def computeBaseline(trackReference, trackSecondary, azimuthTime,
rangeDistance):
import numpy as np
from isceobj.Planet.Planet import Planet
#modify Piyush's code for computing baslines
refElp = Planet(pname='Earth').ellipsoid
#for x in points:
referenceSV = trackReference.orbit.interpolate(azimuthTime,
method='hermite')
target = trackReference.orbit.rdr2geo(azimuthTime, rangeDistance)
slvTime, slvrng = trackSecondary.orbit.geo2rdr(target)
secondarySV = trackSecondary.orbit.interpolateOrbit(slvTime,
method='hermite')
targxyz = np.array(
refElp.LLH(target[0], target[1], target[2]).ecef().tolist())
mxyz = np.array(referenceSV.getPosition())
mvel = np.array(referenceSV.getVelocity())
sxyz = np.array(secondarySV.getPosition())
#to fix abrupt change near zero in baseline grid. JUN-05-2020
mvelunit = mvel / np.linalg.norm(mvel)
sxyz = sxyz - np.dot(sxyz - mxyz, mvelunit) * mvelunit
aa = np.linalg.norm(sxyz - mxyz)
costheta = (rangeDistance * rangeDistance + aa * aa -
slvrng * slvrng) / (2. * rangeDistance * aa)
Bpar = aa * costheta
perp = aa * np.sqrt(1 - costheta * costheta)
direction = np.sign(np.dot(np.cross(targxyz - mxyz, sxyz - mxyz), mvel))
Bperp = direction * perp
return (Bpar, Bperp)
def runPreprocessor(self):
'''Extract images.
'''
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
#find files
#actually no need to use absolute path any longer, since we are able to find file from vrt now. 27-JAN-2020, CRL.
#denseoffset may still need absolute path when making links
self.masterDir = os.path.abspath(self.masterDir)
self.slaveDir = os.path.abspath(self.slaveDir)
ledFilesMaster = sorted(glob.glob(os.path.join(self.masterDir, 'LED-ALOS2*-*-*')))
imgFilesMaster = sorted(glob.glob(os.path.join(self.masterDir, 'IMG-{}-ALOS2*-*-*'.format(self.masterPolarization.upper()))))
ledFilesSlave = sorted(glob.glob(os.path.join(self.slaveDir, 'LED-ALOS2*-*-*')))
imgFilesSlave = sorted(glob.glob(os.path.join(self.slaveDir, 'IMG-{}-ALOS2*-*-*'.format(self.slavePolarization.upper()))))
firstFrameMaster = ledFilesMaster[0].split('-')[-3][-4:]
firstFrameSlave = ledFilesSlave[0].split('-')[-3][-4:]
firstFrameImagesMaster = sorted(glob.glob(os.path.join(self.masterDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.masterPolarization.upper(), firstFrameMaster))))
firstFrameImagesSlave = sorted(glob.glob(os.path.join(self.slaveDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.slavePolarization.upper(), firstFrameSlave))))
#determin operation mode
masterMode = os.path.basename(ledFilesMaster[0]).split('-')[-1][0:3]
slaveMode = os.path.basename(ledFilesSlave[0]).split('-')[-1][0:3]
spotlightModes = ['SBS']
stripmapModes = ['UBS', 'UBD', 'HBS', 'HBD', 'HBQ', 'FBS', 'FBD', 'FBQ']
scansarNominalModes = ['WBS', 'WBD', 'WWS', 'WWD']
scansarWideModes = ['VBS', 'VBD']
scansarModes = ['WBS', 'WBD', 'WWS', 'WWD', 'VBS', 'VBD']
#usable combinations
if (masterMode in spotlightModes) and (slaveMode in spotlightModes):
self._insar.modeCombination = 0
elif (masterMode in stripmapModes) and (slaveMode in stripmapModes):
self._insar.modeCombination = 1
elif (masterMode in scansarNominalModes) and (slaveMode in scansarNominalModes):
self._insar.modeCombination = 21
elif (masterMode in scansarWideModes) and (slaveMode in scansarWideModes):
self._insar.modeCombination = 22
elif (masterMode in scansarNominalModes) and (slaveMode in stripmapModes):
self._insar.modeCombination = 31
elif (masterMode in scansarWideModes) and (slaveMode in stripmapModes):
self._insar.modeCombination = 32
else:
print('\n\nthis mode combination is not possible')
print('note that for ScanSAR-stripmap, ScanSAR must be master\n\n')
raise Exception('mode combination not supported')
if self._insar.modeCombination != 21:
print('\n\nburst processing only support {}\n\n'.format(scansarNominalModes))
raise Exception('mode combination not supported')
#determine default number of looks:
self._insar.numberRangeLooks1 = self.numberRangeLooks1
self._insar.numberAzimuthLooks1 = self.numberAzimuthLooks1
self._insar.numberRangeLooks2 = self.numberRangeLooks2
self._insar.numberAzimuthLooks2 = self.numberAzimuthLooks2
#the following two will be automatically determined by runRdrDemOffset.py
self._insar.numberRangeLooksSim = self.numberRangeLooksSim
self._insar.numberAzimuthLooksSim = self.numberAzimuthLooksSim
self._insar.numberRangeLooksIon = self.numberRangeLooksIon
self._insar.numberAzimuthLooksIon = self.numberAzimuthLooksIon
self._insar.numberRangeLooksSd = self.numberRangeLooksSd
self._insar.numberAzimuthLooksSd = self.numberAzimuthLooksSd
#force number of looks 1 to 1
self.numberRangeLooks1 = 1
self.numberAzimuthLooks1 = 1
self._insar.numberRangeLooks1 = 1
self._insar.numberAzimuthLooks1 = 1
if self._insar.numberRangeLooks2 == None:
self._insar.numberRangeLooks2 = 7
if self._insar.numberAzimuthLooks2 == None:
self._insar.numberAzimuthLooks2 = 2
if self._insar.numberRangeLooksIon == None:
self._insar.numberRangeLooksIon = 42
if self._insar.numberAzimuthLooksIon == None:
self._insar.numberAzimuthLooksIon = 12
if self._insar.numberRangeLooksSd == None:
self._insar.numberRangeLooksSd = 14
if self._insar.numberAzimuthLooksSd == None:
self._insar.numberAzimuthLooksSd = 4
#define processing file names
self._insar.masterDate = os.path.basename(ledFilesMaster[0]).split('-')[2]
self._insar.slaveDate = os.path.basename(ledFilesSlave[0]).split('-')[2]
self._insar.setFilename(masterDate=self._insar.masterDate, slaveDate=self._insar.slaveDate,
nrlks1=self._insar.numberRangeLooks1, nalks1=self._insar.numberAzimuthLooks1,
nrlks2=self._insar.numberRangeLooks2, nalks2=self._insar.numberAzimuthLooks2)
self._insar.setFilenameSd(masterDate=self._insar.masterDate, slaveDate=self._insar.slaveDate,
nrlks1=self._insar.numberRangeLooks1, nalks1=self._insar.numberAzimuthLooks1,
nrlks_sd=self._insar.numberRangeLooksSd, nalks_sd=self._insar.numberAzimuthLooksSd, nsd=3)
#find frame numbers
if (self._insar.modeCombination == 31) or (self._insar.modeCombination == 32):
if (self.masterFrames == None) or (self.slaveFrames == None):
raise Exception('for ScanSAR-stripmap inteferometry, you must set master and slave frame numbers')
#if not set, find frames automatically
if self.masterFrames == None:
self.masterFrames = []
for led in ledFilesMaster:
frameNumber = os.path.basename(led).split('-')[1][-4:]
if frameNumber not in self.masterFrames:
self.masterFrames.append(frameNumber)
if self.slaveFrames == None:
self.slaveFrames = []
for led in ledFilesSlave:
frameNumber = os.path.basename(led).split('-')[1][-4:]
if frameNumber not in self.slaveFrames:
self.slaveFrames.append(frameNumber)
#sort frames
self.masterFrames = sorted(self.masterFrames)
self.slaveFrames = sorted(self.slaveFrames)
#check number of frames
if len(self.masterFrames) != len(self.slaveFrames):
raise Exception('number of frames in master dir is not equal to number of frames \
in slave dir. please set frame number manually')
#find swath numbers (if not ScanSAR-ScanSAR, compute valid swaths)
if (self._insar.modeCombination == 0) or (self._insar.modeCombination == 1):
self.startingSwath = 1
self.endingSwath = 1
if self._insar.modeCombination == 21:
if self.startingSwath == None:
self.startingSwath = 1
if self.endingSwath == None:
self.endingSwath = 5
if self._insar.modeCombination == 22:
if self.startingSwath == None:
self.startingSwath = 1
if self.endingSwath == None:
self.endingSwath = 7
#determine starting and ending swaths for ScanSAR-stripmap, user's settings are overwritten
#use first frame to check overlap
if (self._insar.modeCombination == 31) or (self._insar.modeCombination == 32):
if self._insar.modeCombination == 31:
numberOfSwaths = 5
else:
numberOfSwaths = 7
overlapSubswaths = []
for i in range(numberOfSwaths):
overlapRatio = check_overlap(ledFilesMaster[0], firstFrameImagesMaster[i], ledFilesSlave[0], firstFrameImagesSlave[0])
if overlapRatio > 1.0 / 4.0:
overlapSubswaths.append(i+1)
if overlapSubswaths == []:
raise Exception('There is no overlap area between the ScanSAR-stripmap pair')
self.startingSwath = int(overlapSubswaths[0])
self.endingSwath = int(overlapSubswaths[-1])
#save the valid frames and swaths for future processing
self._insar.masterFrames = self.masterFrames
self._insar.slaveFrames = self.slaveFrames
self._insar.startingSwath = self.startingSwath
self._insar.endingSwath = self.endingSwath
##################################################
#1. create directories and read data
