example2.py

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#!/usr/bin/env python
 
"""
A GNSSTk example of reading a RINEX obs file.
 
This is a semi-port of the older C++ example2.cpp.
Usage:
  python example2.py
 
"""
 
import gnsstk
 
 
def main():
    rfn = gnsstk.getPathData() + '/test_input_rinex2_obs_RinexObsFile.06o'
    header, data = gnsstk.readRinex3Obs(rfn, strict=True)
 
    # Let's pretend we want to change something in the header
    # (otherwise this would be a two-line example!)
    header.receiverOffset = 47
 
    # Now let's find the earliest and latest observations
    # function for how to compare Rinex3ObsData objects for min/max functions:
    timeFunction = lambda self: self.time
    earliest = min(data, key=timeFunction)
    latest = max(data, key=timeFunction)
 
    print 'Earliest time found:', gnsstk.CivilTime(earliest.time)
    print 'Latest time found:  ', gnsstk.CivilTime(latest.time)
 
    # Now let's write it all back to a different file
    gnsstk.writeRinex3Obs( 'rinex3obs_data.txt.new', header, data)
 
if __name__ == '__main__':
    main()