References

to Data Formats, used within the CHAMP Project

Christoph Förste, GFZ Potsdam, 25. June 2001

1)    RINEX format
For format definition and details see: W. Gurtner: RINEX - The Receiver Independent Exchange Format Version 2.10. This document is available via Internet at:

ftp://cddisa.gsfc.nasa.gov/pub/formats/rinex210.format

The CHAMP GPS-SST data (i.e. CH-OG-1-SST) are presently given in the Rinex 2.10 format plus some additional observables (Phase measurement at L1, Signal-to-noise ration of the CA channel) which couldn't be expressed in the present Rinex format definition in the past. This extensions are described at:

http://www-app2.gfz-potsdam.de/pb1/op/champ/docs_CHAMP/CH-RINEX-EXT.html
 

Meanwhile some modifications for the Rinex format definition are proposed to accommodate Low Earth Orbiter Data (e.g. CHAMP) and to adopt the additional observables mentioned above. This is described in: W. Gurtner: RINEX Version 2.20 - Modifications to Accommodate Low Earth Orbiter Data, available at:

ftp://cddisa.gsfc.nasa.gov/pub/formats/rinex220.format
 

GFZ Potsdam will switch to Rinex 2.20 instead of Rinex 2.10 for the GPS SST data soon. This will be announced in a newsletter.

The CHAMP Orbit Data Products will be distributed using the CHAMP Orbit Format which is described at:

http://www-app2.gfz-potsdam.de/pb1/op/champ/docs_CHAMP/CH-GFZ-FD-002.pdf

For format definition and details see: The NGS GPS Orbital Formats. This document and further information are availabe via Internet at:

ftp://cddisa.gsfc.nasa.gov/pub/formats/sp3.format

For ther format definition and details see: SINEX - Solution (Software/technique) INdependent EXchange Format Version 1.00 (June 30, 1996). This document is availabe via Internet at:
 

http://www.dgfi.badw-muenchen.de/gps/sinex.html

or:

ftp://cddisa.gsfc.nasa.gov/pub/formats/sinex1.format

The Common Data Format is a binary data representation, developed for geophysical measurement data. The creation and handling of this data types is based on special CDF-software tools. For details see:

http://nssdc.gsfc.nasa.gov/cdf/manual/cdf25ug.html

The special application to the CHAMP magnetic field products are described at the following links:

For Scalar Magnetometer Data:
http://www-app2.gfz-potsdam.de/pb1/op/champ/docs_CHAMP/CH-OVM-DATA-FORMAT.html
 

For Vector Magnetometer Data:
http://www-app2.gfz-potsdam.de/pb1/op/champ/docs_CHAMP/CH-FGM-DATA-FORMAT.html

http://www-app2.gfz-potsdam.de/pb1/op/champ/docs_CHAMP/CH-GFZ-FD-001.pdf

The CHAMP Gravity Field Solution data are expressed using the following data formates:

• SHM-Format (Earth Gravity Spherical Harmonic Model Format)
• CORREGM-format (Correlation Matrix Format, Earth Gravity Field Model)
• OTI-Format (Ocean/Atmosphere Tide Format)
• CORROTI-Format (Correlation Matrix Format, Ocean Tides)
• Orbit and Gravity Field Low Level Data Formats