##################################################
self.master.configure()
self.slave.configure()
self.master.track.configure()
self.slave.track.configure()
for i, (masterFrame, slaveFrame) in enumerate(zip(self._insar.masterFrames, self._insar.slaveFrames)):
#frame number starts with 1
frameDir = 'f{}_{}'.format(i+1, masterFrame)
if not os.path.exists(frameDir):
os.makedirs(frameDir)
os.chdir(frameDir)
#attach a frame to master and slave
frameObjMaster = MultiMode.createFrame()
frameObjSlave = MultiMode.createFrame()
frameObjMaster.configure()
frameObjSlave.configure()
self.master.track.frames.append(frameObjMaster)
self.slave.track.frames.append(frameObjSlave)
#swath number starts with 1
for j in range(self._insar.startingSwath, self._insar.endingSwath+1):
print('processing frame {} swath {}'.format(masterFrame, j))
swathDir = 's{}'.format(j)
if not os.path.exists(swathDir):
os.makedirs(swathDir)
os.chdir(swathDir)
#attach a swath to master and slave
swathObjMaster = MultiMode.createSwath()
swathObjSlave = MultiMode.createSwath()
swathObjMaster.configure()
swathObjSlave.configure()
self.master.track.frames[-1].swaths.append(swathObjMaster)
self.slave.track.frames[-1].swaths.append(swathObjSlave)
#setup master
self.master.leaderFile = sorted(glob.glob(os.path.join(self.masterDir, 'LED-ALOS2*{}-*-*'.format(masterFrame))))[0]
if masterMode in scansarModes:
self.master.imageFile = sorted(glob.glob(os.path.join(self.masterDir, 'IMG-{}-ALOS2*{}-*-*-F{}'.format(self.masterPolarization.upper(), masterFrame, j))))[0]
else:
self.master.imageFile = sorted(glob.glob(os.path.join(self.masterDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.masterPolarization.upper(), masterFrame))))[0]
self.master.outputFile = self._insar.masterSlc
self.master.useVirtualFile = self.useVirtualFile
#read master
(imageFDR, imageData)=self.master.readImage()
(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord)=self.master.readLeader()
self.master.setSwath(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.master.setFrame(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.master.setTrack(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
#setup slave
self.slave.leaderFile = sorted(glob.glob(os.path.join(self.slaveDir, 'LED-ALOS2*{}-*-*'.format(slaveFrame))))[0]
if slaveMode in scansarModes:
self.slave.imageFile = sorted(glob.glob(os.path.join(self.slaveDir, 'IMG-{}-ALOS2*{}-*-*-F{}'.format(self.slavePolarization.upper(), slaveFrame, j))))[0]
else:
self.slave.imageFile = sorted(glob.glob(os.path.join(self.slaveDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.slavePolarization.upper(), slaveFrame))))[0]
self.slave.outputFile = self._insar.slaveSlc
self.slave.useVirtualFile = self.useVirtualFile
#read slave
(imageFDR, imageData)=self.slave.readImage()
(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord)=self.slave.readLeader()
self.slave.setSwath(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.slave.setFrame(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.slave.setTrack(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
os.chdir('../')
self._insar.saveProduct(self.master.track.frames[-1], self._insar.masterFrameParameter)
self._insar.saveProduct(self.slave.track.frames[-1], self._insar.slaveFrameParameter)
os.chdir('../')
self._insar.saveProduct(self.master.track, self._insar.masterTrackParameter)
self._insar.saveProduct(self.slave.track, self._insar.slaveTrackParameter)
##################################################
#2. compute burst synchronization
##################################################
#burst synchronization may slowly change along a track as a result of the changing relative speed of the two flights
#in one frame, real unsynchronized time is the same for all swaths
unsynTime = 0
#real synchronized time/percentage depends on the swath burst length (synTime = burstlength - abs(unsynTime))
#synTime = 0
synPercentage = 0
numberOfFrames = len(self._insar.masterFrames)
numberOfSwaths = self._insar.endingSwath - self._insar.startingSwath + 1
for i, frameNumber in enumerate(self._insar.masterFrames):
for j, swathNumber in enumerate(range(self._insar.startingSwath, self._insar.endingSwath + 1)):
masterSwath = self.master.track.frames[i].swaths[j]
slaveSwath = self.slave.track.frames[i].swaths[j]
#using Piyush's code for computing range and azimuth offsets
midRange = masterSwath.startingRange + masterSwath.rangePixelSize * masterSwath.numberOfSamples * 0.5
midSensingStart = masterSwath.sensingStart + datetime.timedelta(seconds = masterSwath.numberOfLines * 0.5 / masterSwath.prf)
llh = self.master.track.orbit.rdr2geo(midSensingStart, midRange)
slvaz, slvrng = self.slave.track.orbit.geo2rdr(llh)
###Translate to offsets
#note that slave range pixel size and prf might be different from master, here we assume there is a virtual slave with same
#range pixel size and prf
rgoff = ((slvrng - slaveSwath.startingRange) / masterSwath.rangePixelSize) - masterSwath.numberOfSamples * 0.5
azoff = ((slvaz - slaveSwath.sensingStart).total_seconds() * masterSwath.prf) - masterSwath.numberOfLines * 0.5
#compute burst synchronization
#burst parameters for ScanSAR wide mode not estimed yet
if self._insar.modeCombination == 21:
scburstStartLine = (masterSwath.burstStartTime - masterSwath.sensingStart).total_seconds() * masterSwath.prf + azoff
#slave burst start times corresponding to master burst start times (100% synchronization)
scburstStartLines = np.arange(scburstStartLine - 100000*masterSwath.burstCycleLength, \
scburstStartLine + 100000*masterSwath.burstCycleLength, \
masterSwath.burstCycleLength)
dscburstStartLines = -((slaveSwath.burstStartTime - slaveSwath.sensingStart).total_seconds() * slaveSwath.prf - scburstStartLines)
#find the difference with minimum absolute value
unsynLines = dscburstStartLines[np.argmin(np.absolute(dscburstStartLines))]
if np.absolute(unsynLines) >= slaveSwath.burstLength:
synLines = 0
if unsynLines > 0:
unsynLines = slaveSwath.burstLength
else:
unsynLines = -slaveSwath.burstLength
else:
synLines = slaveSwath.burstLength - np.absolute(unsynLines)
unsynTime += unsynLines / masterSwath.prf
synPercentage += synLines / masterSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(synLines / masterSwath.burstLength * 100.0), 'runPreprocessor')
############################################################################################
#illustration of the sign of the number of unsynchronized lines (unsynLines)
#The convention is the same as ampcor offset, that is,
# slaveLineNumber = masterLineNumber + unsynLines
#
# |-----------------------| ------------
# | | ^
# | | |
# | | | unsynLines < 0
# | | |
# | | \ /
# | | |-----------------------|
# | | | |
# | | | |
# |-----------------------| | |
# Master Burst | |
# | |
# | |
# | |
# | |
# |-----------------------|
# Slave Burst
#
#
############################################################################################
##burst parameters for ScanSAR wide mode not estimed yet
elif self._insar.modeCombination == 31:
#scansar is master
scburstStartLine = (masterSwath.burstStartTime - masterSwath.sensingStart).total_seconds() * masterSwath.prf + azoff
#slave burst start times corresponding to master burst start times (100% synchronization)
for k in range(-100000, 100000):
saz_burstx = scburstStartLine + masterSwath.burstCycleLength * k
st_burstx = slaveSwath.sensingStart + datetime.timedelta(seconds=saz_burstx / masterSwath.prf)
if saz_burstx >= 0.0 and saz_burstx <= slaveSwath.numberOfLines -1:
slaveSwath.burstStartTime = st_burstx
slaveSwath.burstLength = masterSwath.burstLength
slaveSwath.burstCycleLength = masterSwath.burstCycleLength
slaveSwath.swathNumber = masterSwath.swathNumber
break
#unsynLines = 0
#synLines = masterSwath.burstLength
#unsynTime += unsynLines / masterSwath.prf
#synPercentage += synLines / masterSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(100.0), 'runPreprocessor')
else:
pass
#overwrite original frame parameter file
if self._insar.modeCombination == 31:
frameDir = 'f{}_{}'.format(i+1, frameNumber)
self._insar.saveProduct(self.slave.track.frames[i], os.path.join(frameDir, self._insar.slaveFrameParameter))
#getting average
if self._insar.modeCombination == 21:
unsynTime /= numberOfFrames*numberOfSwaths
synPercentage /= numberOfFrames*numberOfSwaths
elif self._insar.modeCombination == 31:
unsynTime = 0.
synPercentage = 100.
