"""
import isce
import isceobj
from isceobj.Planet.Planet import Planet
if os.path.basename(
meta_file) == "data.dat": #shelve file from stripmapStack
fbase = os.path.splitext(meta_file)[0]
with shelve.open(fbase, flag='r') as mdb:
frame = mdb['frame']
elif meta_file.endswith(".xml"): #XML file from stripmapApp
frame = load_product(meta_file)
else:
raise ValueError(
'un-recognized isce/stripmap metadata file: {}'.format(meta_file))
metadata = {}
metadata['prf'] = frame.PRF
metadata['startUTC'] = frame.sensingStart
metadata['stopUTC'] = frame.sensingStop
metadata['radarWavelength'] = frame.radarWavelegth
metadata['startingRange'] = frame.startingRange
metadata['polarization'] = str(frame.polarization).replace('/', '')
if metadata['polarization'].startswith("b'"):
metadata['polarization'] = metadata['polarization'][2:4]
metadata['trackNumber'] = frame.trackNumber
metadata['orbitNumber'] = frame.orbitNumber
time_seconds = (frame.sensingStart.hour * 3600.0 +
frame.sensingStart.minute * 60.0 +
frame.sensingStart.second)
metadata['CENTER_LINE_UTC'] = time_seconds
orbit = frame.orbit
peg = orbit.interpolateOrbit(frame.sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity()) #satellite speed
metadata['azimuthResolution'] = frame.platform.antennaLength / 2.0
metadata['azimuthPixelSize'] = Vs / frame.PRF
frame.getInstrument()
rgBandwidth = frame.instrument.pulseLength * frame.instrument.chirpSlope
metadata['rangeResolution'] = abs(SPEED_OF_LIGHT / (2.0 * rgBandwidth))
metadata['rangePixelSize'] = frame.instrument.rangePixelSize
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
refElp.setSCH(llh[0], llh[1], orbit.getENUHeading(frame.sensingMid))
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# for StripMap
metadata['beam_mode'] = 'SM'
return metadata, frame
def testSCHDOT(self):
elp = Planet("Earth").get_elp()
elp.setSCH(0., 0., 90.)
sch = [0., 0., 0.]
schdot = [0., 0., 10.]
xyz, xyzdot = elp.schdot_to_xyzdot(sch, schdot)
ans = [10.0, 0.0, 0.0]
for (x, x1) in zip(xyzdot, ans):
self.assertAlmostEqual(x, x1, places=3)
xyz = [elp.a, 0., 0.]
sch1, schdot1 = elp.xyzdot_to_schdot(xyz, xyzdot)
for (s, s1) in zip(schdot, schdot1):
self.assertAlmostEqual(s, s1, places=3)
elp.setSCH(30., 60., 30.)
sch = [0., 0., 0.]
schdot = [10., 0., 0.]
xyz, xyzdot = elp.schdot_to_xyzdot(sch, schdot)
ans = [-6.495190528383289, -1.2499999999999996, 7.500000000000001]
for (x, x1) in zip(xyzdot, ans):
self.assertAlmostEqual(x, x1, places=3)
xyz = elp.sch_to_xyz(sch)
sch1, schdot1 = elp.xyzdot_to_schdot(xyz, xyzdot)
for (s, s1) in zip(schdot, schdot1):
self.assertAlmostEqual(s, s1, places=3)
def testSETSCH(self):
elp = Planet("Earth").get_elp()
elp.setSCH(66.0, -105.0, 36.0)
#From for_ellipsoid_test.F
r_radcur = 6391364.9560780991
r_ov = [-490.98983883031178, -1832.3990245149471, -34854.866159332916]
r_mat = [
[-0.10527118956908345, 0.75904333077238850, -0.64247272211096140],
[-0.39287742804503412, 0.56176045358432036, 0.72806079369889010],
[0.91354545764260087, 0.32905685648333960, 0.23907380036690279]
]
r_matinv = [
[-0.10527118956908345, -0.39287742804503412, 0.91354545764260087],
[0.75904333077238850, 0.56176045358432036, 0.32905685648333960],
[-0.64247272211096140, 0.72806079369889010, 0.23907380036690279]
]
self.assertAlmostEqual(r_radcur, elp.pegRadCur, places=3)
for (a, b) in zip(r_ov, elp.pegOV):
self.assertAlmostEqual(a, b, places=3)
for i in range(3):
for (a, b) in zip(r_mat[i], elp.pegRotMat[i]):
self.assertAlmostEqual(a, b, places=3)
for i in range(3):
for (a, b) in zip(r_matinv[i], elp.pegRotMatInv[i]):
self.assertAlmostEqual(a, b, places=3)
def extractInfo(xmlName, inps):
'''
Extract required information from pickle file.
