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Bernese GPS Software Version 5.0 - Bernese GNSS Software

Bernese GPS Software Version 5.0 - Bernese GNSS Software

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17. Data Simulation Tool <strong>GPS</strong>SIM<br />

17.3 Supported Input Files<br />

Figure 17.1 (panel “<strong>GPS</strong>SIM 1: Filenames”) shows all supported input files. Only a few of them<br />

are mandatory, the standard orbit, pole file, and the station coordinates.<br />

Observations are simulated for all satellites contained in the standard orbit. The satellite<br />

problem file (panel “<strong>GPS</strong>SIM 1.1: General Files”) is used to handle maneuvers but not to<br />

remove satellites from the simulation. Satellites may be removed later using SATMRK or by<br />

introducing a satellite problem file in <strong>GPS</strong>EST.<br />

Station positions are defined in a coordinate file. The same models as in <strong>GPS</strong>EST apply<br />

for station motion due to solid Earth and pole tides. Furthermore, ocean loading tables<br />

may be introduced. If data for a kinematic station should be simulated, a corresponding file<br />

containing the kinematic positions must be selected. Antenna orientations can be considered,<br />

as well.<br />

By default satellite as well as receiver clocks are set to zero for all epochs. Other values may<br />

be introduced, though. Satellite clock corrections may be introduced via a <strong>Bernese</strong> satellite<br />

clock file (either containing epoch-wise values or polynomial coefficients). The receiver clock<br />

behavior can be defined in a receiver clocks file (see Section 22.7.12 for description and<br />

example).<br />

A file containing satellite- and station-specific P1−C1 and P1−P2 differential code biases<br />

may be selected in panel “<strong>GPS</strong>SIM 1: Filenames”. In order to apply these biases to the codes<br />

on both carriers a receiver information file (see Section 22.4.3) specifying the tracking technology<br />

of receivers must be given in panel “<strong>GPS</strong>SIM 1.1: General Files”.<br />

Figure 17.1: Filenames for <strong>GPS</strong>SIM.<br />

Page 348 AIUB

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