else:
pass
#record results
if (self._insar.modeCombination == 21) or (self._insar.modeCombination == 31):
self._insar.burstUnsynchronizedTime = unsynTime
self._insar.burstSynchronization = synPercentage
catalog.addItem('burst synchronization averaged', '%.1f%%'%(synPercentage), 'runPreprocessor')
##################################################
#3. compute baseline
##################################################
#only compute baseline at four corners and center of the master track
bboxRdr = getBboxRdr(self.master.track)
rangeMin = bboxRdr[0]
rangeMax = bboxRdr[1]
azimuthTimeMin = bboxRdr[2]
azimuthTimeMax = bboxRdr[3]
azimuthTimeMid = azimuthTimeMin+datetime.timedelta(seconds=(azimuthTimeMax-azimuthTimeMin).total_seconds()/2.0)
rangeMid = (rangeMin + rangeMax) / 2.0
points = [[azimuthTimeMin, rangeMin],
[azimuthTimeMin, rangeMax],
[azimuthTimeMax, rangeMin],
[azimuthTimeMax, rangeMax],
[azimuthTimeMid, rangeMid]]
Bpar = []
Bperp = []
#modify Piyush's code for computing baslines
refElp = Planet(pname='Earth').ellipsoid
for x in points:
masterSV = self.master.track.orbit.interpolate(x[0], method='hermite')
target = self.master.track.orbit.rdr2geo(x[0], x[1])
slvTime, slvrng = self.slave.track.orbit.geo2rdr(target)
slaveSV = self.slave.track.orbit.interpolateOrbit(slvTime, method='hermite')
targxyz = np.array(refElp.LLH(target[0], target[1], target[2]).ecef().tolist())
mxyz = np.array(masterSV.getPosition())
mvel = np.array(masterSV.getVelocity())
sxyz = np.array(slaveSV.getPosition())
aa = np.linalg.norm(sxyz-mxyz)
costheta = (x[1]*x[1] + aa*aa - slvrng*slvrng)/(2.*x[1]*aa)
Bpar.append(aa*costheta)
perp = aa * np.sqrt(1 - costheta*costheta)
direction = np.sign(np.dot( np.cross(targxyz-mxyz, sxyz-mxyz), mvel))
Bperp.append(direction*perp)
catalog.addItem('parallel baseline at upperleft of master track', Bpar[0], 'runPreprocessor')
catalog.addItem('parallel baseline at upperright of master track', Bpar[1], 'runPreprocessor')
catalog.addItem('parallel baseline at lowerleft of master track', Bpar[2], 'runPreprocessor')
catalog.addItem('parallel baseline at lowerright of master track', Bpar[3], 'runPreprocessor')
catalog.addItem('parallel baseline at center of master track', Bpar[4], 'runPreprocessor')
catalog.addItem('perpendicular baseline at upperleft of master track', Bperp[0], 'runPreprocessor')
catalog.addItem('perpendicular baseline at upperright of master track', Bperp[1], 'runPreprocessor')
catalog.addItem('perpendicular baseline at lowerleft of master track', Bperp[2], 'runPreprocessor')
catalog.addItem('perpendicular baseline at lowerright of master track', Bperp[3], 'runPreprocessor')
catalog.addItem('perpendicular baseline at center of master track', Bperp[4], 'runPreprocessor')
##################################################
#4. compute bounding box
##################################################
masterBbox = getBboxGeo(self.master.track)
slaveBbox = getBboxGeo(self.slave.track)
catalog.addItem('master bounding box', masterBbox, 'runPreprocessor')
catalog.addItem('slave bounding box', slaveBbox, 'runPreprocessor')
catalog.printToLog(logger, "runPreprocessor")
self._insar.procDoc.addAllFromCatalog(catalog)
def main(iargs=None):
'''Compute baseline.
'''
inps = cmdLineParse(iargs)
from isceobj.Planet.Planet import Planet
import numpy as np
referenceSwathList = ut.getSwathList(inps.reference)
secondarySwathList = ut.getSwathList(inps.secondary)
swathList = list(sorted(set(referenceSwathList + secondarySwathList)))
#catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
baselineDir = os.path.dirname(inps.baselineFile)
if baselineDir != '':
os.makedirs(baselineDir, exist_ok=True)
referenceswaths = []
secondaryswaths = []
for swath in swathList:
referencexml = os.path.join(inps.reference, 'IW{0}.xml'.format(swath))
secondaryxml = os.path.join(inps.secondary, 'IW{0}.xml'.format(swath))
if os.path.exists(referencexml) and os.path.exists(secondaryxml):
reference = ut.loadProduct(
os.path.join(inps.reference, 'IW{0}.xml'.format(swath)))
secondary = ut.loadProduct(
os.path.join(inps.secondary, 'IW{0}.xml'.format(swath)))
referenceswaths.append(reference)
secondaryswaths.append(secondary)
refElp = Planet(pname='Earth').ellipsoid
mStartingRange = min([x.startingRange for x in referenceswaths])
mFarRange = max([x.farRange for x in referenceswaths])
mSensingStart = min([x.sensingStart for x in referenceswaths])
mSensingStop = max([x.sensingStop for x in referenceswaths])
mOrb = getMergedOrbit(referenceswaths)
dr = referenceswaths[0].bursts[0].rangePixelSize
dt = referenceswaths[0].bursts[0].azimuthTimeInterval
nPixels = int(np.round((mFarRange - mStartingRange) / dr)) + 1
nLines = int(np.round(
(mSensingStop - mSensingStart).total_seconds() / dt)) + 1
sOrb = getMergedOrbit(secondaryswaths)
rangeLimits = mFarRange - mStartingRange
nRange = int(np.ceil(rangeLimits / 7000.))
slantRange = mStartingRange + np.arange(nRange) * rangeLimits / (nRange -
1.0)
azimuthLimits = (mSensingStop - mSensingStart).total_seconds()
nAzimuth = int(np.ceil(azimuthLimits))
azimuthTime = [
mSensingStart + datetime.timedelta(seconds=x * azimuthLimits /
(nAzimuth - 1.0))
for x in range(nAzimuth)
]
Bpar = np.zeros(nRange, dtype=np.float32)
Bperp = np.zeros(nRange, dtype=np.float32)
fid = open(inps.baselineFile, 'wb')
print('Baseline file {0} dims: {1}L x {2}P'.format(inps.baselineFile,
nAzimuth, nRange))
if inps.reference == inps.secondary:
Bperp = np.zeros((nAzimuth, nRange), dtype=np.float32)
Bperp.tofile(fid)
else:
for ii, taz in enumerate(azimuthTime):
referenceSV = mOrb.interpolate(taz, method='hermite')
mxyz = np.array(referenceSV.getPosition())
mvel = np.array(referenceSV.getVelocity())
for jj, rng in enumerate(slantRange):
target = mOrb.rdr2geo(taz, rng)
targxyz = np.array(
refElp.LLH(target[0], target[1],
target[2]).ecef().tolist())
slvTime, slvrng = sOrb.geo2rdr(target)
secondarySV = sOrb.interpolateOrbit(slvTime, method='hermite')
sxyz = np.array(secondarySV.getPosition())
aa = np.linalg.norm(sxyz - mxyz)
costheta = (rng * rng + aa * aa - slvrng * slvrng) / (2. *
rng * aa)
Bpar[jj] = aa * costheta
perp = aa * np.sqrt(1 - costheta * costheta)
direction = np.sign(
np.dot(np.cross(targxyz - mxyz, sxyz - mxyz), mvel))
Bperp[jj] = direction * perp
Bperp.tofile(fid)
fid.close()
####Write XML
img = isceobj.createImage()
img.setFilename(inps.baselineFile)
img.bands = 1
img.scheme = 'BIP'
img.dataType = 'FLOAT'
img.setWidth(nRange)
img.setAccessMode('READ')
img.setLength(nAzimuth)
img.renderHdr()
img.renderVRT()
###Create oversampled VRT file
cmd = 'gdal_translate -of VRT -ot Float32 -r bilinear -outsize {xsize} {ysize} {infile}.vrt {infile}.full.vrt'.format(
xsize=nPixels, ysize=nLines, infile=inps.baselineFile)
status = os.system(cmd)
if status:
raise Exception('cmd: {0} Failed'.format(cmd))
def main(iargs=None):
'''Compute baseline.
'''
inps = cmdLineParse(iargs)
from isceobj.Planet.Planet import Planet
import numpy as np
import shelve
baselineDir = os.path.dirname(inps.baselineFile)
if baselineDir != '':
os.makedirs(baselineDir, exist_ok=True)
with shelve.open(os.path.join(inps.reference, 'data'), flag='r') as mdb:
reference = mdb['frame']
with shelve.open(os.path.join(inps.secondary, 'data'), flag='r') as mdb:
secondary = mdb['frame']
# check if the reference and secondary shelf are the same, i.e. it is baseline grid for the reference
reference_SensingStart = reference.getSensingStart()
secondary_SensingStart = secondary.getSensingStart()
if reference_SensingStart == secondary_SensingStart:
referenceBaseline = True
else:
referenceBaseline = False
refElp = Planet(pname='Earth').ellipsoid
dr = reference.instrument.rangePixelSize
dt = 1. / reference.PRF #reference.azimuthTimeInterval
mStartingRange = reference.startingRange #min([x.startingRange for x in referenceswaths])
mFarRange = reference.startingRange + dr * (
reference.numberOfSamples - 1
) #max([x.farRange for x in referenceswaths])
mSensingStart = reference.sensingStart # min([x.sensingStart for x in referenceswaths])
mSensingStop = reference.sensingStop #max([x.sensingStop for x in referenceswaths])
mOrb = getMergedOrbit(reference)
nPixels = int(np.round((mFarRange - mStartingRange) / dr)) + 1
nLines = int(np.round(
(mSensingStop - mSensingStart).total_seconds() / dt)) + 1
sOrb = getMergedOrbit(secondary)
rangeLimits = mFarRange - mStartingRange
# To make sure that we have at least 30 points
nRange = int(np.max([30, int(np.ceil(rangeLimits / 7000.))]))
