Bernese GPS Software Version 5.0 - Bernese GNSS Software

20. Processing Examples
Further reading: Chapter 9: Combination of Solutions (page 183), Chapter 7: Parameter
Estimation (page 139), Chapter 8: Initial Phase Ambiguities and Ambiguity Resolution
(page 167), Section 19.12.1.5: Selection of Baselines for Processing (page 421), Section 12.5:
Stochastic Ionosphere Modeling Technique (page 275), Section 19.5.2: Parallel Processing
(page 391).
20.4.2.6 Compute ambiguity-Fixed Network Solution, Create Final NEQ/SNX/TRO Files
The observation files are cleaned and most of the ambiguities are resolved to their integer
values. Now we are ready to compute the final ambiguity fixed solution. The results are
stored in Bernese and (tropospheric) SINEX format. A special feature of this PCF part is
the automatic detection of fiducial site problems followed by a possible recomputation of
the results.
#
# Compute ambiguity-fixed network solution, create final NEQ/SNX/TRO files
# ------------------------------------------------------------------------
501 GPSEST R2S_FIN ANY 1 413
511 ADDNEQ2 R2S_FIN ANY 1 501
512 GPSXTR R2S_FIN ANY 1 511
513 COMPAR R2S_FIN ANY 1 512
514 HELMR1 R2S_FIN ANY 1 513
521 ADDNEQ2 R2S_RED ANY 1 514
522 GPSXTR R2S_RED ANY 1 521
PID 501 GPSEST: An ambiguity fixed solution is computed and normal equation information
is stored. Estimated parameters include coordinates, zenith path delays, and
horizontal tropospheric gradients. The coordinates of the fiducial sites are not fixed.
Otherwise they wouldn’t be contained in the resulting normal equation system and
would be lost to further manipulation with ADDNEQ2.
Note when processing your own data: This is the final analysis of the observation files
where all correlations between the different baselines are considered correctly. For that
reason it is preferable to process all data together. Depending on the number of stations
and the available computing resources, you have to split up your network into
clusters for parallel processing (see Section 9.5.1 for details).
PID 511 ADDNEQ2: Based on the normal equations from the previous GPSEST run, a final
solution is computed. The datum definition is realized by three no-net-translation
conditions imposed on a set of fiducial sites (IGS00 reference coordinates). These
stations are taken from the file REFyyssss.FIX.
The tropospheric SINEX file contains only zenith path delay values (in consequence
of the TRO data format) and no tropospheric gradient information.
PID 512 GPSXTR: Creates a short overview of the ambiguity fixed network solution from
ADDNEQ2 which is included in the processing summary (solution name F1 yyssss).
The a posteriori rms value should not exceed about 1.5 mm.
PID 513 COMPAR: Compares the estimated coordinate set with results from previous sessions.
The number of sessions covered by that sliding comparison can be adjusted by
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