'''
from isceobj.Planet.Planet import Planet
from isceobj.Util.geo.ellipsoid import Ellipsoid
frame = ut.loadProduct(xmlName)
burst = frame.bursts[0]
planet = Planet(pname='Earth')
elp = Ellipsoid(planet.ellipsoid.a, planet.ellipsoid.e2, 'WGS84')
data = {}
data['wavelength'] = burst.radarWavelength
tstart = frame.bursts[0].sensingStart
tend = frame.bursts[-1].sensingStop
#tmid = tstart + 0.5*(tend - tstart)
tmid = tstart
orbit = burst.orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
earthRadius = refElp.pegRadCur
altitude = llh[2]
#sv = burst.orbit.interpolateOrbit(tmid, method='hermite')
#pos = sv.getPosition()
#llh = elp.ECEF(pos[0], pos[1], pos[2]).llh()
data['altitude'] = altitude #llh.hgt
#hdg = burst.orbit.getHeading()
data['earthRadius'] = earthRadius #elp.local_radius_of_curvature(llh.lat, hdg)
#azspacing = burst.azimuthTimeInterval * sv.getScalarVelocity()
#azres = 20.0
#corrfile = os.path.join(self._insar.mergedDirname, self._insar.coherenceFilename)
rangeLooks = inps.rglooks
azimuthLooks = inps.azlooks
azfact = 0.8
rngfact = 0.8
corrLooks = rangeLooks * azimuthLooks/(azfact*rngfact)
data['corrlooks'] = corrLooks #inps.rglooks * inps.azlooks * azspacing / azres
data['rglooks'] = inps.rglooks
data['azlooks'] = inps.azlooks
return data
def extract_tops_metadata(xml_file):
"""Read metadata from xml file for Sentinel-1/TOPS
Parameters: xml_file : str, path of the .xml file, i.e. master/IW1.xml
Returns: meta : dict, metadata
"""
import isce
from isceobj.Planet.Planet import Planet
obj = load_product(xml_file)
burst = obj.bursts[0]
burstEnd = obj.bursts[-1]
metadata = {}
metadata['prf'] = burst.prf
metadata['startUTC'] = burst.burstStartUTC
metadata['stopUTC'] = burstEnd.burstStopUTC
metadata['radarWavelength'] = burst.radarWavelength
metadata['rangePixelSize'] = burst.rangePixelSize
metadata['startingRange'] = burst.startingRange
metadata['passDirection'] = burst.passDirection
metadata['polarization'] = burst.polarization
metadata['trackNumber'] = burst.trackNumber
metadata['orbitNumber'] = burst.orbitNumber
time_seconds = (burst.burstStartUTC.hour * 3600.0 +
burst.burstStartUTC.minute * 60.0 +
burst.burstStartUTC.second)
metadata['CENTER_LINE_UTC'] = time_seconds
orbit = burst.orbit
peg = orbit.interpolateOrbit(burst.sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthPixelSize'] = Vs * burst.azimuthTimeInterval
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
refElp.setSCH(llh[0], llh[1], orbit.getENUHeading(burst.sensingMid))
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# for Sentinel-1
metadata['beam_mode'] = 'IW'
metadata['swathNumber'] = burst.swathNumber
# 1. multipel subswaths
xml_files = glob.glob(os.path.join(os.path.dirname(xml_file), 'IW*.xml'))
if len(xml_files) > 1:
swath_num = [
load_product(fname).bursts[0].swathNumber for fname in xml_files
]
metadata['swathNumber'] = ''.join(str(i) for i in sorted(swath_num))
# 2. calculate ASF frame number for Sentinel-1
metadata['firstFrameNumber'] = int(
0.2 * (burst.burstStartUTC - obj.ascendingNodeTime).total_seconds())
metadata['lastFrameNumber'] = int(
0.2 * (burstEnd.burstStopUTC - obj.ascendingNodeTime).total_seconds())
return metadata, burst
def extract_tops_metadata(xml_file):
"""Read metadata from xml file for Sentinel-1/TOPS
Parameters: xml_file : str, path of the .xml file, i.e. master/IW1.xml
Returns: meta : dict, metadata
"""
import isce
from isceobj.Planet.Planet import Planet
obj = load_product(xml_file)
burst = obj.bursts[0]
burstEnd = obj.bursts[-1]
metadata = {}
metadata['prf'] = burst.prf
metadata['startUTC'] = burst.burstStartUTC
metadata['stopUTC'] = burstEnd.burstStopUTC
metadata['radarWavelength'] = burst.radarWavelength
metadata['rangePixelSize'] = burst.rangePixelSize
metadata['startingRange'] = burst.startingRange
metadata['passDirection'] = burst.passDirection
metadata['polarization'] = burst.polarization
metadata['trackNumber'] = burst.trackNumber
metadata['orbitNumber'] = burst.orbitNumber
time_seconds = (burst.burstStartUTC.hour * 3600.0 +
burst.burstStartUTC.minute * 60.0 +
burst.burstStartUTC.second)
metadata['CENTER_LINE_UTC'] = time_seconds
orbit = burst.orbit
peg = orbit.interpolateOrbit(burst.sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthPixelSize'] = Vs*burst.azimuthTimeInterval
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
refElp.setSCH(llh[0], llh[1], orbit.getENUHeading(burst.sensingMid))
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# for Sentinel-1
metadata['beam_mode'] = 'IW'
metadata['swathNumber'] = burst.swathNumber
# 1. multipel subswaths
xml_files = glob.glob(os.path.join(os.path.dirname(xml_file), 'IW*.xml'))
if len(xml_files) > 1:
swath_num = [load_product(fname).bursts[0].swathNumber for fname in xml_files]
metadata['swathNumber'] = ''.join(str(i) for i in sorted(swath_num))
# 2. calculate ASF frame number for Sentinel-1
metadata['firstFrameNumber'] = int(0.2 * (burst.burstStartUTC - obj.ascendingNodeTime).total_seconds())
metadata['lastFrameNumber'] = int(0.2 * (burstEnd.burstStopUTC - obj.ascendingNodeTime).total_seconds())
return metadata
def extract_stripmap_metadata(meta_file):
"""Read metadata from shelve file for StripMap stack from ISCE