slantRange = mStartingRange + np.arange(nRange) * rangeLimits / (nRange -
1.0)
azimuthLimits = (mSensingStop - mSensingStart).total_seconds()
nAzimuth = int(np.max([30, int(np.ceil(azimuthLimits))]))
azimuthTime = [
mSensingStart + datetime.timedelta(seconds=x * azimuthLimits /
(nAzimuth - 1.0))
for x in range(nAzimuth)
]
Bperp = np.zeros((nAzimuth, nRange), dtype=np.float32)
Bpar = np.zeros((nAzimuth, nRange), dtype=np.float32)
fid = open(inps.baselineFile, 'wb')
print('Baseline file {0} dims: {1}L x {2}P'.format(inps.baselineFile,
nAzimuth, nRange))
if referenceBaseline:
Bperp = np.zeros((nAzimuth, nRange), dtype=np.float32)
Bperp.tofile(fid)
else:
for ii, taz in enumerate(azimuthTime):
referenceSV = mOrb.interpolate(taz, method='hermite')
mxyz = np.array(referenceSV.getPosition())
mvel = np.array(referenceSV.getVelocity())
for jj, rng in enumerate(slantRange):
target = mOrb.rdr2geo(taz, rng)
targxyz = np.array(
refElp.LLH(target[0], target[1],
target[2]).ecef().tolist())
slvTime, slvrng = sOrb.geo2rdr(target)
secondarySV = sOrb.interpolateOrbit(slvTime, method='hermite')
sxyz = np.array(secondarySV.getPosition())
aa = np.linalg.norm(sxyz - mxyz)
costheta = (rng * rng + aa * aa - slvrng * slvrng) / (2. *
rng * aa)
Bpar[ii, jj] = aa * costheta
perp = aa * np.sqrt(1 - costheta * costheta)
direction = np.sign(
np.dot(np.cross(targxyz - mxyz, sxyz - mxyz), mvel))
Bperp[ii, jj] = direction * perp
Bperp.tofile(fid)
fid.close()
####Write XML
img = isceobj.createImage()
img.setFilename(inps.baselineFile)
img.bands = 1
img.scheme = 'BIP'
img.dataType = 'FLOAT'
img.setWidth(nRange)
img.setAccessMode('READ')
img.setLength(nAzimuth)
img.renderHdr()
img.renderVRT()
###Create oversampled VRT file
cmd = 'gdal_translate -of VRT -ot Float32 -r bilinear -outsize {xsize} {ysize} {infile}.vrt {infile}.full.vrt'.format(
xsize=nPixels, ysize=nLines, infile=inps.baselineFile)
status = os.system(cmd)
if status:
raise Exception('cmd: {0} Failed'.format(cmd))
def runBaseline(self):
'''compute baseline
'''
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
self.updateParamemetersFromUser()
referenceTrack = self._insar.loadTrack(reference=True)
secondaryTrack = self._insar.loadTrack(reference=False)
##################################################
#2. compute burst synchronization
##################################################
#burst synchronization may slowly change along a track as a result of the changing relative speed of the two flights
#in one frame, real unsynchronized time is the same for all swaths
unsynTime = 0
#real synchronized time/percentage depends on the swath burst length (synTime = burstlength - abs(unsynTime))
#synTime = 0
synPercentage = 0
numberOfFrames = len(self._insar.referenceFrames)
numberOfSwaths = self._insar.endingSwath - self._insar.startingSwath + 1
for i, frameNumber in enumerate(self._insar.referenceFrames):
for j, swathNumber in enumerate(range(self._insar.startingSwath, self._insar.endingSwath + 1)):
referenceSwath = referenceTrack.frames[i].swaths[j]
secondarySwath = secondaryTrack.frames[i].swaths[j]
#using Piyush's code for computing range and azimuth offsets
midRange = referenceSwath.startingRange + referenceSwath.rangePixelSize * referenceSwath.numberOfSamples * 0.5
midSensingStart = referenceSwath.sensingStart + datetime.timedelta(seconds = referenceSwath.numberOfLines * 0.5 / referenceSwath.prf)
llh = referenceTrack.orbit.rdr2geo(midSensingStart, midRange)
slvaz, slvrng = secondaryTrack.orbit.geo2rdr(llh)
###Translate to offsets
#note that secondary range pixel size and prf might be different from reference, here we assume there is a virtual secondary with same
#range pixel size and prf
rgoff = ((slvrng - secondarySwath.startingRange) / referenceSwath.rangePixelSize) - referenceSwath.numberOfSamples * 0.5
azoff = ((slvaz - secondarySwath.sensingStart).total_seconds() * referenceSwath.prf) - referenceSwath.numberOfLines * 0.5
#compute burst synchronization
#burst parameters for ScanSAR wide mode not estimed yet
if self._insar.modeCombination == 21:
scburstStartLine = (referenceSwath.burstStartTime - referenceSwath.sensingStart).total_seconds() * referenceSwath.prf + azoff
#secondary burst start times corresponding to reference burst start times (100% synchronization)
scburstStartLines = np.arange(scburstStartLine - 100000*referenceSwath.burstCycleLength, \
scburstStartLine + 100000*referenceSwath.burstCycleLength, \
referenceSwath.burstCycleLength)
dscburstStartLines = -((secondarySwath.burstStartTime - secondarySwath.sensingStart).total_seconds() * secondarySwath.prf - scburstStartLines)
#find the difference with minimum absolute value
unsynLines = dscburstStartLines[np.argmin(np.absolute(dscburstStartLines))]
if np.absolute(unsynLines) >= secondarySwath.burstLength:
synLines = 0
if unsynLines > 0:
unsynLines = secondarySwath.burstLength
else:
unsynLines = -secondarySwath.burstLength
else:
synLines = secondarySwath.burstLength - np.absolute(unsynLines)
unsynTime += unsynLines / referenceSwath.prf
synPercentage += synLines / referenceSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(synLines / referenceSwath.burstLength * 100.0), 'runBaseline')
############################################################################################
#illustration of the sign of the number of unsynchronized lines (unsynLines)
#The convention is the same as ampcor offset, that is,
# secondaryLineNumber = referenceLineNumber + unsynLines
#
# |-----------------------| ------------
# | | ^
# | | |
# | | | unsynLines < 0
# | | |
# | | \ /
# | | |-----------------------|
# | | | |
# | | | |
# |-----------------------| | |
# Reference Burst | |
# | |
# | |
# | |
# | |
# |-----------------------|
# Secondary Burst
#
#
############################################################################################
##burst parameters for ScanSAR wide mode not estimed yet
elif self._insar.modeCombination == 31:
#scansar is reference
scburstStartLine = (referenceSwath.burstStartTime - referenceSwath.sensingStart).total_seconds() * referenceSwath.prf + azoff
#secondary burst start times corresponding to reference burst start times (100% synchronization)
for k in range(-100000, 100000):
saz_burstx = scburstStartLine + referenceSwath.burstCycleLength * k
st_burstx = secondarySwath.sensingStart + datetime.timedelta(seconds=saz_burstx / referenceSwath.prf)
if saz_burstx >= 0.0 and saz_burstx <= secondarySwath.numberOfLines -1:
secondarySwath.burstStartTime = st_burstx
secondarySwath.burstLength = referenceSwath.burstLength
secondarySwath.burstCycleLength = referenceSwath.burstCycleLength
secondarySwath.swathNumber = referenceSwath.swathNumber
break
#unsynLines = 0
#synLines = referenceSwath.burstLength
#unsynTime += unsynLines / referenceSwath.prf
#synPercentage += synLines / referenceSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(100.0), 'runBaseline')
else:
pass
#overwrite original frame parameter file
if self._insar.modeCombination == 31:
frameDir = 'f{}_{}'.format(i+1, frameNumber)
self._insar.saveProduct(secondaryTrack.frames[i], os.path.join(frameDir, self._insar.secondaryFrameParameter))
#getting average
if self._insar.modeCombination == 21:
unsynTime /= numberOfFrames*numberOfSwaths
synPercentage /= numberOfFrames*numberOfSwaths
elif self._insar.modeCombination == 31:
unsynTime = 0.
synPercentage = 100.
