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ISCE_INSAR
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improve ALOS-2 ionospheric correciton and geocode

LT1AB
CunrenLiang 2020-05-11 18:05:30 -07:00 committed by GitHub
parent e68db01bf9
commit 28bb81ed03
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 44 additions and 3 deletions
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5
components/isceobj/Alos2burstProc/runGeocodeSd.py
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@ -4,6 +4,7 @@
#
import os
import glob
import logging
import numpy as np
@ -31,7 +32,9 @@ def runGeocodeSd(self):
if self.geocodeListSd == None:
geocodeList = self._insar.multilookCoherenceSd + self._insar.azimuthDeformationSd + self._insar.maskedAzimuthDeformationSd
else:
geocodeList = self.geocodeListSd
geocodeList = []
for xxx in self.geocodeListSd:
geocodeList += glob.glob(xxx)
if self.bbox == None:
bbox = getBboxGeo(masterTrack)

42
components/isceobj/Alos2burstProc/runIonSubband.py
View File

@ -252,18 +252,56 @@ def runIonSubband(self):
#list of input files
inputInterferograms = []
inputAmplitudes = []
phaseDiff = [None]
for j, swathNumber in enumerate(range(self._insar.startingSwath, self._insar.endingSwath + 1)):
swathDir = 's{}'.format(swathNumber)
inputInterferograms.append(os.path.join('../', swathDir, self._insar.interferogram))
inputAmplitudes.append(os.path.join('../', swathDir, self._insar.amplitude))
#compute phase needed to be compensated using startingRange
if j >= 1:
#phaseDiffSwath1 = -4.0 * np.pi * (masterTrack.frames[i].swaths[j-1].startingRange - slaveTrack.frames[i].swaths[j-1].startingRange)/subbandRadarWavelength[k]
#phaseDiffSwath2 = -4.0 * np.pi * (masterTrack.frames[i].swaths[j].startingRange - slaveTrack.frames[i].swaths[j].startingRange)/subbandRadarWavelength[k]
phaseDiffSwath1 = +4.0 * np.pi * masterTrack.frames[i].swaths[j-1].startingRange * (1.0/radarWavelength - 1.0/subbandRadarWavelength[k]) \
-4.0 * np.pi * slaveTrack.frames[i].swaths[j-1].startingRange * (1.0/radarWavelength - 1.0/subbandRadarWavelength[k])
phaseDiffSwath2 = +4.0 * np.pi * masterTrack.frames[i].swaths[j].startingRange * (1.0/radarWavelength - 1.0/subbandRadarWavelength[k]) \
-4.0 * np.pi * slaveTrack.frames[i].swaths[j].startingRange * (1.0/radarWavelength - 1.0/subbandRadarWavelength[k])
if masterTrack.frames[i].swaths[j-1].startingRange - slaveTrack.frames[i].swaths[j-1].startingRange == \
masterTrack.frames[i].swaths[j].startingRange - slaveTrack.frames[i].swaths[j].startingRange:
#phaseDiff.append(phaseDiffSwath2 - phaseDiffSwath1)
#if master and slave versions are all before or after version 2.025 (starting range error < 0.5 m),
#it should be OK to do the above.
#see results in neom where it meets the above requirement, but there is still phase diff
#to be less risky, we do not input values here
phaseDiff.append(None)
else:
phaseDiff.append(None)
#note that frame parameters are updated after mosaicking
#mosaic amplitudes
swathMosaic(masterTrack.frames[i], inputAmplitudes, self._insar.amplitude,
rangeOffsets, azimuthOffsets, self._insar.numberRangeLooks1, self._insar.numberAzimuthLooks1, resamplingMethod=0)
#mosaic interferograms
swathMosaic(masterTrack.frames[i], inputInterferograms, self._insar.interferogram,
rangeOffsets, azimuthOffsets, self._insar.numberRangeLooks1, self._insar.numberAzimuthLooks1, updateFrame=False, phaseCompensation=True, resamplingMethod=1)
#These are for ALOS-2, may need to change for ALOS-4!
phaseDiffFixed = [0.0, 0.4754024578084084, 0.9509913179406437, 1.4261648478671614, 2.179664007520499, 2.6766909968024932, 3.130810857]
snapThreshold = 0.2
(phaseDiffEst, phaseDiffUsed, phaseDiffSource) = swathMosaic(masterTrack.frames[i], inputInterferograms, self._insar.interferogram,
rangeOffsets, azimuthOffsets, self._insar.numberRangeLooks1, self._insar.numberAzimuthLooks1, updateFrame=False,
phaseCompensation=True, phaseDiff=phaseDiff, phaseDiffFixed=phaseDiffFixed, snapThreshold=snapThreshold, pcRangeLooks=1, pcAzimuthLooks=3,
filt=False, resamplingMethod=1)
#the first item is meaningless for all the following list, so only record the following items
catalog.addItem('{} subswath phase difference input'.format(ionDir['subband'][k]), phaseDiff[1:], 'runIonSubband')
catalog.addItem('{} subswath phase difference estimated'.format(ionDir['subband'][k]), phaseDiffEst[1:], 'runIonSubband')
catalog.addItem('{} subswath phase difference used'.format(ionDir['subband'][k]), phaseDiffUsed[1:], 'runIonSubband')
catalog.addItem('{} subswath phase difference used source'.format(ionDir['subband'][k]), phaseDiffSource[1:], 'runIonSubband')
#check if there is value around 3.130810857, which may not be stable
phaseDiffUnstableExist = False
for xxx in phaseDiffUsed:
if abs(abs(xxx) - 3.130810857) < 0.2:
phaseDiffUnstableExist = True
catalog.addItem('{} subswath phase difference unstable exists'.format(ionDir['subband'][k]), phaseDiffUnstableExist, 'runIonSubband')
create_xml(self._insar.amplitude, masterTrack.frames[i].numberOfSamples, masterTrack.frames[i].numberOfLines, 'amp')
create_xml(self._insar.interferogram, masterTrack.frames[i].numberOfSamples, masterTrack.frames[i].numberOfLines, 'int')