Bernese GPS Software Version 5.0 - Bernese GNSS Software

10.6 Coordinate and Velocity Related Auxiliary Programs
COMPARISON OF COORDINATE FILES
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Total number of stations: 162
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Weekday Repeatability (mm)
Station #Days 0123456 N E U
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ALBH 40129M003 7 AAAAAAA 1.2 1.0 2.4
ALGO 40104M002 7 WWWWWWW 1.0 1.4 3.2
ALIC 50137M001 6 A AAAAA 0.9 1.7 3.4
ALRT 40162M001 7 AAAAAAA 1.1 0.7 3.5
.
.
.
ZIMZ 14001M005 3 AAA 1.0 1.7 2.1
ZWE2 12330M003 7 AAAAAAA 0.7 0.6 3.0
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# Coordinate estimates: 1070 4.7 1.6 4.7
10.6.4 Coordinate Comparisons
Figure 10.7: Example of a weekly summary file.
The main purpose of program COMPAR (”Menu>Service>Coordinate tools>Coordinate comparison”) is
to compare site coordinates from a list of input coordinate files. Mean station coordinates
may be computed in addition. To obtain weighted mean coordinates variance-covariance
information may be introduced. It is, however, recommended to use ADDNEQ2 for this
purpose which allows for much more flexibility for datum definition and parameter handling.
Stations may be selected by specifying a list of coordinate flags. The program output of
COMPAR provides the repeatability of the station coordinates without applying any transformation
of the individual input coordinates to a common frame. The respective program
output looks similar to the corresponding ADDNEQ2 output displayed in Figure 10.3. This
site coordinate repeatability output allows it to identify problems with particular stations.
Note, however, that the input coordinate files require a consistent definition of the geodetic
datum.
The repeatability RMS for each station may be written to a summary file (see Figure 10.7).
As this file is designed as a weekly summary file the number of columns for the flags displayed
is limited to seven. The RMS numbers however refer to all input coordinate files.
The program provides repeatability information for individual baselines if the corresponding
option in panel “COMPAR 3: Processing Options” in enabled. By default the statistics for all
pairs of stations is provided. In order to reduce the size of the output file and the computing
time it is recommended to specify a baseline definition file (description see Section 22.8.15)
in input field “Baseline definitions” in panel “COMPAR 1: Input Files” that specifies the baselines
of interest.
10.6.5 Merging Coordinate and Velocity Files
Program CRDMERGE (”Menu>Service>Coordinate tools>Merge coordinate files”) allows to merge several
coordinate or velocity files into a single coordinate resp. velocity file. Using a master file it is
possible to add new stations to an already existing file. If stations are present in more than
Bernese GPS Software Version 5.0 Page 235