else:
pass
#record results
if (self._insar.modeCombination == 21) or (self._insar.modeCombination == 31):
self._insar.burstUnsynchronizedTime = unsynTime
self._insar.burstSynchronization = synPercentage
catalog.addItem('burst synchronization averaged', '%.1f%%'%(synPercentage), 'runBaseline')
##################################################
#3. compute baseline
##################################################
#only compute baseline at four corners and center of the reference track
bboxRdr = getBboxRdr(referenceTrack)
rangeMin = bboxRdr[0]
rangeMax = bboxRdr[1]
azimuthTimeMin = bboxRdr[2]
azimuthTimeMax = bboxRdr[3]
azimuthTimeMid = azimuthTimeMin+datetime.timedelta(seconds=(azimuthTimeMax-azimuthTimeMin).total_seconds()/2.0)
rangeMid = (rangeMin + rangeMax) / 2.0
points = [[azimuthTimeMin, rangeMin],
[azimuthTimeMin, rangeMax],
[azimuthTimeMax, rangeMin],
[azimuthTimeMax, rangeMax],
[azimuthTimeMid, rangeMid]]
Bpar = []
Bperp = []
#modify Piyush's code for computing baslines
refElp = Planet(pname='Earth').ellipsoid
for x in points:
referenceSV = referenceTrack.orbit.interpolate(x[0], method='hermite')
target = referenceTrack.orbit.rdr2geo(x[0], x[1])
slvTime, slvrng = secondaryTrack.orbit.geo2rdr(target)
secondarySV = secondaryTrack.orbit.interpolateOrbit(slvTime, method='hermite')
targxyz = np.array(refElp.LLH(target[0], target[1], target[2]).ecef().tolist())
mxyz = np.array(referenceSV.getPosition())
mvel = np.array(referenceSV.getVelocity())
sxyz = np.array(secondarySV.getPosition())
#to fix abrupt change near zero in baseline grid. JUN-05-2020
mvelunit = mvel / np.linalg.norm(mvel)
sxyz = sxyz - np.dot ( sxyz-mxyz, mvelunit) * mvelunit
aa = np.linalg.norm(sxyz-mxyz)
costheta = (x[1]*x[1] + aa*aa - slvrng*slvrng)/(2.*x[1]*aa)
Bpar.append(aa*costheta)
perp = aa * np.sqrt(1 - costheta*costheta)
direction = np.sign(np.dot( np.cross(targxyz-mxyz, sxyz-mxyz), mvel))
Bperp.append(direction*perp)
catalog.addItem('parallel baseline at upperleft of reference track', Bpar[0], 'runBaseline')
catalog.addItem('parallel baseline at upperright of reference track', Bpar[1], 'runBaseline')
catalog.addItem('parallel baseline at lowerleft of reference track', Bpar[2], 'runBaseline')
catalog.addItem('parallel baseline at lowerright of reference track', Bpar[3], 'runBaseline')
catalog.addItem('parallel baseline at center of reference track', Bpar[4], 'runBaseline')
catalog.addItem('perpendicular baseline at upperleft of reference track', Bperp[0], 'runBaseline')
catalog.addItem('perpendicular baseline at upperright of reference track', Bperp[1], 'runBaseline')
catalog.addItem('perpendicular baseline at lowerleft of reference track', Bperp[2], 'runBaseline')
catalog.addItem('perpendicular baseline at lowerright of reference track', Bperp[3], 'runBaseline')
catalog.addItem('perpendicular baseline at center of reference track', Bperp[4], 'runBaseline')
##################################################
#4. compute bounding box
##################################################
referenceBbox = getBboxGeo(referenceTrack)
secondaryBbox = getBboxGeo(secondaryTrack)
catalog.addItem('reference bounding box', referenceBbox, 'runBaseline')
catalog.addItem('secondary bounding box', secondaryBbox, 'runBaseline')
catalog.printToLog(logger, "runBaseline")
self._insar.procDoc.addAllFromCatalog(catalog)
def runPreprocessor(self):
'''Extract images.
'''
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
#find files
#actually no need to use absolute path any longer, since we are able to find file from vrt now. 27-JAN-2020, CRL.
#denseoffset may still need absolute path when making links
self.referenceDir = os.path.abspath(self.referenceDir)
self.secondaryDir = os.path.abspath(self.secondaryDir)
ledFilesReference = sorted(glob.glob(os.path.join(self.referenceDir, 'LED-ALOS2*-*-*')))
imgFilesReference = sorted(glob.glob(os.path.join(self.referenceDir, 'IMG-{}-ALOS2*-*-*'.format(self.referencePolarization.upper()))))
ledFilesSecondary = sorted(glob.glob(os.path.join(self.secondaryDir, 'LED-ALOS2*-*-*')))
imgFilesSecondary = sorted(glob.glob(os.path.join(self.secondaryDir, 'IMG-{}-ALOS2*-*-*'.format(self.secondaryPolarization.upper()))))
firstFrameReference = ledFilesReference[0].split('-')[-3][-4:]
firstFrameSecondary = ledFilesSecondary[0].split('-')[-3][-4:]
firstFrameImagesReference = sorted(glob.glob(os.path.join(self.referenceDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.referencePolarization.upper(), firstFrameReference))))
firstFrameImagesSecondary = sorted(glob.glob(os.path.join(self.secondaryDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.secondaryPolarization.upper(), firstFrameSecondary))))
#determin operation mode
referenceMode = os.path.basename(ledFilesReference[0]).split('-')[-1][0:3]
secondaryMode = os.path.basename(ledFilesSecondary[0]).split('-')[-1][0:3]
spotlightModes = ['SBS']
stripmapModes = ['UBS', 'UBD', 'HBS', 'HBD', 'HBQ', 'FBS', 'FBD', 'FBQ']
scansarNominalModes = ['WBS', 'WBD', 'WWS', 'WWD']
scansarWideModes = ['VBS', 'VBD']
scansarModes = ['WBS', 'WBD', 'WWS', 'WWD', 'VBS', 'VBD']
#usable combinations
if (referenceMode in spotlightModes) and (secondaryMode in spotlightModes):
self._insar.modeCombination = 0
elif (referenceMode in stripmapModes) and (secondaryMode in stripmapModes):
self._insar.modeCombination = 1
elif (referenceMode in scansarNominalModes) and (secondaryMode in scansarNominalModes):
self._insar.modeCombination = 21
elif (referenceMode in scansarWideModes) and (secondaryMode in scansarWideModes):
self._insar.modeCombination = 22
elif (referenceMode in scansarNominalModes) and (secondaryMode in stripmapModes):
self._insar.modeCombination = 31
elif (referenceMode in scansarWideModes) and (secondaryMode in stripmapModes):
self._insar.modeCombination = 32
else:
print('\n\nthis mode combination is not possible')
print('note that for ScanSAR-stripmap, ScanSAR must be reference\n\n')
raise Exception('mode combination not supported')
# pixel size from real data processing. azimuth pixel size may change a bit as
# the antenna points to a different swath and therefore uses a different PRF.
# MODE RANGE PIXEL SIZE (LOOKS) AZIMUTH PIXEL SIZE (LOOKS)
# -------------------------------------------------------------------
# SPT [SBS]
# 1.4304222392897463 (2) 0.9351804642158579 (4)
# SM1 [UBS,UBD]
# 1.4304222392897463 (2) 1.8291988125114438 (2)
# SM2 [HBS,HBD,HBQ]
# 2.8608444785794984 (2) 3.0672373839847196 (2)
# SM3 [FBS,FBD,FBQ]
# 4.291266717869248 (2) 3.2462615913656667 (4)
# WD1 [WBS,WBD] [WWS,WWD]
# 8.582533435738496 (1) 2.6053935830031887 (14)
# 8.582533435738496 (1) 2.092362043327227 (14)
# 8.582533435738496 (1) 2.8817632034495717 (14)
# 8.582533435738496 (1) 3.054362492601842 (14)
# 8.582533435738496 (1) 2.4582084463356977 (14)
# WD2 [VBS,VBD]
# 8.582533435738496 (1) 2.9215796012950728 (14)
# 8.582533435738496 (1) 3.088859074497863 (14)
# 8.582533435738496 (1) 2.8792293071133073 (14)
# 8.582533435738496 (1) 3.0592146044234854 (14)
# 8.582533435738496 (1) 2.8818767752199137 (14)
# 8.582533435738496 (1) 3.047038521027477 (14)
# 8.582533435738496 (1) 2.898816222039108 (14)
#determine default number of looks:
self._insar.numberRangeLooks1 = self.numberRangeLooks1
self._insar.numberAzimuthLooks1 = self.numberAzimuthLooks1
self._insar.numberRangeLooks2 = self.numberRangeLooks2
self._insar.numberAzimuthLooks2 = self.numberAzimuthLooks2
#the following two will be automatically determined by runRdrDemOffset.py
self._insar.numberRangeLooksSim = self.numberRangeLooksSim
self._insar.numberAzimuthLooksSim = self.numberAzimuthLooksSim
self._insar.numberRangeLooksIon = self.numberRangeLooksIon
self._insar.numberAzimuthLooksIon = self.numberAzimuthLooksIon
if self._insar.numberRangeLooks1 == None:
if referenceMode in ['SBS']:
self._insar.numberRangeLooks1 = 2
elif referenceMode in ['UBS', 'UBD']:
self._insar.numberRangeLooks1 = 2
elif referenceMode in ['HBS', 'HBD', 'HBQ']:
self._insar.numberRangeLooks1 = 2
elif referenceMode in ['FBS', 'FBD', 'FBQ']:
self._insar.numberRangeLooks1 = 2
elif referenceMode in ['WBS', 'WBD']:
self._insar.numberRangeLooks1 = 1
elif referenceMode in ['WWS', 'WWD']:
self._insar.numberRangeLooks1 = 2
elif referenceMode in ['VBS', 'VBD']:
self._insar.numberRangeLooks1 = 1
else:
raise Exception('unknow acquisition mode')
if self._insar.numberAzimuthLooks1 == None:
if referenceMode in ['SBS']:
