68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
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#!/usr/bin/env python3
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import numpy as np
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import argparse
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import os
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import isce
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import isceobj
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import datetime
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import shelve
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import matplotlib.pyplot as plt
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def cmdLineParse():
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'''
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Command line parser.
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'''
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parser = argparse.ArgumentParser( description='Generate offset field between two Sentinel swaths')
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parser.add_argument('-m', type=str, dest='master', required=True,
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help='Directory with the master image')
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parser.add_argument('-a', '--az', type=float, dest='azshift', default=0.0,
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help='Azimuth shift to add in lines')
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parser.add_argument('-r', '--rg', type=float, dest='rgshift', default=0.0,
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help='Range shift to add in pixels')
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return parser.parse_args()
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if __name__ == '__main__':
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'''
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Generate offset fields burst by burst.
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'''
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inps = cmdLineParse()
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mdb = shelve.open( os.path.join(inps.master, 'data'), flag='r')
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mFrame = mdb['frame']
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mdb.close()
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print('Before: ')
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print('t0: ', mFrame.sensingStart)
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print('r0: ', mFrame.startingRange)
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deltat = datetime.timedelta(seconds = inps.azshift/ mFrame.PRF)
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mFrame.sensingStart += deltat
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mFrame.sensingMid += deltat
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mFrame.sensingStop += deltat
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deltar = inps.rgshift * mFrame.instrument.rangePixelSize
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mFrame.startingRange += deltar
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mdb = shelve.open( os.path.join(inps.master, 'data'), writeback=True)
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mdb['frame'] = mFrame
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mdb.close()
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mdb = shelve.open(os.path.join(inps.master, 'data'), flag='r')
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mFrame = mdb['frame']
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mdb.close()
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print('After: ')
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print('t0: ', mFrame.sensingStart)
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print('r0: ', mFrame.startingRange)
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