Bernese GPS Software Version 5.0 - Bernese GNSS Software

17. Data Simulation Tool GPSSIM
17.3 Supported Input Files
Figure 17.1 (panel “GPSSIM 1: Filenames”) shows all supported input files. Only a few of them
are mandatory, the standard orbit, pole file, and the station coordinates.
Observations are simulated for all satellites contained in the standard orbit. The satellite
problem file (panel “GPSSIM 1.1: General Files”) is used to handle maneuvers but not to
remove satellites from the simulation. Satellites may be removed later using SATMRK or by
introducing a satellite problem file in GPSEST.
Station positions are defined in a coordinate file. The same models as in GPSEST apply
for station motion due to solid Earth and pole tides. Furthermore, ocean loading tables
may be introduced. If data for a kinematic station should be simulated, a corresponding file
containing the kinematic positions must be selected. Antenna orientations can be considered,
as well.
By default satellite as well as receiver clocks are set to zero for all epochs. Other values may
be introduced, though. Satellite clock corrections may be introduced via a Bernese satellite
clock file (either containing epoch-wise values or polynomial coefficients). The receiver clock
behavior can be defined in a receiver clocks file (see Section 22.7.12 for description and
example).
A file containing satellite- and station-specific P1−C1 and P1−P2 differential code biases
may be selected in panel “GPSSIM 1: Filenames”. In order to apply these biases to the codes
on both carriers a receiver information file (see Section 22.4.3) specifying the tracking technology
of receivers must be given in panel “GPSSIM 1.1: General Files”.
Figure 17.1: Filenames for GPSSIM.
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