self._insar.numberAzimuthLooks1 = 4
elif referenceMode in ['UBS', 'UBD']:
self._insar.numberAzimuthLooks1 = 2
elif referenceMode in ['HBS', 'HBD', 'HBQ']:
self._insar.numberAzimuthLooks1 = 2
elif referenceMode in ['FBS', 'FBD', 'FBQ']:
self._insar.numberAzimuthLooks1 = 4
elif referenceMode in ['WBS', 'WBD']:
self._insar.numberAzimuthLooks1 = 14
elif referenceMode in ['WWS', 'WWD']:
self._insar.numberAzimuthLooks1 = 14
elif referenceMode in ['VBS', 'VBD']:
self._insar.numberAzimuthLooks1 = 14
else:
raise Exception('unknow acquisition mode')
if self._insar.numberRangeLooks2 == None:
if referenceMode in spotlightModes:
self._insar.numberRangeLooks2 = 4
elif referenceMode in stripmapModes:
self._insar.numberRangeLooks2 = 4
elif referenceMode in scansarModes:
self._insar.numberRangeLooks2 = 5
else:
raise Exception('unknow acquisition mode')
if self._insar.numberAzimuthLooks2 == None:
if referenceMode in spotlightModes:
self._insar.numberAzimuthLooks2 = 4
elif referenceMode in stripmapModes:
self._insar.numberAzimuthLooks2 = 4
elif referenceMode in scansarModes:
self._insar.numberAzimuthLooks2 = 2
else:
raise Exception('unknow acquisition mode')
if self._insar.numberRangeLooksIon == None:
if referenceMode in spotlightModes:
self._insar.numberRangeLooksIon = 16
elif referenceMode in stripmapModes:
self._insar.numberRangeLooksIon = 16
elif referenceMode in scansarModes:
self._insar.numberRangeLooksIon = 40
else:
raise Exception('unknow acquisition mode')
if self._insar.numberAzimuthLooksIon == None:
if referenceMode in spotlightModes:
self._insar.numberAzimuthLooksIon = 16
elif referenceMode in stripmapModes:
self._insar.numberAzimuthLooksIon = 16
elif referenceMode in scansarModes:
self._insar.numberAzimuthLooksIon = 16
else:
raise Exception('unknow acquisition mode')
#define processing file names
self._insar.referenceDate = os.path.basename(ledFilesReference[0]).split('-')[2]
self._insar.secondaryDate = os.path.basename(ledFilesSecondary[0]).split('-')[2]
self._insar.setFilename(referenceDate=self._insar.referenceDate, secondaryDate=self._insar.secondaryDate, nrlks1=self._insar.numberRangeLooks1, nalks1=self._insar.numberAzimuthLooks1, nrlks2=self._insar.numberRangeLooks2, nalks2=self._insar.numberAzimuthLooks2)
#find frame numbers
if (self._insar.modeCombination == 31) or (self._insar.modeCombination == 32):
if (self.referenceFrames == None) or (self.secondaryFrames == None):
raise Exception('for ScanSAR-stripmap inteferometry, you must set reference and secondary frame numbers')
#if not set, find frames automatically
if self.referenceFrames == None:
self.referenceFrames = []
for led in ledFilesReference:
frameNumber = os.path.basename(led).split('-')[1][-4:]
if frameNumber not in self.referenceFrames:
self.referenceFrames.append(frameNumber)
if self.secondaryFrames == None:
self.secondaryFrames = []
for led in ledFilesSecondary:
frameNumber = os.path.basename(led).split('-')[1][-4:]
if frameNumber not in self.secondaryFrames:
self.secondaryFrames.append(frameNumber)
#sort frames
self.referenceFrames = sorted(self.referenceFrames)
self.secondaryFrames = sorted(self.secondaryFrames)
#check number of frames
if len(self.referenceFrames) != len(self.secondaryFrames):
raise Exception('number of frames in reference dir is not equal to number of frames \
in secondary dir. please set frame number manually')
#find swath numbers (if not ScanSAR-ScanSAR, compute valid swaths)
if (self._insar.modeCombination == 0) or (self._insar.modeCombination == 1):
self.startingSwath = 1
self.endingSwath = 1
if self._insar.modeCombination == 21:
if self.startingSwath == None:
self.startingSwath = 1
if self.endingSwath == None:
self.endingSwath = 5
if self._insar.modeCombination == 22:
if self.startingSwath == None:
self.startingSwath = 1
if self.endingSwath == None:
self.endingSwath = 7
#determine starting and ending swaths for ScanSAR-stripmap, user's settings are overwritten
#use first frame to check overlap
if (self._insar.modeCombination == 31) or (self._insar.modeCombination == 32):
if self._insar.modeCombination == 31:
numberOfSwaths = 5
else:
numberOfSwaths = 7
overlapSubswaths = []
for i in range(numberOfSwaths):
overlapRatio = check_overlap(ledFilesReference[0], firstFrameImagesReference[i], ledFilesSecondary[0], firstFrameImagesSecondary[0])
if overlapRatio > 1.0 / 4.0:
overlapSubswaths.append(i+1)
if overlapSubswaths == []:
raise Exception('There is no overlap area between the ScanSAR-stripmap pair')
self.startingSwath = int(overlapSubswaths[0])
self.endingSwath = int(overlapSubswaths[-1])
#save the valid frames and swaths for future processing
self._insar.referenceFrames = self.referenceFrames
self._insar.secondaryFrames = self.secondaryFrames
self._insar.startingSwath = self.startingSwath
self._insar.endingSwath = self.endingSwath
##################################################
#1. create directories and read data
##################################################
self.reference.configure()
self.secondary.configure()
self.reference.track.configure()
self.secondary.track.configure()
for i, (referenceFrame, secondaryFrame) in enumerate(zip(self._insar.referenceFrames, self._insar.secondaryFrames)):
#frame number starts with 1
frameDir = 'f{}_{}'.format(i+1, referenceFrame)
os.makedirs(frameDir, exist_ok=True)
os.chdir(frameDir)
#attach a frame to reference and secondary
frameObjReference = MultiMode.createFrame()
frameObjSecondary = MultiMode.createFrame()
frameObjReference.configure()
frameObjSecondary.configure()
self.reference.track.frames.append(frameObjReference)
self.secondary.track.frames.append(frameObjSecondary)
#swath number starts with 1
for j in range(self._insar.startingSwath, self._insar.endingSwath+1):
print('processing frame {} swath {}'.format(referenceFrame, j))
swathDir = 's{}'.format(j)
os.makedirs(swathDir, exist_ok=True)
os.chdir(swathDir)
#attach a swath to reference and secondary
swathObjReference = MultiMode.createSwath()
swathObjSecondary = MultiMode.createSwath()
swathObjReference.configure()
swathObjSecondary.configure()
self.reference.track.frames[-1].swaths.append(swathObjReference)
self.secondary.track.frames[-1].swaths.append(swathObjSecondary)
#setup reference
self.reference.leaderFile = sorted(glob.glob(os.path.join(self.referenceDir, 'LED-ALOS2*{}-*-*'.format(referenceFrame))))[0]
if referenceMode in scansarModes:
self.reference.imageFile = sorted(glob.glob(os.path.join(self.referenceDir, 'IMG-{}-ALOS2*{}-*-*-F{}'.format(self.referencePolarization.upper(), referenceFrame, j))))[0]
else:
self.reference.imageFile = sorted(glob.glob(os.path.join(self.referenceDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.referencePolarization.upper(), referenceFrame))))[0]
self.reference.outputFile = self._insar.referenceSlc
self.reference.useVirtualFile = self.useVirtualFile
#read reference
(imageFDR, imageData)=self.reference.readImage()
(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord)=self.reference.readLeader()
self.reference.setSwath(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.reference.setFrame(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.reference.setTrack(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
#setup secondary
self.secondary.leaderFile = sorted(glob.glob(os.path.join(self.secondaryDir, 'LED-ALOS2*{}-*-*'.format(secondaryFrame))))[0]
if secondaryMode in scansarModes:
self.secondary.imageFile = sorted(glob.glob(os.path.join(self.secondaryDir, 'IMG-{}-ALOS2*{}-*-*-F{}'.format(self.secondaryPolarization.upper(), secondaryFrame, j))))[0]
else:
self.secondary.imageFile = sorted(glob.glob(os.path.join(self.secondaryDir, 'IMG-{}-ALOS2*{}-*-*'.format(self.secondaryPolarization.upper(), secondaryFrame))))[0]
self.secondary.outputFile = self._insar.secondarySlc
self.secondary.useVirtualFile = self.useVirtualFile
#read secondary
(imageFDR, imageData)=self.secondary.readImage()
(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord)=self.secondary.readLeader()
self.secondary.setSwath(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.secondary.setFrame(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
self.secondary.setTrack(leaderFDR, sceneHeaderRecord, platformPositionRecord, facilityRecord, imageFDR, imageData)
os.chdir('../')
self._insar.saveProduct(self.reference.track.frames[-1], self._insar.referenceFrameParameter)
self._insar.saveProduct(self.secondary.track.frames[-1], self._insar.secondaryFrameParameter)