Parameters: meta_file : str, path of the shelve file, i.e. masterShelve/data.dat
Returns: meta : dict, metadata
"""
import isce
import isceobj
import isceobj.StripmapProc.StripmapProc as St
from isceobj.Planet.Planet import Planet
if os.path.basename(
meta_file) == "data.dat": #shelve file from stripmapStack
fbase = os.path.splitext(meta_file)[0]
with shelve.open(fbase, flag='r') as mdb:
frame = mdb['frame']
elif meta_file.endswith(".xml"): #XML file from stripmapApp
frame = load_product(meta_file)
metadata = {}
metadata['prf'] = frame.PRF
metadata['startUTC'] = frame.sensingStart
metadata['stopUTC'] = frame.sensingStop
metadata['radarWavelength'] = frame.radarWavelegth
metadata['rangePixelSize'] = frame.instrument.rangePixelSize
metadata['startingRange'] = frame.startingRange
metadata['polarization'] = frame.polarization.replace('/', '')
if metadata['polarization'].startswith("b'"):
metadata['polarization'] = metadata['polarization'][2:4]
metadata['trackNumber'] = frame.trackNumber
metadata['orbitNumber'] = frame.orbitNumber
time_seconds = (frame.sensingStart.hour * 3600.0 +
frame.sensingStart.minute * 60.0 +
frame.sensingStart.second)
metadata['CENTER_LINE_UTC'] = time_seconds
orbit = frame.orbit
peg = orbit.interpolateOrbit(frame.sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthPixelSize'] = Vs / frame.PRF
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
refElp.setSCH(llh[0], llh[1], orbit.getENUHeading(frame.sensingMid))
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# for StripMap
metadata['beam_mode'] = 'SM'
return metadata
def extract_stripmap_metadata(meta_file):
"""Read metadata from shelve file for StripMap stack from ISCE
Parameters: meta_file : str, path of the shelve file, i.e. masterShelve/data.dat
Returns: meta : dict, metadata
"""
import isce
import isceobj
import isceobj.StripmapProc.StripmapProc as St
from isceobj.Planet.Planet import Planet
if os.path.basename(meta_file) == "data.dat": #shelve file from stripmapStack
fbase = os.path.splitext(meta_file)[0]
with shelve.open(fbase, flag='r') as mdb:
frame = mdb['frame']
elif meta_file.endswith(".xml"): #XML file from stripmapApp
frame = load_product(meta_file)
metadata = {}
metadata['prf'] = frame.PRF
metadata['startUTC'] = frame.sensingStart
metadata['stopUTC'] = frame.sensingStop
metadata['radarWavelength'] = frame.radarWavelegth
metadata['rangePixelSize'] = frame.instrument.rangePixelSize
metadata['startingRange'] = frame.startingRange
metadata['polarization'] = frame.polarization.replace('/', '')
if metadata['polarization'].startswith("b'"):
metadata['polarization'] = metadata['polarization'][2:4]
metadata['trackNumber'] = frame.trackNumber
metadata['orbitNumber'] = frame.orbitNumber
time_seconds = (frame.sensingStart.hour*3600.0 +
frame.sensingStart.minute*60.0 +
frame.sensingStart.second)
metadata['CENTER_LINE_UTC'] = time_seconds
orbit = frame.orbit
peg = orbit.interpolateOrbit(frame.sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthPixelSize'] = Vs/frame.PRF
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
refElp.setSCH(llh[0], llh[1], orbit.getENUHeading(frame.sensingMid))
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# for StripMap
metadata['beam_mode'] = 'SM'
return metadata
def testDEBUG(self):
elp = Planet("Earth").get_elp()
elp.setSCH(19.2796271, -155.282224, 58.9432911)
posSCH = [-58033.8, 0.0, 12494.4008]
velSCH = [234.84106135055595, 0.0, 12494.4008]
posXYZ = [-5511147.555045444, -2482080.457636343, 2068314.4442497757]
velXYZ = [-10652.45905403, -5017.70635173, 4184.84656172]
p, v = elp.schdot_to_xyzdot(posSCH, velSCH)
for (a, b) in zip(p, posXYZ):
self.assertAlmostEqual(a, b, places=3)
for (a, b) in zip(v, velXYZ):
self.assertAlmostEqual(a, b, places=3)
def extractInfo(inps):
'''
Extract required information from pickle file.
'''
from isceobj.Planet.Planet import Planet
from isceobj.Util.geo.ellipsoid import Ellipsoid
from iscesys.Component.ProductManager import ProductManager as PM
pm = PM()
#pm.configure
frame = pm.loadProduct(inps.xmlFile)
burst = frame.bursts[0]
planet = Planet(pname='Earth')
elp = Ellipsoid(planet.ellipsoid.a, planet.ellipsoid.e2, 'WGS84')
data = {}
data['wavelength'] = burst.radarWavelength
tstart = frame.bursts[0].sensingStart
#tend = frame.bursts[-1].sensingStop
#tmid = tstart + 0.5*(tend - tstart)
tmid = tstart
orbit = burst.orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
earthRadius = refElp.pegRadCur
altitude = llh[2]
#sv = burst.orbit.interpolateOrbit(tmid, method='hermite')
#pos = sv.getPosition()
#llh = elp.ECEF(pos[0], pos[1], pos[2]).llh()
data['altitude'] = altitude #llh.hgt
#hdg = burst.orbit.getHeading()
data[
'earthRadius'] = earthRadius #elp.local_radius_of_curvature(llh.lat, hdg)
return data
def extractIsceMetadata(shelveFile):
with shelve.open(shelveFile, flag='r') as mdb:
burst = mdb['frame']
#reference = ut.loadProduct(shelveFile)
#burst = reference.bursts[0]
#burstEnd = reference.bursts[-1]
metadata = {}
metadata['radarWavelength'] = burst.radarWavelegth
metadata['rangePixelSize'] = burst.instrument.rangePixelSize
metadata['prf'] = burst.PRF
metadata['startUTC'] = burst.sensingStart
metadata['stopUTC'] = burst.sensingStop
metadata['startingRange'] = burst.startingRange
