Defects Index | Documentation Table of Contents
03/08/99 13:00 DEFECT in program GPSCOM
SYMPTOM: The Gpscom output Sinex file has 'null' antenna names.
PROBLEM: Gpscom was not initializing the list of antenna names when
it was not given an antenna calibration file. This problem
--does not-- exist if the antenna calibration file is given.
CORRECTION: Correct Gpscom to always initialize the array.
This fix fixes the program bug. To ensure completely correct
antenna names in the Sinex file, see notes below.
FOUND BY: Neil Weston and Bill Dillinger
FIXED BY: Bill Dillinger
VERSION: 9903.08
SOURCE: /g1/HPUX.10/Src/Gpscom/
EXECUTABLE: /ngslib/hpux/bin/gpscom
NOTES: The numerical results produced by Gpscom where correct
in the older version of the program, even in the presence
of this problem . Only the antenna names given in the Sinex
file were affected. This was because the offesets needed to
compute final coordinates were provided by the site_info file.
HOWEVER, given changes to the site_info file recently requested
to remove antenna offset information. In the very near future
correct coordinate values can only be provided by
program Gpscom if a correct antenna calibration file is provided.
Therefore please provide GPSCOM with the following information
or the equivalent in the gpscom.pdf file.
ANTENNA PHASE CORR
/ngslib/data/GPS/ant_info.001
990308.gpscom
June 25, 1999
Steve Hilla