os.chdir('../')
self._insar.saveProduct(self.reference.track, self._insar.referenceTrackParameter)
self._insar.saveProduct(self.secondary.track, self._insar.secondaryTrackParameter)
##################################################
#2. compute burst synchronization
##################################################
#burst synchronization may slowly change along a track as a result of the changing relative speed of the two flights
#in one frame, real unsynchronized time is the same for all swaths
unsynTime = 0
#real synchronized time/percentage depends on the swath burst length (synTime = burstlength - abs(unsynTime))
#synTime = 0
synPercentage = 0
numberOfFrames = len(self._insar.referenceFrames)
numberOfSwaths = self._insar.endingSwath - self._insar.startingSwath + 1
for i, frameNumber in enumerate(self._insar.referenceFrames):
for j, swathNumber in enumerate(range(self._insar.startingSwath, self._insar.endingSwath + 1)):
referenceSwath = self.reference.track.frames[i].swaths[j]
secondarySwath = self.secondary.track.frames[i].swaths[j]
#using Piyush's code for computing range and azimuth offsets
midRange = referenceSwath.startingRange + referenceSwath.rangePixelSize * referenceSwath.numberOfSamples * 0.5
midSensingStart = referenceSwath.sensingStart + datetime.timedelta(seconds = referenceSwath.numberOfLines * 0.5 / referenceSwath.prf)
llh = self.reference.track.orbit.rdr2geo(midSensingStart, midRange)
slvaz, slvrng = self.secondary.track.orbit.geo2rdr(llh)
###Translate to offsets
#note that secondary range pixel size and prf might be different from reference, here we assume there is a virtual secondary with same
#range pixel size and prf
rgoff = ((slvrng - secondarySwath.startingRange) / referenceSwath.rangePixelSize) - referenceSwath.numberOfSamples * 0.5
azoff = ((slvaz - secondarySwath.sensingStart).total_seconds() * referenceSwath.prf) - referenceSwath.numberOfLines * 0.5
#compute burst synchronization
#burst parameters for ScanSAR wide mode not estimed yet
if self._insar.modeCombination == 21:
scburstStartLine = (referenceSwath.burstStartTime - referenceSwath.sensingStart).total_seconds() * referenceSwath.prf + azoff
#secondary burst start times corresponding to reference burst start times (100% synchronization)
scburstStartLines = np.arange(scburstStartLine - 100000*referenceSwath.burstCycleLength, \
scburstStartLine + 100000*referenceSwath.burstCycleLength, \
referenceSwath.burstCycleLength)
dscburstStartLines = -((secondarySwath.burstStartTime - secondarySwath.sensingStart).total_seconds() * secondarySwath.prf - scburstStartLines)
#find the difference with minimum absolute value
unsynLines = dscburstStartLines[np.argmin(np.absolute(dscburstStartLines))]
if np.absolute(unsynLines) >= secondarySwath.burstLength:
synLines = 0
if unsynLines > 0:
unsynLines = secondarySwath.burstLength
else:
unsynLines = -secondarySwath.burstLength
else:
synLines = secondarySwath.burstLength - np.absolute(unsynLines)
unsynTime += unsynLines / referenceSwath.prf
synPercentage += synLines / referenceSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(synLines / referenceSwath.burstLength * 100.0), 'runPreprocessor')
############################################################################################
#illustration of the sign of the number of unsynchronized lines (unsynLines)
#The convention is the same as ampcor offset, that is,
# secondaryLineNumber = referenceLineNumber + unsynLines
#
# |-----------------------| ------------
# | | ^
# | | |
# | | | unsynLines < 0
# | | |
# | | \ /
# | | |-----------------------|
# | | | |
# | | | |
# |-----------------------| | |
# Reference Burst | |
# | |
# | |
# | |
# | |
# |-----------------------|
# Secondary Burst
#
#
############################################################################################
##burst parameters for ScanSAR wide mode not estimed yet
elif self._insar.modeCombination == 31:
#scansar is reference
scburstStartLine = (referenceSwath.burstStartTime - referenceSwath.sensingStart).total_seconds() * referenceSwath.prf + azoff
#secondary burst start times corresponding to reference burst start times (100% synchronization)
for k in range(-100000, 100000):
saz_burstx = scburstStartLine + referenceSwath.burstCycleLength * k
st_burstx = secondarySwath.sensingStart + datetime.timedelta(seconds=saz_burstx / referenceSwath.prf)
if saz_burstx >= 0.0 and saz_burstx <= secondarySwath.numberOfLines -1:
secondarySwath.burstStartTime = st_burstx
secondarySwath.burstLength = referenceSwath.burstLength
secondarySwath.burstCycleLength = referenceSwath.burstCycleLength
secondarySwath.swathNumber = referenceSwath.swathNumber
break
#unsynLines = 0
#synLines = referenceSwath.burstLength
#unsynTime += unsynLines / referenceSwath.prf
#synPercentage += synLines / referenceSwath.burstLength * 100.0
catalog.addItem('burst synchronization of frame {} swath {}'.format(frameNumber, swathNumber), '%.1f%%'%(100.0), 'runPreprocessor')
else:
pass
#overwrite original frame parameter file
if self._insar.modeCombination == 31:
frameDir = 'f{}_{}'.format(i+1, frameNumber)
self._insar.saveProduct(self.secondary.track.frames[i], os.path.join(frameDir, self._insar.secondaryFrameParameter))
#getting average
if self._insar.modeCombination == 21:
unsynTime /= numberOfFrames*numberOfSwaths
synPercentage /= numberOfFrames*numberOfSwaths
elif self._insar.modeCombination == 31:
unsynTime = 0.
synPercentage = 100.
else:
pass
#record results
if (self._insar.modeCombination == 21) or (self._insar.modeCombination == 31):
self._insar.burstUnsynchronizedTime = unsynTime
self._insar.burstSynchronization = synPercentage
catalog.addItem('burst synchronization averaged', '%.1f%%'%(synPercentage), 'runPreprocessor')
##################################################
#3. compute baseline
##################################################
#only compute baseline at four corners and center of the reference track
bboxRdr = getBboxRdr(self.reference.track)
rangeMin = bboxRdr[0]
rangeMax = bboxRdr[1]
azimuthTimeMin = bboxRdr[2]
azimuthTimeMax = bboxRdr[3]
azimuthTimeMid = azimuthTimeMin+datetime.timedelta(seconds=(azimuthTimeMax-azimuthTimeMin).total_seconds()/2.0)
rangeMid = (rangeMin + rangeMax) / 2.0
points = [[azimuthTimeMin, rangeMin],
[azimuthTimeMin, rangeMax],
[azimuthTimeMax, rangeMin],
[azimuthTimeMax, rangeMax],
[azimuthTimeMid, rangeMid]]
Bpar = []
Bperp = []
#modify Piyush's code for computing baslines
refElp = Planet(pname='Earth').ellipsoid
for x in points:
referenceSV = self.reference.track.orbit.interpolate(x[0], method='hermite')
target = self.reference.track.orbit.rdr2geo(x[0], x[1])
slvTime, slvrng = self.secondary.track.orbit.geo2rdr(target)
secondarySV = self.secondary.track.orbit.interpolateOrbit(slvTime, method='hermite')
targxyz = np.array(refElp.LLH(target[0], target[1], target[2]).ecef().tolist())
mxyz = np.array(referenceSV.getPosition())
mvel = np.array(referenceSV.getVelocity())
sxyz = np.array(secondarySV.getPosition())
#to fix abrupt change near zero in baseline grid. JUN-05-2020
mvelunit = mvel / np.linalg.norm(mvel)
sxyz = sxyz - np.dot ( sxyz-mxyz, mvelunit) * mvelunit
aa = np.linalg.norm(sxyz-mxyz)
costheta = (x[1]*x[1] + aa*aa - slvrng*slvrng)/(2.*x[1]*aa)
Bpar.append(aa*costheta)
perp = aa * np.sqrt(1 - costheta*costheta)
direction = np.sign(np.dot( np.cross(targxyz-mxyz, sxyz-mxyz), mvel))
Bperp.append(direction*perp)
catalog.addItem('parallel baseline at upperleft of reference track', Bpar[0], 'runPreprocessor')
catalog.addItem('parallel baseline at upperright of reference track', Bpar[1], 'runPreprocessor')
catalog.addItem('parallel baseline at lowerleft of reference track', Bpar[2], 'runPreprocessor')
catalog.addItem('parallel baseline at lowerright of reference track', Bpar[3], 'runPreprocessor')
catalog.addItem('parallel baseline at center of reference track', Bpar[4], 'runPreprocessor')
catalog.addItem('perpendicular baseline at upperleft of reference track', Bperp[0], 'runPreprocessor')
catalog.addItem('perpendicular baseline at upperright of reference track', Bperp[1], 'runPreprocessor')
catalog.addItem('perpendicular baseline at lowerleft of reference track', Bperp[2], 'runPreprocessor')
catalog.addItem('perpendicular baseline at lowerright of reference track', Bperp[3], 'runPreprocessor')
