Bernese GPS Software Version 5.0 - Bernese GNSS Software

22. Data Structure
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TITLE : Conversion of STD-orbit file into ASCII
CREATE: 07-JAN-04 09:44
INTEGR: 1.00000 10 6.00000 12
NUTSUB: IAU80 IERS2000
GRAVIT: JGM-3 12
38 24 10
1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 18 20 21 23 24 25 26 27
28 29 30 31103117118121122123124105 22 52
UP2004.006
5.3010000000000000E+04 2.0000000000000000
5.3010000000000000E+04
5.3010041666666664E+04
5.3010083333333336E+04
...
5.3010958333333336E+04
5.3011000000000000E+04
2.6557971550620001E+07
5.4645659999999997E-03
0.9777242716317193
1.0362597403608640
4.5790799264559272
1.6090326590102526
2.0347582948916021E+04
2.6563029231750000E+07
...
Figure 22.21: Standard orbits (STD/FSO file).
Created by: ORBGEN (”Menu>Orbits/EOP>Create standard orbits”).
Used by: Some orbit programs (e.g., STDDIF (”Menu>Orbits/EOP>Compare orbits>Standard orbits”))
and the processing programs (”Menu>Processing”).
Example: Figure 22.21 (ASCII example).
A standard orbit contains all the information to compute position, velocity, and higher time
derivatives for each satellite. The orbit is stored in the form of polynomial coefficients (one
set of coefficients for typically 1 hour). One standard orbit file may contain several arcs
per satellite. For additional information we refer to Chapter 5. The format is binary. To
transform it to ASCII and back to binary (e.g., to allow a transfer to a different computer
platform) use the programs STDFMT and FMTSTD (”Menu>Conversion>Orbit files>Binary to ASCII”
and ”Menu>Conversion>Orbit files>ASCII to binary”) (default extension for the ASCII files: FSO).
Nutation and subdaily pole model names are saved in the file in order to allow for consistency
checks. Old files are accepted. Because they do not contain an entry for these models, we
assume IAU80 and RAY 96 respectively.
22.7.5 Radiation Pressure Coefficient File
Type: Binary
Directory: Campaign-specific directory ORB.
Extension: RPR
Content: Radiation pressure coefficients and partial derivatives of the satellite positions
with respect to the radiation pressure coefficients. The partial derivatives of
the satellite positions with respect to the Keplerian elements referring to the
beginning of the arc are contained in this file, too.
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