Bernese GPS Software Version 5.0 - Bernese GNSS Software

19. Bernese Processing Engine (BPE)
19.12.1.2 Exclude Observation File while Importing from RINEX Format
The next program that can exclude observation files is RXOBV3 (description in Section
4.2.3). For the automatic processing we recommend to set the “ACTIONS IN CASE OF
INCONSISTENCIES” for all relevant checks of the correctness of the RINEX header information
to SKIP. In case of an inconsistency the corresponding RINEX file is then not converted
to Bernese format. Furthermore, no data from a RINEX file are imported if it contains less
than a “Minimum number of epochs requested per file”. Stations that have been excluded in the
section TYPE 003: HANDLING OF STATION PROBLEMS of the station information file are also
automatically excluded from the data import.
19.12.1.3 Exclude Stations with Problems in the Data Preprocessing
Stations with problems in one of the preprocessing steps should be excluded from the further
processing in a robust automatic processing. In the case of the receiver clock synchronization
(program CODSPP, see Section 6.3) and the preprocessing of phase observations (program
MAUPRP, see Section 6.5) the corresponding extraction programs (CODXTR and MPRXTR)
check the results and can generate a file with a list of Bernese observation files that have to
be deleted to prevent problems in further processing steps. For more details we refer to the
description of these program in Chapter 6.
The program RESCHK (description in Section 6.6.3) can detect bad stations from the summary
table of the program RESRMS that is generated from post-fit residuals (usually from
the program GPSEST). The program generates a deletion list containing the observation
files from the detected misbehaving stations.
In case of bad stations in a network of baselines usually the entire network has be to
rebuild using the program SNGDIF after deleting the zero-difference observation files of the
misbehaving station.
19.12.1.4 Selection of Stations for Processing
The program MKCLUS (”Menu>Service>Automated processing>Form clusters”) defines clusters for the
processing of Bernese zero-difference or baseline observation files. A special application is
the selection of a predefined number of Bernese zero-difference observation files for a single
cluster. Select GLOBAL in option “Strategy for zero difference observations” to get an optimum
distribution of the stations following one of the criteria:
• GEOMETRY: optimize the distribution of the stations using the maximum sum of the
squared distances between the stations.
• DENSITY: minimize the redundancy of observations from the stations for each satellite
and epoch (This may consume a lot of computing time because for the station selection
all Bernese observation files have to read several times.)
• NUM.OBS: select the observation files with the biggest number of observations.
• CLOCKS: select the best clocks (smallest RMS of a linear fit in the input file “Linear fit
RMS of station clocks” that may be generated by program CCRNXC).
Further conditions (e.g., “Minimum number of observations per file” and “Maximum number of
ambiguities per file”) may be defined for all selected files.
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