time_seconds = burst.sensingStart.hour * 3600.0 + burst.sensingStart.minute * 60.0 + burst.sensingStart.second
metadata['CENTER_LINE_UTC'] = time_seconds
Vs = np.linalg.norm(
burst.orbit.interpolateOrbit(burst.sensingMid,
method='hermite').getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthTimeInterval'] = 1. / burst.PRF #azimuthTimeInterval
metadata['azimuthPixelSize'] = Vs * metadata[
'azimuthTimeInterval'] #burst.azimuthTimeInterval
#metadata['azimuthPixelSize'] = burst.instrument.azimuthPixelSize
tstart = burst.sensingStart
tend = burst.sensingStop
tmid = tstart + 0.5 * (tend - tstart)
orbit = burst.orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
return metadata
def testConvertSCH(self):
elp = Planet("Earth").get_elp()
elp.setSCH(66.0, -105.0, 36.0)
#From for_ellipsoid_test.F
#convert_sch_to_xyz, sch_to_xyz
r_sch = [1468.0, -234.0, 7000.0]
r_xyz = [-672788.46258740244, -2514950.4839521507, 5810769.7976823179]
r_llh = [66.009415512068244, -104.97681810507400, 6999.9999703792855]
posXYZ = elp.sch_to_xyz(r_sch)
for (a, b) in zip(r_xyz, posXYZ):
self.assertAlmostEqual(a, b, places=3)
#convert_sch_to_xyz, xyz_to_sch
r_xyz = [-672100.0, -2514000.0, 5811000.0]
r_sch = [2599.1237664792707, 70.396218844576666, 6764.7576835183427]
r_llh = [66.019224990424505, -104.96758302093188, 6764.7576984856278]
posXYZ = elp.sch_to_xyz(r_sch)
for (a, b) in zip(r_xyz, posXYZ):
self.assertAlmostEqual(a, b, places=3)
def extractIsceMetadata(xmlFile):
master = ut.loadProduct(xmlFile)
burst = master.bursts[0]
burstEnd = master.bursts[-1]
metadata = {}
metadata['radarWavelength'] = burst.radarWavelength
metadata['rangePixelSize'] = burst.rangePixelSize
metadata['prf'] = burst.prf
metadata['startUTC'] = burst.burstStartUTC
metadata['stopUTC'] = burstEnd.burstStopUTC
metadata['startingRange'] = burst.startingRange
time_seconds = burst.burstStartUTC.hour * 3600.0 + burst.burstStartUTC.minute * 60.0 + burst.burstStartUTC.second
metadata['CENTER_LINE_UTC'] = time_seconds
Vs = np.linalg.norm(
burst.orbit.interpolateOrbit(burst.sensingMid,
method='hermite').getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthTimeInterval'] = burst.azimuthTimeInterval
metadata['azimuthPixelSize'] = Vs * burst.azimuthTimeInterval
tstart = burst.sensingStart
tend = burstEnd.sensingStop
tmid = tstart + 0.5 * (tend - tstart)
orbit = burst.orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
return metadata
def extract_alosStack_metadata(meta_file, geom_dir):
import isce
import isceobj
from isceobj.Planet.Planet import Planet
track = load_track(os.path.dirname(meta_file),
os.path.basename(meta_file).strip('.track.xml'))
rlooks, alooks, width, length = extract_image_size_alosStack(geom_dir)
spotlightModes, stripmapModes, scansarNominalModes, scansarWideModes, scansarModes = alos2_acquisition_modes(
)
meta = {}
meta['prf'] = track.prf
meta['startUTC'] = track.sensingStart + datetime.timedelta(
seconds=(alooks - 1.0) / 2.0 * track.azimuthLineInterval)
meta['stopUTC'] = meta['startUTC'] + datetime.timedelta(
seconds=(length - 1) * alooks * track.azimuthLineInterval)
meta['radarWavelength'] = track.radarWavelength
meta['startingRange'] = track.startingRange + (
rlooks - 1.0) / 2.0 * track.rangePixelSize
meta['passDirection'] = track.passDirection.upper()
meta['polarization'] = track.frames[0].swaths[0].polarization
#meta['trackNumber'] = track.trackNumber
#meta['orbitNumber'] = track.orbitNumber
meta['PLATFORM'] = sensor.standardize_sensor_name('alos2')
sensingMid = meta['startUTC'] + datetime.timedelta(
seconds=(meta['stopUTC'] - meta['startUTC']).total_seconds() / 2.0)
time_seconds = (sensingMid.hour * 3600.0 + sensingMid.minute * 60.0 +
sensingMid.second)
meta['CENTER_LINE_UTC'] = time_seconds
peg = track.orbit.interpolateOrbit(sensingMid, method='hermite')
Vs = np.linalg.norm(peg.getVelocity())
meta['azimuthPixelSize'] = Vs * track.azimuthLineInterval
meta['rangePixelSize'] = track.rangePixelSize
azBandwidth = track.prf * 0.8
if track.operationMode in scansarNominalModes:
azBandwidth /= 5.0
if track.operationMode in scansarWideModes:
azBandwidth /= 7.0
#use a mean burst synchronizatino here
if track.operationMode in scansarModes:
azBandwidth *= 0.85
meta['azimuthResolution'] = Vs * (1.0 / azBandwidth)
meta['rangeResolution'] = 0.5 * SPEED_OF_LIGHT * (
1.0 / track.frames[0].swaths[0].rangeBandwidth)
elp = Planet(pname='Earth').ellipsoid
llh = elp.xyz_to_llh(peg.getPosition())
elp.setSCH(llh[0], llh[1], track.orbit.getENUHeading(sensingMid))
meta['HEADING'] = track.orbit.getENUHeading(sensingMid)
meta['earthRadius'] = elp.pegRadCur
meta['altitude'] = llh[2]
meta['beam_mode'] = track.operationMode
meta['swathNumber'] = ''.join(
str(swath.swathNumber) for swath in track.frames[0].swaths)
meta['firstFrameNumber'] = track.frames[0].frameNumber
meta['lastFrameNumber'] = track.frames[-1].frameNumber
meta['ALOOKS'] = alooks
meta['RLOOKS'] = rlooks
# NCORRLOOKS for coherence calibration
rgfact = float(meta['rangeResolution']) / float(meta['rangePixelSize'])
azfact = float(meta['azimuthResolution']) / float(meta['azimuthPixelSize'])
meta['NCORRLOOKS'] = meta['RLOOKS'] * meta['ALOOKS'] / (rgfact * azfact)
