def populateMetadata(self): """ Create the appropriate metadata objects from our CEOSFormat metadata """ frame = self._decodeSceneReferenceNumber( self.leaderFile.sceneHeaderRecord. metadata['Scene reference number']) try: rangePixelSize = Const.c / (2 * self.leaderFile.sceneHeaderRecord. metadata['Range sampling rate']) except ZeroDivisionError: rangePixelSize = 0 print( 'Average height: ', self.leaderFile.sceneHeaderRecord. metadata['Average terrain height in km']) ins = self.frame.getInstrument() platform = ins.getPlatform() platform.setMission(self.leaderFile.sceneHeaderRecord. metadata['Sensor platform mission identifier']) platform.setAntennaLength(self.constants['antennaLength']) platform.setPointingDirection(1) platform.setPlanet(Planet(pname='Earth')) ins.setRadarWavelength( self.leaderFile.sceneHeaderRecord.metadata['Radar wavelength']) ins.setIncidenceAngle(self.leaderFile.sceneHeaderRecord. metadata['Incidence angle at scene centre']) self.frame.getInstrument().setPulseRepetitionFrequency( self.leaderFile.sceneHeaderRecord. metadata['Pulse Repetition Frequency']) ins.setRangePixelSize(rangePixelSize) ins.setRangeSamplingRate( self.leaderFile.sceneHeaderRecord.metadata['Range sampling rate']) ins.setPulseLength( self.leaderFile.sceneHeaderRecord.metadata['Range pulse length']) # chirpPulseBandwidth = self.leaderFile.processingRecord.metadata['Pulse bandwidth code']*1e4 # ins.setChirpSlope(chirpPulseBandwidth/self.leaderFile.sceneHeaderRecord.metadata['Range pulse length']) ins.setChirpSlope(7.5e12) ins.setInPhaseValue(127.0) ins.setQuadratureValue(127.0) self.lineDirection = self.leaderFile.sceneHeaderRecord.metadata[ 'Time direction indicator along line direction'].strip() self.pixelDirection = self.leaderFile.sceneHeaderRecord.metadata[ 'Time direction indicator along pixel direction'].strip() ######RISAT-1 sensor orientation convention is opposite to ours # lookSide = self.leaderFile.processingRecord.metadata['Sensor orientation'] # if lookSide == 'RIGHT': # platform.setPointingDirection(1) # elif lookSide == 'LEFT': # platform.setPointingDirection(-1) # else: # raise Exception('Unknown look side') self.frame.setFrameNumber(frame) self.frame.setOrbitNumber( self.leaderFile.sceneHeaderRecord.metadata['Orbit number']) self.frame.setProcessingFacility( self.leaderFile.sceneHeaderRecord. metadata['Processing facility identifier']) self.frame.setProcessingSystem( self.leaderFile.sceneHeaderRecord. metadata['Processing system identifier']) self.frame.setProcessingSoftwareVersion( self.leaderFile.sceneHeaderRecord. metadata['Processing version identifier']) self.frame.setPolarization(self.constants['polarization']) self.frame.setNumberOfLines( self.imageFile.imageFDR.metadata['Number of lines per data set']) self.frame.setNumberOfSamples( self.imageFile.imageFDR. metadata['Number of pixels per line per SAR channel']) ###### self.frame.getOrbit().setOrbitSource('Header') self.frame.getOrbit().setOrbitQuality( self.leaderFile.platformPositionRecord. metadata['Orbital elements designator']) t0 = datetime.datetime(year=2000 + self.leaderFile.platformPositionRecord. metadata['Year of data point'], month=self.leaderFile.platformPositionRecord. metadata['Month of data point'], day=self.leaderFile.platformPositionRecord. metadata['Day of data point']) t0 = t0 + datetime.timedelta( seconds=self.leaderFile.platformPositionRecord. metadata['Seconds of day']) #####Read in orbit in inertial coordinates orb = Orbit() deltaT = self.leaderFile.platformPositionRecord.metadata[ 'Time interval