69 lines
2.8 KiB
Python
69 lines
2.8 KiB
Python
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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 datetime
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import logging
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from isceobj.Orbit.Orbit import Orbit
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logger = logging.getLogger('isce.insar.runPulseTiming')
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def runPulseTiming(self):
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reference = self.insar.referenceFrame
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secondary = self.insar.secondaryFrame
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# add orbits to main object -law of demeter pls.
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self.insar.referenceOrbit = pulseTiming(reference, self.insar.procDoc, 'reference')
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self.insar.secondaryOrbit = pulseTiming(secondary, self.insar.procDoc, 'secondary')
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return None
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def pulseTiming(frame, catalog, which):
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logger.info("Pulse Timing")
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numberOfLines = frame.getNumberOfLines()
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prf = frame.getInstrument().getPulseRepetitionFrequency()
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pri = 1.0 / prf
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startTime = frame.getSensingStart()
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orbit = frame.getOrbit()
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pulseOrbit = Orbit(name=which+'orbit')
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startTimeUTC0 = (startTime -
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datetime.datetime(startTime.year,
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startTime.month,startTime.day)
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)
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timeVec = [pri*i +
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startTimeUTC0.seconds +
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10**-6*startTimeUTC0.microseconds for i in range(numberOfLines)
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]
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catalog.addItem("timeVector", timeVec, "runPulseTiming.%s" % which)
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for i in range(numberOfLines):
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dt = i * pri
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time = startTime + datetime.timedelta(seconds=dt)
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sv = orbit.interpolateOrbit(time, method='hermite')
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pulseOrbit.addStateVector(sv)
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return pulseOrbit
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