# update pixel_size for multilooked data
meta['rangePixelSize'] *= meta['RLOOKS']
meta['azimuthPixelSize'] *= meta['ALOOKS']
edge = 3
lat_file = glob.glob(
os.path.join(geom_dir, '*_{}rlks_{}alks.lat'.format(rlooks,
alooks)))[0]
img = isceobj.createImage()
img.load(lat_file + '.xml')
width = img.width
length = img.length
data = np.memmap(lat_file,
dtype='float64',
mode='r',
shape=(length, width))
meta['LAT_REF1'] = str(data[0 + edge, 0 + edge])
meta['LAT_REF2'] = str(data[0 + edge, -1 - edge])
meta['LAT_REF3'] = str(data[-1 - edge, 0 + edge])
meta['LAT_REF4'] = str(data[-1 - edge, -1 - edge])
lon_file = glob.glob(
os.path.join(geom_dir, '*_{}rlks_{}alks.lon'.format(rlooks,
alooks)))[0]
data = np.memmap(lon_file,
dtype='float64',
mode='r',
shape=(length, width))
meta['LON_REF1'] = str(data[0 + edge, 0 + edge])
meta['LON_REF2'] = str(data[0 + edge, -1 - edge])
meta['LON_REF3'] = str(data[-1 - edge, 0 + edge])
meta['LON_REF4'] = str(data[-1 - edge, -1 - edge])
los_file = glob.glob(
os.path.join(geom_dir, '*_{}rlks_{}alks.los'.format(rlooks,
alooks)))[0]
data = np.memmap(los_file,
dtype='float32',
mode='r',
shape=(length * 2, width))[0:length * 2:2, :]
inc_angle = data[int(length / 2), int(width / 2)]
meta['CENTER_INCIDENCE_ANGLE'] = str(inc_angle)
pointingDirection = {'right': -1, 'left': 1}
meta['ANTENNA_SIDE'] = str(pointingDirection[track.pointingDirection])
return meta, track
def runUnwrap(self,costMode = None,initMethod = None, defomax = None, initOnly = None):
if costMode is None:
costMode = 'DEFO'
if initMethod is None:
initMethod = 'MST'
if defomax is None:
defomax = 4.0
if initOnly is None:
initOnly = False
wrapName = os.path.join( self._insar.mergedDirname, self._insar.filtFilename)
unwrapName = os.path.join( self._insar.mergedDirname, self._insar.unwrappedIntFilename)
img = isceobj.createImage()
img.load(wrapName + '.xml')
swathList = self._insar.getValidSwathList(self.swaths)
for swath in swathList[0:1]:
ifg = self._insar.loadProduct( os.path.join(self._insar.fineIfgDirname, 'IW{0}.xml'.format(swath)))
wavelength = ifg.bursts[0].radarWavelength
width = img.getWidth()
####tmid
tstart = ifg.bursts[0].sensingStart
tend = ifg.bursts[-1].sensingStop
tmid = tstart + 0.5*(tend - tstart)
orbit = ifg.bursts[0].orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
earthRadius = refElp.pegRadCur
altitude = llh[2]
corrfile = os.path.join(self._insar.mergedDirname, self._insar.coherenceFilename)
rangeLooks = self.numberRangeLooks
azimuthLooks = self.numberAzimuthLooks
azfact = 0.8
rngfact = 0.8
corrLooks = rangeLooks * azimuthLooks/(azfact*rngfact)
maxComponents = 20
snp = Snaphu()
snp.setInitOnly(initOnly)
snp.setInput(wrapName)
snp.setOutput(unwrapName)
snp.setWidth(width)
snp.setCostMode(costMode)
snp.setEarthRadius(earthRadius)
snp.setWavelength(wavelength)
snp.setAltitude(altitude)
snp.setCorrfile(corrfile)
snp.setInitMethod(initMethod)
snp.setCorrLooks(corrLooks)
snp.setMaxComponents(maxComponents)
snp.setDefoMaxCycles(defomax)
snp.setRangeLooks(rangeLooks)
snp.setAzimuthLooks(azimuthLooks)
snp.setCorFileFormat('FLOAT_DATA')
snp.prepare()
snp.unwrap()
######Render XML
outImage = isceobj.Image.createUnwImage()
outImage.setFilename(unwrapName)
outImage.setWidth(width)
outImage.setAccessMode('read')
outImage.renderVRT()
outImage.createImage()
outImage.finalizeImage()
outImage.renderHdr()
#####Check if connected components was created
if snp.dumpConnectedComponents:
connImage = isceobj.Image.createImage()
connImage.setFilename(unwrapName+'.conncomp')
#At least one can query for the name used
self._insar.connectedComponentsFilename = unwrapName+'.conncomp'
connImage.setWidth(width)
connImage.setAccessMode('read')
connImage.setDataType('BYTE')
connImage.renderVRT()
connImage.createImage()
connImage.finalizeImage()
connImage.renderHdr()
return
def numberOfLooks(self, frame, posting, azlooks, rglooks):
'''
Compute relevant number of looks.
'''
from isceobj.Planet.Planet import Planet
from isceobj.Constants import SPEED_OF_LIGHT
import numpy as np
azFinal = None
rgFinal = None
if azlooks is not None:
azFinal = azlooks
if rglooks is not None:
rgFinal = rglooks
if (azFinal is not None) and (rgFinal is not None):
return (azFinal, rgFinal)
if posting is None:
raise Exception('Input posting is none. Either specify (azlooks, rglooks) or posting in input file')
elp = Planet(pname='Earth').ellipsoid
####First determine azimuth looks
tmid = frame.sensingMid
sv = frame.orbit.interpolateOrbit( tmid, method='hermite') #.getPosition()
llh = elp.xyz_to_llh(sv.getPosition())
if azFinal is None:
hdg = frame.orbit.getENUHeading(tmid)
elp.setSCH(llh[0], llh[1], hdg)
sch, vsch = elp.xyzdot_to_schdot(sv.getPosition(), sv.getVelocity())
azFinal = max(int(np.round(posting * frame.PRF / vsch[0])), 1)
if rgFinal is None:
pulseLength = frame.instrument.pulseLength
chirpSlope = frame.instrument.chirpSlope
#Range Bandwidth
rBW = np.abs(chirpSlope)*pulseLength
# Slant Range resolution
rgres = abs(SPEED_OF_LIGHT / (2.0 * rBW))
r0 = frame.startingRange
rmax = frame.getFarRange()
rng =(r0+rmax)/2
Re = elp.pegRadCur
H = sch[2]
cos_beta_e = (Re**2 + (Re + H)**2 -rng**2)/(2*Re*(Re+H))
sin_bet_e = np.sqrt(1 - cos_beta_e**2)
sin_theta_i = sin_bet_e*(Re + H)/rng
