101 lines
4.0 KiB
Python
Executable File
101 lines
4.0 KiB
Python
Executable File
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# Copyright 2012 California Institute of Technology. ALL RIGHTS RESERVED.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# United States Government Sponsorship acknowledged. This software is subject to
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# U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
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# (No [Export] License Required except when exporting to an embargoed country,
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# end user, or in support of a prohibited end use). By downloading this software,
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# the user agrees to comply with all applicable U.S. export laws and regulations.
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# The user has the responsibility to obtain export licenses, or other export
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# authority as may be required before exporting this software to any 'EAR99'
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# embargoed foreign country or citizen of those countries.
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#
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# Author: Brett George
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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import logging
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import stdproc
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import sys
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logger = logging.getLogger('isce.insar.runFdMocomp')
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## Mapping from use_dop kewword to f(referenceDop, secondaryDrop)
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USE_DOP = {'AVERAGE' : lambda x, y: (x+y)/2.,
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'REFERENCE': lambda x, y: x,
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'SECONDARY': lambda x, y: y}
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def runFdMocomp(self, use_dop="average"):
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"""
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Calculate motion compenstation correction for Doppler centroid
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"""
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H1 = self.insar.fdH1
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H2 = self.insar.fdH2
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peg = self.insar.peg
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lookSide = self.insar._lookSide
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referenceOrbit = self.insar.referenceOrbit
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secondaryOrbit = self.insar.secondaryOrbit
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rangeSamplingRate = (
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self.insar.getReferenceFrame().instrument.rangeSamplingRate)
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rangePulseDuration = (
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self.insar.getSecondaryFrame().instrument.pulseLength)
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chirpExtension = self.insar.chirpExtension
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chirpSize = int(rangeSamplingRate * rangePulseDuration)
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number_range_bins = self.insar.numberRangeBins
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referenceCentroid = self.insar.referenceDoppler.fractionalCentroid
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secondaryCentroid = self.insar.secondaryDoppler.fractionalCentroid
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logger.info("Correcting Doppler centroid for motion compensation")
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result = []
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for centroid, frame, orbit, H in zip((referenceCentroid, secondaryCentroid),
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(self.insar.referenceFrame,
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self.insar.secondaryFrame),
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(referenceOrbit, secondaryOrbit),
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(H1, H2)
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):
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fdmocomp = stdproc.createFdMocomp()
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fdmocomp.wireInputPort(name='frame', object=frame)
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fdmocomp.wireInputPort(name='peg', object=peg)
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fdmocomp.wireInputPort(name='orbit', object=orbit)
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fdmocomp.setWidth(number_range_bins)
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fdmocomp.setSatelliteHeight(H)
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fdmocomp.setDopplerCoefficients([centroid, 0.0, 0.0, 0.0])
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fdmocomp.setLookSide(lookSide)
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fdmocomp.fdmocomp()
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result.append( fdmocomp.dopplerCentroid )
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pass
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referenceDopplerCorrection, secondaryDopplerCorrection = result
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# print referenceDopplerCorrection, secondaryDopplerCorrection
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# use_dop = "F"
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try:
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fd = USE_DOP[use_dop.upper()](referenceDopplerCorrection,
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secondaryDopplerCorrection)
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except KeyError:
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print("Unrecognized use_dop option. use_dop = ",use_dop)
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print("Not found in dictionary:",USE_DOP.keys())
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sys.exit(1)
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pass
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logger.info("Updated Doppler Centroid: %s" % (fd))
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return fd
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