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Editorial
As announced in Newsletter No.1 one day's worth of CHAMP
instrument data is made available to the community for first
use. The sample data set comprises GPS-CHAMP satellite-to-satellite
tracking, accelerometer, star camera and scalar and vector
magnetometer data. For geolocation, a CHAMP orbit file is provided together with the data.
Radio occultation data will have to be provided at a later date,
because the required JPL GPS software update is not yet available for
uploading. The same holds for the Digital Ion Drift Meter
because AFRL is still investigating a suitable measurement mode.
The release of these sample data shall enable the users to get acquainted with the formats, structures and characteristics of the CHAMP standard product files, being regularly accessible after spring next year with
the end of CHAMP's calibration and accomodation phase. It has to be
noted that the given data still have to be considered as engineering
ones, i.e. the evaluation of the data quality, preprocessing and data
editing procedures are still under investigation and in progress. Also, the accuracy of the provided CHAMP orbit does not yet reflect the ongoing process of optimising CHAMP's precise orbit determination.
We have tried to provide all information needed to process the data.
We would ask the users not to contact the CHAMP project staff with
detailed questions, but use the
IGS Leo Pilot Project Meeting end of January 2001 for necessary clarification.
Christoph Reigber, CHAMP Project Director
CHAMP sample data set
The sample products contain CHAMP data from day 220 in 2000 (August 7, 2000). The data files, format descriptions and conventions are available via anonymous ftp
from GFZ's ftp server.
| ftp address: | ftp.gfz-potsdam.de |
| Account: | anonymous |
| Password: | your email address |
| Path: | pub/champ/chftp1/public |
Go to ftp.gfz-potsdam.de/pub/champ/chftp1/public
The ftp directory contains the following data:
Data product files:
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| CH-OG-1-SST+ ... .rnx | CHAMP GPS-SST data
(conventional Rinex format, including CHAMP extensions) |
| CH-OG-2-ACC+ ... .dat | Preprocessed CHAMP accelerometer data, including thruster events and
body star camera data (quaternions), given in the CHAMP data format |
| CH-ME-2-ASC-BOOM+ ... .dat | Preprocessed and calibrated attitude data (quaternions) from the boom star
cameras (CHAMP data format) |
| CH-ME-2-OVM+ ... .cdf | Overhauser Magnetometer Data (CDF-format) |
| CH-ME-2-FGM-SC+ ... .cdf | Fluxgate Magnetometer Data (CDF-format) |
| CH-OG-3-RSO+ ... | CHAMP Rapid Science Orbit, given in the CHAMP orbit format |
Format descriptions and
conventions:
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| CH-RINEX-EXT.html |
CH-OG-1-SST product (CHAMP rinex extensions) |
| CH-GFZ-FD-001.pdf |
CH-OG-2-ACC and CH-ME-2-ASC-BOOM product (CHAMP data format) |
| CH-GFZ-FD-002.pdf | CH-OG-3-RSO product (CHAMP orbit format) |
| CH-OVM-DATA-FORMAT.html | CH-ME-2-OVM product (CDF-format) |
| CH-FGM-DATA-FORMAT.html | CH-ME-2-FGM-SC product (CDF-format) |
| CH-GFZ-RS-002.PDF | CHAMP
reference system, Transformations and Standards (PDF-File)
get PDF-File Adobe Acrobat Reader |
Official COSPAR number for CHAMP
The official CHAMP COSPAR number has been fixed to 2000-039B (for
ILRS: 0003902) on November 22, 2000. On December 5, 2000 00:00:00 UTC the COSPAR number for CHAMP has been adopted in the CHAMP orbit prediction products generated at GFZ; December 5, 2000 00:00:00 UTC
CHAMP related International Meetings
Dec 6, 2000: Second European GNSS Surface Reflection Working
Group Meeting; held in Fresnel-1 meeting room at ESTEC, Noordwijk,
NL Contact: M.Martin-Neira
Dec 15, 2000: The New Generation of Gravity Mapping: Early Results
from CHAMP and Preparation for GRACE;
Special Session G01 at AGU Fall
Meeting 2000, San Francisco
New Date: Feb 6 - 9, 2001:
IGS Leo Pilot Project Meeting, held at GeoForschungsZentrum, Potsdam
March 2001: The new gravity missions (CHAMP, GRACE, GOCE);
Special Session G1 at EGS XXVI General Assembly, Nice, France
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