print("incidence angle at the middle of the swath: ", np.arcsin(sin_theta_i)*180.0/np.pi)
groundRangeRes = rgres/sin_theta_i
print("Ground range resolution at the middle of the swath: ", groundRangeRes)
rgFinal = max(int(np.round(posting/groundRangeRes)),1)
return azFinal, rgFinal
def extract_tops_metadata(xml_file):
"""Read metadata from xml file for Sentinel-1/TOPS
Parameters: xml_file : str, path of the .xml file, i.e. reference/IW1.xml
Returns: meta : dict, metadata
burst : isceobj.Sensor.TOPS.BurstSLC.BurstSLC object
"""
import isce
import isceobj
from isceobj.Planet.Planet import Planet
obj = load_product(xml_file)
burst = obj.bursts[0]
burstEnd = obj.bursts[-1]
meta = {}
meta['prf'] = burst.prf
meta['startUTC'] = burst.burstStartUTC
meta['stopUTC'] = burstEnd.burstStopUTC
meta['radarWavelength'] = burst.radarWavelength
meta['startingRange'] = burst.startingRange
meta['passDirection'] = burst.passDirection
meta['polarization'] = burst.polarization
meta['trackNumber'] = burst.trackNumber
meta['orbitNumber'] = burst.orbitNumber
try:
meta['PLATFORM'] = sensor.standardize_sensor_name(obj.spacecraftName)
except:
if os.path.basename(xml_file).startswith('IW'):
meta['PLATFORM'] = 'sen'
time_seconds = (burst.sensingMid.hour * 3600.0 +
burst.sensingMid.minute * 60.0 + burst.sensingMid.second)
meta['CENTER_LINE_UTC'] = time_seconds
orbit = burst.orbit
peg = orbit.interpolateOrbit(burst.sensingMid, method='hermite')
# Sentinel-1 TOPS pixel spacing
Vs = np.linalg.norm(peg.getVelocity()) #satellite speed
meta['azimuthPixelSize'] = Vs * burst.azimuthTimeInterval
meta['rangePixelSize'] = burst.rangePixelSize
# Sentinel-1 TOPS spatial resolution
iw_str = 'IW2'
if os.path.basename(xml_file).startswith('IW'):
iw_str = os.path.splitext(os.path.basename(xml_file))[0]
meta['azimuthResolution'] = sensor.SENSOR_DICT['sen'][iw_str][
'azimuth_resolution']
meta['rangeResolution'] = sensor.SENSOR_DICT['sen'][iw_str][
'range_resolution']
elp = Planet(pname='Earth').ellipsoid
llh = elp.xyz_to_llh(peg.getPosition())
elp.setSCH(llh[0], llh[1], orbit.getENUHeading(burst.sensingMid))
meta['HEADING'] = orbit.getENUHeading(burst.sensingMid)
meta['earthRadius'] = elp.pegRadCur
meta['altitude'] = llh[2]
# for Sentinel-1
meta['beam_mode'] = 'IW'
meta['swathNumber'] = burst.swathNumber
# 1. multipel subswaths
xml_files = glob.glob(os.path.join(os.path.dirname(xml_file), 'IW*.xml'))
if len(xml_files) > 1:
swath_num = [
load_product(fname).bursts[0].swathNumber for fname in xml_files
]
meta['swathNumber'] = ''.join(str(i) for i in sorted(swath_num))
# 2. calculate ASF frame number for Sentinel-1
meta['firstFrameNumber'] = int(
0.2 * (burst.burstStartUTC - obj.ascendingNodeTime).total_seconds())
meta['lastFrameNumber'] = int(
0.2 * (burstEnd.burstStopUTC - obj.ascendingNodeTime).total_seconds())
return meta, burst
def snaphuUnwrap(track,
t,
wrapName,
corName,
unwrapName,
nrlks,
nalks,
costMode='DEFO',
initMethod='MST',
defomax=4.0,
initOnly=False):
#runUnwrap(self, costMode = 'SMOOTH',initMethod = 'MCF', defomax = 2, initOnly = True)
'''
track: track object
t: time for computing earth radius and altitude, normally mid azimuth time
wrapName: input interferogram
corName: input coherence file
unwrapName: output unwrapped interferogram
nrlks: number of range looks of the interferogram
nalks: number of azimuth looks of the interferogram
'''
import datetime
import numpy as np
import isceobj
from contrib.Snaphu.Snaphu import Snaphu
from isceobj.Planet.Planet import Planet
corImg = isceobj.createImage()
corImg.load(corName + '.xml')
width = corImg.width
length = corImg.length
#get altitude
orbit = track.orbit
peg = orbit.interpolateOrbit(t, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(t)
refElp.setSCH(llh[0], llh[1], hdg)
earthRadius = refElp.pegRadCur
altitude = llh[2]
rangeLooks = nrlks
azimuthLooks = nalks
azfact = 0.8
rngfact = 0.8
corrLooks = rangeLooks * azimuthLooks / (azfact * rngfact)
maxComponents = 20
snp = Snaphu()
snp.setInitOnly(initOnly)
snp.setInput(wrapName)
snp.setOutput(unwrapName)
snp.setWidth(width)
snp.setCostMode(costMode)
snp.setEarthRadius(earthRadius)
snp.setWavelength(track.radarWavelength)
snp.setAltitude(altitude)
snp.setCorrfile(corName)
snp.setInitMethod(initMethod)
snp.setCorrLooks(corrLooks)
snp.setMaxComponents(maxComponents)
snp.setDefoMaxCycles(defomax)
snp.setRangeLooks(rangeLooks)
snp.setAzimuthLooks(azimuthLooks)
if corImg.bands == 1:
snp.setCorFileFormat('FLOAT_DATA')
snp.prepare()
snp.unwrap()
######Render XML
outImage = isceobj.Image.createUnwImage()
outImage.setFilename(unwrapName)
outImage.setWidth(width)
outImage.setAccessMode('read')
outImage.renderVRT()
outImage.createImage()
outImage.finalizeImage()
outImage.renderHdr()
#####Check if connected components was created
if snp.dumpConnectedComponents:
connImage = isceobj.Image.createImage()
connImage.setFilename(unwrapName + '.conncomp')
connImage.setWidth(width)
connImage.setAccessMode('read')
connImage.setDataType('BYTE')
connImage.renderVRT()
connImage.createImage()
connImage.finalizeImage()
connImage.renderHdr()
del connImage
del corImg
del snp
del outImage
#remove wired things in no-data area
amp = np.memmap(unwrapName,
dtype='float32',
mode='r+',
shape=(length * 2, width))
