Bernese GPS Software Version 5.0 - Bernese GNSS Software

19.12 Bernese Program Options for Automated Processing
The list of selected files can be used for baseline file creation in program SNGDIF. In contrast
to RNXGRA program MKCLUS takes care on observations that are marked by the
preprocessing in the Bernese observation files (e.g., in a zero-difference MAUPRP-run or in
RNXSMT).
19.12.1.5 Selection of Baselines for Processing
The program BASLST (”Menu>Service>Automated processing>Select baselines”) selects a set of Bernese
baseline observation files using the length, the percentage of resolved ambiguities, or the
receiver type of the stations as criteria. This is particularly useful to define the baselines for
the different ambiguity resolution strategies (see Chapter 8) in an automatic processing.
19.12.2 Forming Clusters of Observation Files
If a network with a lot of stations (baselines) has to be processed not all observation files
can be processed in one GPSEST run. In that case the observation files may be grouped into
clusters and processed independently. The normal equations of the individual clusters may
be combined using the program ADDNEQ2 for most of the non-epoch parameters. Clock
estimates from a zero-difference processing can be combined with the program CCRNXC.
19.12.2.1 Clusters of Bernese Baseline Observation Files
If the “Correlation strategy” in the program GPSEST is not set to CORRECT the clustering of
the baseline observation files has no impact on the solution because all correlations between
the baselines are ignored. A simple method (initPar Bl or initPar Cl) from the Perl
module ${BPE}/bpe uitil.pm can be applied to form the clusters, see Section 19.6.5.2.
If the CORRECT “Correlation strategy” is selected all baselines of a region should be processed
together in one cluster in order to consider a maximum of correlations. The Bernese GPS
Software offers two possibilities for clustering baseline observation files in an automated
processing mode:
(1) A cluster file (default extension CLU, see Section 22.8.16 for a file format description)
is used when forming the baselines in the program SNGDIF. The cluster number of
the first station in a baseline defines to which cluster the baseline belongs to. See
Section 6.4 for more details.
(2) A number of baseline observation files can be assigned to regional clusters using the
program MKCLUS. No cluster file is necessary in this case. Those baselines grouped to
a cluster for which the distances between all stations is minimal. Either the maximum
number of baselines per cluster or the number of clusters can be specified in the
program input panel “MKCLUS 3: Regional Cluster Definition Options (Single Differences)”.
19.12.2.2 Regional Clusters for the Zero-Difference Processing
Processing zero-difference observation files in regional clusters is useful, e.g., for the computation
of post-fit residuals for data screening. In that case the number of stations observing
the same satellites should be as big as possible. The reliability of the computed residuals
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