2019-01-16 19:40:08 +00:00
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# Author: Piyush Agram
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# Copyright 2016
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#
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import logging
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import isceobj
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import mroipac
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import os
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logger = logging.getLogger('isce.topsinsar.runPreprocessor')
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def runComputeBaseline(self):
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from isceobj.Planet.Planet import Planet
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import numpy as np
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swathList = self._insar.getInputSwathList(self.swaths)
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commonBurstStartMasterIndex = [-1] * self._insar.numberOfSwaths
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commonBurstStartSlaveIndex = [-1] * self._insar.numberOfSwaths
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numberOfCommonBursts = [0] * self._insar.numberOfSwaths
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catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
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for swath in swathList:
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masterxml = os.path.join( self._insar.masterSlcProduct,'IW{0}.xml'.format(swath))
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slavexml = os.path.join( self._insar.slaveSlcProduct, 'IW{0}.xml'.format(swath))
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if os.path.exists(masterxml) and os.path.exists(slavexml):
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master = self._insar.loadProduct(masterxml)
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slave = self._insar.loadProduct(slavexml)
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burstOffset, minBurst, maxBurst = master.getCommonBurstLimits(slave)
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commonSlaveIndex = minBurst + burstOffset
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numberCommon = maxBurst - minBurst
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if numberCommon == 0:
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print('No common bursts found for swath {0}'.format(swath))
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else:
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###Bookkeeping
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commonBurstStartMasterIndex[swath-1] = minBurst
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commonBurstStartSlaveIndex[swath-1] = commonSlaveIndex
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numberOfCommonBursts[swath-1] = numberCommon
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catalog.addItem('IW-{0} Number of bursts in master'.format(swath), master.numberOfBursts, 'baseline')
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catalog.addItem('IW-{0} First common burst in master'.format(swath), minBurst, 'baseline')
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catalog.addItem('IW-{0} Last common burst in master'.format(swath), maxBurst, 'baseline')
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catalog.addItem('IW-{0} Number of bursts in slave'.format(swath), slave.numberOfBursts, 'baseline')
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catalog.addItem('IW-{0} First common burst in slave'.format(swath), minBurst + burstOffset, 'baseline')
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catalog.addItem('IW-{0} Last common burst in slave'.format(swath), maxBurst + burstOffset, 'baseline')
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catalog.addItem('IW-{0} Number of common bursts'.format(swath), numberCommon, 'baseline')
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refElp = Planet(pname='Earth').ellipsoid
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Bpar = []
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Bperp = []
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for boff in [0, numberCommon-1]:
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###Baselines at top of common bursts
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mBurst = master.bursts[minBurst + boff]
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sBurst = slave.bursts[commonSlaveIndex + boff]
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###Target at mid range
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tmid = mBurst.sensingMid
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rng = mBurst.midRange
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masterSV = mBurst.orbit.interpolate(tmid, method='hermite')
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target = mBurst.orbit.rdr2geo(tmid, rng)
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slvTime, slvrng = sBurst.orbit.geo2rdr(target)
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slaveSV = sBurst.orbit.interpolateOrbit(slvTime, method='hermite')
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targxyz = np.array(refElp.LLH(target[0], target[1], target[2]).ecef().tolist())
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mxyz = np.array(masterSV.getPosition())
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mvel = np.array(masterSV.getVelocity())
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sxyz = np.array(slaveSV.getPosition())
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2020-06-04 00:24:09 +00:00
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mvelunit = mvel / np.linalg.norm(mvel)
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sxyz = sxyz - np.dot ( sxyz-mxyz, mvelunit) * mvelunit
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2019-01-16 19:40:08 +00:00
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aa = np.linalg.norm(sxyz-mxyz)
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costheta = (rng*rng + aa*aa - slvrng*slvrng)/(2.*rng*aa)
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Bpar.append(aa*costheta)
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perp = aa * np.sqrt(1 - costheta*costheta)
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direction = np.sign(np.dot( np.cross(targxyz-mxyz, sxyz-mxyz), mvel))
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Bperp.append(direction*perp)
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catalog.addItem('IW-{0} Bpar at midrange for first common burst'.format(swath), Bpar[0], 'baseline')
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catalog.addItem('IW-{0} Bperp at midrange for first common burst'.format(swath), Bperp[0], 'baseline')
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catalog.addItem('IW-{0} Bpar at midrange for last common burst'.format(swath), Bpar[1], 'baseline')
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catalog.addItem('IW-{0} Bperp at midrange for last common burst'.format(swath), Bperp[1], 'baseline')
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else:
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print('Skipping processing for swath number IW-{0}'.format(swath))
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self._insar.commonBurstStartMasterIndex = commonBurstStartMasterIndex
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self._insar.commonBurstStartSlaveIndex = commonBurstStartSlaveIndex
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self._insar.numberOfCommonBursts = numberOfCommonBursts
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if not any([x>=2 for x in self._insar.numberOfCommonBursts]):
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print('No swaths contain any burst overlaps ... cannot continue for interferometry applications')
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catalog.printToLog(logger, "runComputeBaseline")
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self._insar.procDoc.addAllFromCatalog(catalog)
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