catalog.addItem('perpendicular baseline at center of reference track', Bperp[4], 'runPreprocessor')
##################################################
#4. compute bounding box
##################################################
referenceBbox = getBboxGeo(self.reference.track)
secondaryBbox = getBboxGeo(self.secondary.track)
catalog.addItem('reference bounding box', referenceBbox, 'runPreprocessor')
catalog.addItem('secondary bounding box', secondaryBbox, 'runPreprocessor')
catalog.printToLog(logger, "runPreprocessor")
self._insar.procDoc.addAllFromCatalog(catalog)
def runComputeBaseline(self):
from isceobj.Planet.Planet import Planet
import numpy as np
swathList = self._insar.getInputSwathList(self.swaths)
commonBurstStartMasterIndex = [-1] * self._insar.numberOfSwaths
commonBurstStartSlaveIndex = [-1] * self._insar.numberOfSwaths
numberOfCommonBursts = [0] * self._insar.numberOfSwaths
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
for swath in swathList:
masterxml = os.path.join(self._insar.masterSlcProduct,
'IW{0}.xml'.format(swath))
slavexml = os.path.join(self._insar.slaveSlcProduct,
'IW{0}.xml'.format(swath))
if os.path.exists(masterxml) and os.path.exists(slavexml):
master = self._insar.loadProduct(masterxml)
slave = self._insar.loadProduct(slavexml)
burstOffset, minBurst, maxBurst = master.getCommonBurstLimits(
slave)
commonSlaveIndex = minBurst + burstOffset
numberCommon = maxBurst - minBurst
if numberCommon == 0:
print('No common bursts found for swath {0}'.format(swath))
else:
###Bookkeeping
commonBurstStartMasterIndex[swath - 1] = minBurst
commonBurstStartSlaveIndex[swath - 1] = commonSlaveIndex
numberOfCommonBursts[swath - 1] = numberCommon
catalog.addItem(
'IW-{0} Number of bursts in master'.format(swath),
master.numberOfBursts, 'baseline')
catalog.addItem(
'IW-{0} First common burst in master'.format(swath),
minBurst, 'baseline')
catalog.addItem(
'IW-{0} Last common burst in master'.format(swath),
maxBurst, 'baseline')
catalog.addItem(
'IW-{0} Number of bursts in slave'.format(swath),
slave.numberOfBursts, 'baseline')
catalog.addItem(
'IW-{0} First common burst in slave'.format(swath),
minBurst + burstOffset, 'baseline')
catalog.addItem(
'IW-{0} Last common burst in slave'.format(swath),
maxBurst + burstOffset, 'baseline')
catalog.addItem('IW-{0} Number of common bursts'.format(swath),
numberCommon, 'baseline')
refElp = Planet(pname='Earth').ellipsoid
Bpar = []
Bperp = []
for boff in [0, numberCommon - 1]:
###Baselines at top of common bursts
mBurst = master.bursts[minBurst + boff]
sBurst = slave.bursts[commonSlaveIndex + boff]
###Target at mid range
tmid = mBurst.sensingMid
rng = mBurst.midRange
masterSV = mBurst.orbit.interpolate(tmid, method='hermite')
target = mBurst.orbit.rdr2geo(tmid, rng)
slvTime, slvrng = sBurst.orbit.geo2rdr(target)
slaveSV = sBurst.orbit.interpolateOrbit(slvTime,
method='hermite')
targxyz = np.array(
refElp.LLH(target[0], target[1],
target[2]).ecef().tolist())
mxyz = np.array(masterSV.getPosition())
mvel = np.array(masterSV.getVelocity())
sxyz = np.array(slaveSV.getPosition())
mvelunit = mvel / np.linalg.norm(mvel)
sxyz = sxyz - np.dot(sxyz - mxyz, mvelunit) * mvelunit
aa = np.linalg.norm(sxyz - mxyz)
costheta = (rng * rng + aa * aa -
slvrng * slvrng) / (2. * rng * aa)
Bpar.append(aa * costheta)
perp = aa * np.sqrt(1 - costheta * costheta)
direction = np.sign(
np.dot(np.cross(targxyz - mxyz, sxyz - mxyz), mvel))
Bperp.append(direction * perp)
catalog.addItem(
'IW-{0} Bpar at midrange for first common burst'.format(
swath), Bpar[0], 'baseline')
catalog.addItem(
'IW-{0} Bperp at midrange for first common burst'.format(
swath), Bperp[0], 'baseline')
catalog.addItem(
'IW-{0} Bpar at midrange for last common burst'.format(
swath), Bpar[1], 'baseline')
catalog.addItem(
'IW-{0} Bperp at midrange for last common burst'.format(
swath), Bperp[1], 'baseline')
else:
print('Skipping processing for swath number IW-{0}'.format(swath))
self._insar.commonBurstStartMasterIndex = commonBurstStartMasterIndex
self._insar.commonBurstStartSlaveIndex = commonBurstStartSlaveIndex
self._insar.numberOfCommonBursts = numberOfCommonBursts
if not any([x >= 2 for x in self._insar.numberOfCommonBursts]):
print(
'No swaths contain any burst overlaps ... cannot continue for interferometry applications'
)
catalog.printToLog(logger, "runComputeBaseline")
self._insar.procDoc.addAllFromCatalog(catalog)
def main(iargs=None):
'''Compute baseline.
'''
inps = cmdLineParse(iargs)
from isceobj.Planet.Planet import Planet
import numpy as np
#swathList = self._insar.getInputSwathList(self.swaths)
#commonBurstStartMasterIndex = [-1] * self._insar.numberOfSwaths
#commonBurstStartSlaveIndex = [-1] * self._insar.numberOfSwaths
#numberOfCommonBursts = [0] * self._insar.numberOfSwaths
masterSwathList = ut.getSwathList(inps.master)
slaveSwathList = ut.getSwathList(inps.slave)
swathList = list(sorted(set(masterSwathList + slaveSwathList)))
#catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
baselineDir = os.path.dirname(inps.baselineFile)
if not os.path.exists(baselineDir):
os.makedirs(baselineDir)
f = open(inps.baselineFile, 'w')
for swath in swathList:
masterxml = os.path.join(inps.master, 'IW{0}.xml'.format(swath))
slavexml = os.path.join(inps.slave, 'IW{0}.xml'.format(swath))
if os.path.exists(masterxml) and os.path.exists(slavexml):
master = ut.loadProduct(
os.path.join(inps.master, 'IW{0}.xml'.format(swath)))
slave = ut.loadProduct(
os.path.join(inps.slave, 'IW{0}.xml'.format(swath)))
minMaster = master.bursts[0].burstNumber
maxMaster = master.bursts[-1].burstNumber
minSlave = slave.bursts[0].burstNumber
maxSlave = slave.bursts[-1].burstNumber
minBurst = max(minSlave, minMaster)
maxBurst = min(maxSlave, maxMaster)
print('minSlave,maxSlave', minSlave, maxSlave)
print('minMaster,maxMaster', minMaster, maxMaster)
print('minBurst, maxBurst: ', minBurst, maxBurst)
refElp = Planet(pname='Earth').ellipsoid
Bpar = []
Bperp = []
for ii in range(minBurst, maxBurst + 1):
###Bookkeeping
#commonBurstStartMasterIndex[swath-1] = minBurst
#commonBurstStartSlaveIndex[swath-1] = commonSlaveIndex
#numberOfCommonBursts[swath-1] = numberCommon
#catalog.addItem('IW-{0} Number of bursts in master'.format(swath), master.numberOfBursts, 'baseline')
#catalog.addItem('IW-{0} First common burst in master'.format(swath), minBurst, 'baseline')
#catalog.addItem('IW-{0} Last common burst in master'.format(swath), maxBurst, 'baseline')
#catalog.addItem('IW-{0} Number of bursts in slave'.format(swath), slave.numberOfBursts, 'baseline')
#catalog.addItem('IW-{0} First common burst in slave'.format(swath), minBurst + burstOffset, 'baseline')
#catalog.addItem('IW-{0} Last common burst in slave'.format(swath), maxBurst + burstOffset, 'baseline')
#catalog.addItem('IW-{0} Number of common bursts'.format(swath), numberCommon, 'baseline')
#refElp = Planet(pname='Earth').ellipsoid
#Bpar = []
#Bperp = []
#for boff in [0, numberCommon-1]:
###Baselines at top of common bursts
mBurst = master.bursts[ii - minMaster]
sBurst = slave.bursts[ii - minSlave]
###Target at mid range
tmid = mBurst.sensingMid
rng = mBurst.midRange
masterSV = mBurst.orbit.interpolate(tmid, method='hermite')
target = mBurst.orbit.rdr2geo(tmid, rng)
slvTime, slvrng = sBurst.orbit.geo2rdr(target)
slaveSV = sBurst.orbit.interpolateOrbit(slvTime,
method='hermite')
targxyz = np.array(
refElp.LLH(target[0], target[1],
target[2]).ecef().tolist())
mxyz = np.array(masterSV.getPosition())
mvel = np.array(masterSV.getVelocity())
sxyz = np.array(slaveSV.getPosition())
aa = np.linalg.norm(sxyz - mxyz)
costheta = (rng * rng + aa * aa - slvrng * slvrng) / (2. *
rng * aa)
Bpar.append(aa * costheta)
perp = aa * np.sqrt(1 - costheta * costheta)
direction = np.sign(
np.dot(np.cross(targxyz - mxyz, sxyz - mxyz), mvel))
Bperp.append(direction * perp)
#catalog.addItem('IW-{0} Bpar at midrange for first common burst'.format(swath), Bpar[0], 'baseline')
#catalog.addItem('IW-{0} Bperp at midrange for first common burst'.format(swath), Bperp[0], 'baseline')
#catalog.addItem('IW-{0} Bpar at midrange for last common burst'.format(swath), Bpar[1], 'baseline')
#catalog.addItem('IW-{0} Bperp at midrange for last common burst'.format(swath), Bperp[1], 'baseline')
print('Bprep: ', Bperp)
print('Bpar: ', Bpar)
f.write('swath: IW{0}'.format(swath) + '\n')
f.write('Bperp (average): ' + str(np.mean(Bperp)) + '\n')
f.write('Bpar (average): ' + str(np.mean(Bpar)) + '\n')
f.close()
