235 lines
7.5 KiB
Python
235 lines
7.5 KiB
Python
#
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# Author: Piyush Agram
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# Copyright 2016
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#
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import numpy as np
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import os
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import isceobj
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import datetime
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import sys
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import logging
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logger = logging.getLogger('isce.topsinsar.fineoffsets')
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def runGeo2rdrCPU(info, rdict, misreg_az=0.0, misreg_rg=0.0):
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from zerodop.geo2rdr import createGeo2rdr
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from isceobj.Planet.Planet import Planet
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latImage = isceobj.createImage()
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latImage.load(rdict['lat'] + '.xml')
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latImage.setAccessMode('READ')
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latImage.createImage()
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lonImage = isceobj.createImage()
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lonImage.load(rdict['lon'] + '.xml')
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lonImage.setAccessMode('READ')
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lonImage.createImage()
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demImage = isceobj.createImage()
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demImage.load(rdict['hgt'] + '.xml')
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demImage.setAccessMode('READ')
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demImage.createImage()
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delta = datetime.timedelta(seconds=misreg_az)
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logger.info('Additional time offset applied in geo2rdr: {0} secs'.format(misreg_az))
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logger.info('Additional range offset applied in geo2rdr: {0} m'.format(misreg_rg))
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#####Run Geo2rdr
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planet = Planet(pname='Earth')
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grdr = createGeo2rdr()
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grdr.configure()
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grdr.slantRangePixelSpacing = info.rangePixelSize
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grdr.prf = 1.0 / info.azimuthTimeInterval
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grdr.radarWavelength = info.radarWavelength
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grdr.orbit = info.orbit
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grdr.width = info.numberOfSamples
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grdr.length = info.numberOfLines
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grdr.demLength = demImage.getLength()
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grdr.demWidth = demImage.getWidth()
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grdr.wireInputPort(name='planet', object=planet)
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grdr.numberRangeLooks = 1
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grdr.numberAzimuthLooks = 1
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grdr.lookSide = -1
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grdr.setSensingStart(info.sensingStart - delta)
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grdr.rangeFirstSample = info.startingRange - misreg_rg
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grdr.dopplerCentroidCoeffs = [0.] ###Zero doppler
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grdr.rangeOffsetImageName = rdict['rangeOffName']
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grdr.azimuthOffsetImageName = rdict['azOffName']
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grdr.demImage = demImage
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grdr.latImage = latImage
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grdr.lonImage = lonImage
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grdr.geo2rdr()
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return
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def runGeo2rdrGPU(info, rdict, misreg_az=0.0, misreg_rg=0.0):
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from zerodop.GPUgeo2rdr.GPUgeo2rdr import PyGeo2rdr
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from isceobj.Planet.Planet import Planet
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from iscesys import DateTimeUtil as DTU
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latImage = isceobj.createImage()
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latImage.load(rdict['lat'] + '.xml')
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latImage.setAccessMode('READ')
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latImage.createImage()
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lonImage = isceobj.createImage()
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lonImage.load(rdict['lon'] + '.xml')
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lonImage.setAccessMode('READ')
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lonImage.createImage()
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demImage = isceobj.createImage()
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demImage.load(rdict['hgt'] + '.xml')
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demImage.setAccessMode('READ')
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demImage.createImage()
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delta = datetime.timedelta(seconds=misreg_az)
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logger.info('Additional time offset applied in geo2rdr: {0} secs'.format(misreg_az))
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logger.info('Additional range offset applied in geo2rdr: {0} m'.format(misreg_rg))
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#####Run Geo2rdr
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planet = Planet(pname='Earth')
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grdr = PyGeo2rdr()
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grdr.setRangePixelSpacing(info.rangePixelSize)
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grdr.setPRF(1.0 / info.azimuthTimeInterval)
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grdr.setRadarWavelength(info.radarWavelength)
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grdr.createOrbit(0, len(info.orbit.stateVectors.list))
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count = 0
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for sv in info.orbit.stateVectors.list:
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td = DTU.seconds_since_midnight(sv.getTime())
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pos = sv.getPosition()
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vel = sv.getVelocity()
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grdr.setOrbitVector(count, td, pos[0], pos[1], pos[2], vel[0], vel[1], vel[2])
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count += 1
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grdr.setOrbitMethod(0)
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grdr.setWidth(info.numberOfSamples)
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grdr.setLength(info.numberOfLines)
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grdr.setSensingStart(DTU.seconds_since_midnight(info.sensingStart -delta))
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grdr.setRangeFirstSample(info.startingRange - misreg_rg)
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grdr.setNumberRangeLooks(1)
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grdr.setNumberAzimuthLooks(1)
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grdr.setEllipsoidMajorSemiAxis(planet.ellipsoid.a)
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grdr.setEllipsoidEccentricitySquared(planet.ellipsoid.e2)
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grdr.createPoly(0, 0., 1.)
