Bernese GPS Software Version 5.0 - Bernese GNSS Software

20.4 Description of the Processing Examples
changing the PCF variables V PLUS and V MINUS. Amongst others the program provides
an overview of the coordinate repeatability between subsequent sessions. The
output and summary file created in this step are included in the processing summary.
A bad repeatability indicates possible environmental, station, or processing problems.
It also may be caused by geophysical phenomena (e.g., Earthquake).
PID 514 HELMR1: The estimated coordinates of all involved fiducial sites are verified by
the means of a three parameter Helmert transformation. If discrepancies are detected
– based on the options in “HELMR1 3: Outlier Rejection” – the solution is recomputed
starting over from PID 511 with a reduced set of fiducial sites. The output file from
HELMR1 is included in the processing summary and may be helpful to identify problems
concerning the reference sites and datum definition in general. The three translation
components should be zero, the residuals below 1 cm. Rejected reference sites
are listed.
PID 521 ADDNEQ2: A size reduced normal equation file is produced by pre-eliminating
the troposphere parameters and horizontal gradients from the system. Thus, only
coordinate parameters remain in the resulting normal equation file.
PID 522 GPSXTR: A summary is extracted from the output of the final solution. It is listed
in the processing summary (solution name R1 yyssss). The a posteriori rms value
should be the same as in PID 512.
The first GPSEST is used to create normal equations, only. No other result files are written.
The final coordinate and troposphere results are computed with program ADDNEQ2 due to
its more sophisticated datum definition capabilities. The final SINEX file should only contain
coordinates and is therefore written during the size reduction step, where the troposphere
parameters are pre-eliminated. The fiducial site verification loop (PIDs 511–514) is repeated
until all reference stations are accepted or until only one station remains. If you want to
rely on only one station for datum definition, step PID 514 may be skipped.
Further reading: Chapter 7: Parameter Estimation (page 139), Chapter 9: Combination of
Solutions (page 183), Chapter 10: Station Coordinates and Velocities (page 211). Chapter
11: Troposphere Modeling and Estimation (page 239). Section 10.6.4: Coordinate
Comparisons (page 235), Section 19.5.4: Script Parameters and BPE Variables (page 394),
Section 10.6.2: Helmert Transformation (page 232), Section 19.12.3: Rejecting Stations from
the Definition of the Geodetic Datum (page 422).
20.4.2.7 Create Summary File, Save Results, and Delete Files, end of BPE
In the last part of the PCF an analysis protocol is created, results are saved, and dispensable
output files are removed. No Bernese programs are started here, anymore. A similar sequence
of scripts will most probably complete all your PCFs.
Bernese GPS Software Version 5.0 Page 445