between DATA points'] numPts = self.leaderFile.platformPositionRecord.metadata[ 'Number of data points'] for i in range(numPts): vec = StateVector() t = t0 + datetime.timedelta(seconds=i * deltaT) vec.setTime(t) dataPoints = self.leaderFile.platformPositionRecord.metadata[ 'Positional Data Points'][i] pos = [ dataPoints['Position vector X'], dataPoints['Position vector Y'], dataPoints['Position vector Z'] ] vel = [ dataPoints['Velocity vector X'], dataPoints['Velocity vector Y'], dataPoints['Velocity vector Z'] ] vec.setPosition(pos) vec.setVelocity(vel) orb.addStateVector(vec) #####Convert orbits from ECI to ECEF frame. t0 = orb._stateVectors[0]._time ang = self.leaderFile.platformPositionRecord.metadata[ 'Greenwich mean hour angle'] cOrb = ECI2ECR(orb, GAST=ang, epoch=t0) wgsorb = cOrb.convert() #####Extend the orbits by a few points planet = self.frame.instrument.platform.planet orbExt = OrbitExtender() orbExt.configure() orbExt._newPoints = 4 newOrb = orbExt.extendOrbit(wgsorb) orb = self.frame.getOrbit() for sv in newOrb: orb.addStateVector(sv)
def populateMetadata(self): """ Create the appropriate metadata objects from our CEOSFormat metadata """ frame = self._decodeSceneReferenceNumber( self.leaderFile.sceneHeaderRecord. metadata['Scene reference number']) fsamplookup = int(self.leaderFile.sceneHeaderRecord. metadata['Range sampling rate in MHz']) rangePixelSize = Const.c / (2 * self.fsampConst[fsamplookup]) ins = self.frame.getInstrument() platform = ins.getPlatform() platform.setMission(self.leaderFile.sceneHeaderRecord. metadata['Sensor platform mission identifier']) platform.setAntennaLength(self.constants['antennaLength']) platform.setPointingDirection(1) platform.setPlanet(Planet(pname='Earth')) if self.wavelength: ins.setRadarWavelength(float(self.wavelength)) # print('ins.radarWavelength = ', ins.getRadarWavelength(), # type(ins.getRadarWavelength())) else: ins.setRadarWavelength( self.leaderFile.sceneHeaderRecord.metadata['Radar wavelength']) ins.setIncidenceAngle(self.leaderFile.sceneHeaderRecord. metadata['Incidence angle at scene centre']) self.frame.getInstrument().setPulseRepetitionFrequency( self.leaderFile.sceneHeaderRecord. metadata['Pulse Repetition Frequency in mHz'] * 1.0e-3) ins.setRangePixelSize(rangePixelSize) ins.setRangeSamplingRate(self.fsampConst[fsamplookup]) ins.setPulseLength(self.leaderFile.sceneHeaderRecord. metadata['Range pulse length in microsec'] * 1.0e-6) chirpSlope = self.leaderFile.sceneHeaderRecord.metadata[ 'Nominal range pulse (chirp) amplitude coefficient linear term'] chirpPulseBandwidth = abs( chirpSlope * self.leaderFile.sceneHeaderRecord. metadata['Range pulse length in microsec'] * 1.0e-6) ins.setChirpSlope(chirpSlope) ins.setInPhaseValue(7.5) ins.setQuadratureValue(7.5) self.lineDirection = self.leaderFile.sceneHeaderRecord.metadata[ 'Time direction indicator along line direction'].strip() self.pixelDirection = self.leaderFile.sceneHeaderRecord.metadata[ 'Time direction indicator along pixel direction'].strip() ######ALOS2 includes this information in clock angle clockAngle = self.leaderFile.sceneHeaderRecord.metadata[ 'Sensor clock angle'] if clockAngle == 90.0: platform.setPointingDirection(-1) elif clockAngle == -90.0: platform.setPointingDirection(1) else: raise Exception( 'Unknown look side. Clock Angle = {0}'.format(clockAngle)) # print(self.leaderFile.sceneHeaderRecord.metadata["Sensor ID and mode of operation for this channel"]) self.frame.setFrameNumber(frame) self.frame.setOrbitNumber( self.leaderFile.sceneHeaderRecord.metadata['Orbit