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grdr.setPolyCoeff(0, 0.)
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grdr.setDemLength(demImage.getLength())
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grdr.setDemWidth(demImage.getWidth())
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grdr.setBistaticFlag(0)
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rangeOffsetImage = isceobj.createImage()
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rangeOffsetImage.setFilename(rdict['rangeOffName'])
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rangeOffsetImage.setAccessMode('write')
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rangeOffsetImage.setDataType('FLOAT')
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rangeOffsetImage.setCaster('write', 'DOUBLE')
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rangeOffsetImage.setWidth(demImage.width)
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rangeOffsetImage.createImage()
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azimuthOffsetImage = isceobj.createImage()
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azimuthOffsetImage.setFilename(rdict['azOffName'])
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azimuthOffsetImage.setAccessMode('write')
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azimuthOffsetImage.setDataType('FLOAT')
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azimuthOffsetImage.setCaster('write', 'DOUBLE')
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azimuthOffsetImage.setWidth(demImage.width)
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azimuthOffsetImage.createImage()
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grdr.setLatAccessor(latImage.getImagePointer())
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grdr.setLonAccessor(lonImage.getImagePointer())
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grdr.setHgtAccessor(demImage.getImagePointer())
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grdr.setAzAccessor(0)
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grdr.setRgAccessor(0)
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grdr.setAzOffAccessor(azimuthOffsetImage.getImagePointer())
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grdr.setRgOffAccessor(rangeOffsetImage.getImagePointer())
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grdr.geo2rdr()
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rangeOffsetImage.finalizeImage()
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rangeOffsetImage.renderHdr()
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azimuthOffsetImage.finalizeImage()
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azimuthOffsetImage.renderHdr()
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latImage.finalizeImage()
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lonImage.finalizeImage()
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demImage.finalizeImage()
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return
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pass
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def runFineOffsets(self):
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'''
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Estimate offsets using geometry
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'''
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hasGPU = self.useGPU and self._insar.hasGPU()
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if hasGPU:
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runGeo2rdr = runGeo2rdrGPU
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else:
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runGeo2rdr = runGeo2rdrCPU
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##Catalog
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catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
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misreg_az = self._insar.secondaryTimingCorrection
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catalog.addItem('Initial secondary azimuth timing correction', misreg_az, 'fineoff')
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misreg_rg = self._insar.secondaryRangeCorrection
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catalog.addItem('Initial secondary range timing correction', misreg_rg, 'fineoff')
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swathList = self._insar.getValidSwathList(self.swaths)
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for swath in swathList:
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##Load secondary metadata
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secondary = self._insar.loadProduct( os.path.join(self._insar.secondarySlcProduct, 'IW{0}.xml'.format(swath)))
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###Offsets output directory
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outdir = os.path.join(self._insar.fineOffsetsDirname, 'IW{0}'.format(swath))
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os.makedirs(outdir, exist_ok=True)
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###Burst indices w.r.t reference
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minBurst, maxBurst = self._insar.commonReferenceBurstLimits(swath-1)
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geomDir = os.path.join(self._insar.geometryDirname, 'IW{0}'.format(swath))
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if minBurst == maxBurst:
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print('Skipping processing of swath {0}'.format(swath))
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continue
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secondaryBurstStart = self._insar.commonBurstStartSecondaryIndex[swath-1]
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catalog.addItem('Number of bursts - IW{0}'.format(swath), maxBurst - minBurst, 'fineoff')
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for mBurst in range(minBurst, maxBurst):
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###Corresponding secondary burst
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sBurst = secondaryBurstStart + (mBurst - minBurst)
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burst = secondary.bursts[sBurst]
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logger.info('IW{3} - Burst {1} of reference matched with Burst {2} of secondary'.format(mBurst-minBurst, mBurst, sBurst, swath))
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####Generate offsets for top burst
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rdict = {'lat': os.path.join(geomDir,'lat_%02d.rdr'%(mBurst+1)),
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'lon': os.path.join(geomDir,'lon_%02d.rdr'%(mBurst+1)),
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'hgt': os.path.join(geomDir,'hgt_%02d.rdr'%(mBurst+1)),
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'rangeOffName': os.path.join(outdir, 'range_%02d.off'%(mBurst+1)),
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'azOffName': os.path.join(outdir, 'azimuth_%02d.off'%(mBurst+1))}
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runGeo2rdr(burst, rdict, misreg_az=misreg_az, misreg_rg=misreg_rg)
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