wrap = np.fromfile(wrapName, dtype=np.complex64).reshape(length, width)
(amp[0:length * 2:2, :])[np.nonzero(wrap == 0)] = 0
(amp[1:length * 2:2, :])[np.nonzero(wrap == 0)] = 0
del amp
del wrap
return
def extract_isce_metadata(xmlFile, rscFile=None):
import isce
from isceobj.Planet.Planet import Planet
print('extract metadata from xml file:', xmlFile)
metadata = {}
master = load_product(xmlFile)
metadata['spacecraftName'] = master.spacecraftName
burst = master.bursts[0]
burstEnd = master.bursts[-1]
metadata['radarWavelength'] = burst.radarWavelength
metadata['rangePixelSize'] = burst.rangePixelSize
metadata['prf'] = burst.prf
metadata['startUTC'] = burst.burstStartUTC
metadata['stopUTC'] = burstEnd.burstStopUTC
metadata['startingRange'] = burst.startingRange
metadata['passDirection'] = burst.passDirection
metadata['polarization'] = burst.polarization
metadata['trackNumber'] = burst.trackNumber
metadata['orbitNumber'] = burst.orbitNumber
metadata['swathNumber'] = burst.swathNumber
# swathNumber for multipel subswaths
xml_files = glob.glob(os.path.join(os.path.dirname(xmlFile), 'IW*.xml'))
if len(xml_files) > 1:
swath_num = []
for xml_file in xml_files:
swath_num.append(load_product(xml_file).bursts[0].swathNumber)
metadata['swathNumber'] = ''.join(str(i) for i in sorted(swath_num))
# calculate ASF frame number for Sentinel-1
metadata['firstFrameNumber'] = int(
np.floor(
0.2 *
(burst.burstStartUTC - master.ascendingNodeTime).total_seconds()))
metadata['lastFrameNumber'] = int(
np.floor(0.2 * (burstEnd.burstStopUTC -
master.ascendingNodeTime).total_seconds()))
time_seconds = (burst.burstStartUTC.hour * 3600.0 +
burst.burstStartUTC.minute * 60.0 +
burst.burstStartUTC.second)
metadata['CENTER_LINE_UTC'] = time_seconds
Vs = np.linalg.norm(
burst.orbit.interpolateOrbit(burst.sensingMid,
method='hermite').getVelocity())
metadata['satelliteSpeed'] = Vs
metadata['azimuthTimeInterval'] = burst.azimuthTimeInterval
metadata['azimuthPixelSize'] = Vs * burst.azimuthTimeInterval
tstart = burst.sensingStart
tend = burstEnd.sensingStop
tmid = tstart + 0.5 * (tend - tstart)
orbit = burst.orbit
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
metadata['earthRadius'] = refElp.pegRadCur
metadata['altitude'] = llh[2]
# make all value in string format
for key, value in metadata.items():
metadata[key] = str(value)
metadata = readfile.standardize_metadata_isce(metadata)
if rscFile:
print('writing ', rscFile)
writefile.write_roipac_rsc(metadata, rscFile)
return metadata
def testSCH1(self):
elp = Planet("Earth").get_elp()
#S path on Earth equator West to East, origin at y=z=0
elp.setSCH(0., 0., 90.)
#SCH = [0.,0.,0.] => XYZ = [elp.a, 0., 0.]
sch = [0., 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], elp.a, places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
#SCH = [(pi/2)*elp.a, 0, 0] => XYZ=[0., elp.a, 0.]
sch = [numpy.pi * elp.a / 2., 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], elp.a, places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
sch1 = elp.xyz_to_sch(xyz)
for (s, s1) in zip(sch, sch1):
self.assertAlmostEqual(s, s1, places=3)
#SCH = [pi*elp.a, 0, 0] => XYZ=[-elp.a, 0., 0.]
sch = [numpy.pi * elp.a, 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], -elp.a, places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
# Round off causes degenerate case where lon = -180 and lon=180 are the same
# point and xyz(-sch) = xyz(+sch), but -sch != sch
#
# sch1 = elp.xyz_to_sch(xyz)
# print(sch1)
# for (s,s1) in zip(sch, sch1):
# self.assertAlmostEqual(s, s1, places=3)
#SCH = [(3pi/2)*elp.a, 0, 0] => XYZ=[0., -elp.a, 0.]
sch = [3 * numpy.pi * elp.a / 2., 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], -elp.a, places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
# sch1 = elp.xyz_to_sch(xyz)
# for (s,s1) in zip(sch, sch1):
# self.assertAlmostEqual(s, s1, places=3)
#SCH = [2pi*elp.a, 0, 0] => XYZ=[elp.a, 0., 0.]
sch = [2. * numpy.pi * elp.a, 0., 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], elp.a, places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
#Another sch degeneracy due to angle branch cut
# sch1 = elp.xyz_to_sch(xyz)
# for (s,s1) in zip(sch, sch1):
# self.assertAlmostEqual(s, s1, places=3)
#SCH = [0., (pi/2)*elp.a, elp.b-elp.a] => XYZ = [0., 0., elp.b]
sch = [0., numpy.pi * elp.a / 2., elp.b - elp.a]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], elp.b, places=3)
# sch1 = elp.xyz_to_sch(xyz)
# for (s,s1) in zip(sch, sch1):
# self.assertAlmostEqual(s, s1, places=3)
#SCH = [0., pi*elp.a, 0.] => XYZ = [-elp.a, 0., 0.]
sch = [0., numpy.pi * elp.a, 0.]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], -elp.a, places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], 0., places=3)
#SCH = [0., (3pi/2)*elp.a, elp.b-elp.a] => XYZ = [0., 0., -elp.b]
sch = [0., 3. * numpy.pi * elp.a / 2., elp.b - elp.a]
xyz = elp.sch_to_xyz(sch)
self.assertAlmostEqual(xyz[0], 0., places=3)
self.assertAlmostEqual(xyz[1], 0., places=3)
self.assertAlmostEqual(xyz[2], -elp.b, places=3)
def rdr2geo(self, aztime, rng, height=0.,
doppler = None, wvl = None,
planet=None, side=-1):
'''
Returns point on ground at given height and doppler frequency.
Never to be used for heavy duty computing.