number']) self.frame.setProcessingFacility( self.leaderFile.sceneHeaderRecord. metadata['Processing facility identifier']) self.frame.setProcessingSystem( self.leaderFile.sceneHeaderRecord. metadata['Processing system identifier']) self.frame.setProcessingSoftwareVersion( self.leaderFile.sceneHeaderRecord. metadata['Processing version identifier']) self.frame.setPolarization(self.constants['polarization']) self.frame.setNumberOfLines( self.imageFile.imageFDR.metadata['Number of lines per data set']) self.frame.setNumberOfSamples( self.imageFile.imageFDR. metadata['Number of pixels per line per SAR channel']) ###### orb = self.frame.getOrbit() orb.setOrbitSource('Header') orb.setOrbitQuality(self.orbitElementsDesignator[ self.leaderFile.platformPositionRecord. metadata['Orbital elements designator']]) t0 = datetime.datetime(year=self.leaderFile.platformPositionRecord. metadata['Year of data point'], month=self.leaderFile.platformPositionRecord. metadata['Month of data point'], day=self.leaderFile.platformPositionRecord. metadata['Day of data point']) t0 = t0 + datetime.timedelta( seconds=self.leaderFile.platformPositionRecord. metadata['Seconds of day']) #####Read in orbit in inertial coordinates deltaT = self.leaderFile.platformPositionRecord.metadata[ 'Time interval between data points'] numPts = self.leaderFile.platformPositionRecord.metadata[ 'Number of data points'] orb = self.frame.getOrbit() for i in range(numPts): vec = StateVector() t = t0 + datetime.timedelta(seconds=i * deltaT) vec.setTime(t) dataPoints = self.leaderFile.platformPositionRecord.metadata[ 'Positional Data Points'][i] pos = [ dataPoints['Position vector X'], dataPoints['Position vector Y'], dataPoints['Position vector Z'] ] vel = [ dataPoints['Velocity vector X'], dataPoints['Velocity vector Y'], dataPoints['Velocity vector Z'] ] vec.setPosition(pos) vec.setVelocity(vel) orb.addStateVector(vec) ###This is usually available with ALOS SLC data. ###Unfortunately set to all zeros for ScanSAR data #self.doppler_coeff = [self.leaderFile.sceneHeaderRecord.metadata['Cross track Doppler frequency centroid constant term'], #self.leaderFile.sceneHeaderRecord.metadata['Cross track Doppler frequency centroid linear term'], #self.leaderFile.sceneHeaderRecord.metadata['Cross track Doppler frequency centroid quadratic term']] self.azfmrate_coeff = [ self.leaderFile.sceneHeaderRecord. metadata['Cross track Doppler frequency rate constant term'], self.leaderFile.sceneHeaderRecord. metadata['Cross track Doppler frequency rate linear term'], self.leaderFile.sceneHeaderRecord. metadata['Cross track Doppler frequency rate quadratic term'] ] ###Reading in approximate values instead ###Note that these are coeffs vs slant range in km self.doppler_coeff = [ self.leaderFile.sceneHeaderRecord. metadata['Doppler center frequency constant term'], self.leaderFile.sceneHeaderRecord. metadata['Doppler center frequency linear term'] ]
def testNotEqualCompare(self): """ Test that __cmp__ returns false when the times are different, but the positions and velocities are the same. """ sv1 = StateVector() time1 = datetime.datetime(year=2001, month=2, day=7, hour=12, minute=13, second=5) pos1 = [1.0, 2.0, 3.0] vel1 = [0.6, 0.6, 0.6] sv1.setTime(time1) sv1.setPosition(pos1) sv1.setVelocity(vel1) sv2 = StateVector() time2 = datetime.datetime(year=2001, month=2, day=7, hour=12, minute=13, second=4) pos2 = [1.0, 2.0, 3.0] vel2 = [0.6, 0.6, 0.6] sv2.setTime(time2) sv2.setPosition(pos2) sv2.setVelocity(vel2) self.assertFalse(sv1 == sv2)