'''
from isceobj.Planet.Planet import Planet
####Setup doppler for the equations
dopfact = 0.0
hdg = self.getENUHeading(time=aztime)
sv = self.interpolateOrbit(aztime, method='hermite')
pos = sv.getPosition()
vel = sv.getVelocity()
vmag = np.linalg.norm(vel)
if doppler is not None:
dopfact = doppler(DTU.seconds_since_midnight(aztime), rng) * 0.5 * wvl * rng/vmag
if planet is None:
refElp = Planet(pname='Earth').ellipsoid
else:
refElp = planet.ellipsoid
###Convert position and velocity to local tangent plane
satLLH = refElp.xyz_to_llh(pos)
refElp.setSCH(satLLH[0], satLLH[1], hdg)
radius = refElp.pegRadCur
#####Setup ortho normal system right below satellite
satVec = np.array(pos)
velVec = np.array(vel)
###Setup TCN basis
clat = np.cos(np.radians(satLLH[0]))
slat = np.sin(np.radians(satLLH[0]))
clon = np.cos(np.radians(satLLH[1]))
slon = np.sin(np.radians(satLLH[1]))
nhat = np.array([-clat*clon, -clat*slon, -slat])
temp = np.cross(nhat, velVec)
chat = temp / np.linalg.norm(temp)
temp = np.cross(chat, nhat)
that = temp / np.linalg.norm(temp)
vhat = velVec / np.linalg.norm(velVec)
####Solve the range doppler eqns iteratively
####Initial guess
zsch = height
for ii in range(10):
###Near nadir tests
if (satLLH[2]-zsch) >= rng:
return None
a = (satLLH[2] + radius)
b = (radius + zsch)
costheta = 0.5*(a/rng + rng/a - (b/a)*(b/rng))
sintheta = np.sqrt(1-costheta*costheta)
gamma = rng*costheta
alpha = dopfact - gamma*np.dot(nhat,vhat)/np.dot(vhat,that)
beta = -side*np.sqrt(rng*rng*sintheta*sintheta - alpha*alpha)
delta = alpha * that + beta * chat + gamma * nhat
targVec = satVec + delta
targLLH = refElp.xyz_to_llh(list(targVec))
targXYZ = refElp.llh_to_xyz([targLLH[0], targLLH[1], height])
targSCH = refElp.xyz_to_sch(targXYZ)
zsch = targSCH[2]
rdiff = rng - np.linalg.norm(np.array(satVec) - np.array(targXYZ))
return targLLH
def runUnwrap(inps,
costMode=None,
initMethod=None,
defomax=None,
initOnly=None):
if costMode is None:
costMode = 'DEFO'
if initMethod is None:
initMethod = 'MST'
if defomax is None:
defomax = 4.0
if initOnly is None:
initOnly = False
#get earth radius and altitude using master's orbit
with open(inps.mframe, 'rb') as f:
mframe = pickle.load(f)
azti = 1.0 / mframe.PRF
tmid = mframe.getSensingStart() + datetime.timedelta(
seconds=azti * (mframe.getNumberOfLines() / 2.0))
orbit = mframe.getOrbit()
peg = orbit.interpolateOrbit(tmid, method='hermite')
refElp = Planet(pname='Earth').ellipsoid
llh = refElp.xyz_to_llh(peg.getPosition())
hdg = orbit.getHeading(tmid)
#change to the following after updated to the newest version of isce
#hdg = orbit.getENUHeading(tmid)
refElp.setSCH(llh[0], llh[1], hdg)
earthRadius = refElp.pegRadCur
altitude = llh[2]
wrapName = inps.inf
unwrapName = inps.unw
corrfile = inps.cor
width = getWidth(wrapName + '.xml')
wavelength = mframe.getInstrument().getRadarWavelength()
rangeLooks = inps.rlks
azimuthLooks = inps.alks
#calculate azimuth resolution and pixel size
azres = mframe.platform.antennaLength / 2.0
vel = np.sqrt(peg.velocity[0] * peg.velocity[0] +
peg.velocity[1] * peg.velocity[1] +
peg.velocity[2] * peg.velocity[2])
hgt = np.sqrt(peg.position[0] * peg.position[0] +
peg.position[1] * peg.position[1] +
peg.position[2] * peg.position[2])
azimuthPixelSpacing = earthRadius / hgt * vel * azti
azfact = azres / azimuthPixelSpacing
#calculate range resolution and pixel size
rBW = mframe.instrument.pulseLength * mframe.instrument.chirpSlope
rgres = abs(SPEED_OF_LIGHT / (2.0 * rBW))
slantRangePixelSpacing = 0.5 * SPEED_OF_LIGHT / mframe.rangeSamplingRate
rngfact = rgres / slantRangePixelSpacing
print('azfact: {}, rngfact: {}'.format(azfact, rngfact))
corrLooks = azimuthLooks * rangeLooks / (azfact * rngfact)
maxComponents = 20
snp = Snaphu()
snp.setInitOnly(initOnly) # follow
snp.setInput(wrapName)
snp.setOutput(unwrapName)
snp.setWidth(width)
snp.setCostMode(costMode) # follow
snp.setEarthRadius(earthRadius)
snp.setWavelength(wavelength)
snp.setAltitude(altitude)
snp.setCorrfile(corrfile)
snp.setInitMethod(initMethod) # follow
snp.setCorrLooks(corrLooks)
snp.setMaxComponents(maxComponents)
snp.setDefoMaxCycles(defomax) # follow
snp.setRangeLooks(rangeLooks)
snp.setAzimuthLooks(azimuthLooks)
#snp.setCorFileFormat('FLOAT_DATA')
snp.prepare()
snp.unwrap()
######Render XML
outImage = isceobj.Image.createUnwImage()
outImage.setFilename(unwrapName)
outImage.setWidth(width)
outImage.setAccessMode('read')
outImage.renderVRT()
outImage.createImage()
outImage.finalizeImage()
outImage.renderHdr()
#####Check if connected components was created
if snp.dumpConnectedComponents:
connImage = isceobj.Image.createImage()
connImage.setFilename(unwrapName + '.conncomp')
#At least one can query for the name used
#self._insar.connectedComponentsFilename = unwrapName+'.conncomp'
connImage.setWidth(width)
connImage.setAccessMode('read')
connImage.setDataType('BYTE')
connImage.renderVRT()
connImage.createImage()
connImage.finalizeImage()
connImage.renderHdr()
return
