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| Titel |
Kinematic and reduced-dynamic precise orbit determination of low earth orbiters |
| VerfasserIn |
D. Švehla, M. Rothacher |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: G1. The new gravity field mission (CHAMP, GRACE, GOCE): from measurements to geophysical interpretation ; Nr. 1 (2003-06-17), S.47-56 |
| Datensatznummer |
250000035
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| Publikation (Nr.) |
 copernicus.org/adgeo-1-47-2003.pdf |
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| Zusammenfassung |
Various methods for kinematic and reduced-dynamic
precise orbit determination (POD) of Low Earth Orbiters
(LEO) were developed based on zero- and double-differencing
of GPS carrier-phase measurements with and without
ambiguity resolution. In this paper we present the following
approaches in LEO precise orbit determination:
– zero-difference kinematic POD,
– zero-difference dynamic POD,
– double-difference kinematic POD with and without ambiguity
resolution,
– double-difference dynamic POD with and without ambiguity
resolution,
– combined GPS/SLR reduced-dynamic POD.
All developed POD approaches except the combination of
GPS/SLR were tested using real CHAMP data (May 20-30,
2001) and independently validated with Satellite Laser Ranging
(SLR) data over the same 11 days.
With SLR measurements, additional combinations are
possible and in that case one can speak of combined kinematic
or combined reduced-dynamic POD. First results of
such a combined GPS/SLR POD will be presented, too.
This paper shows what LEO orbit accuracy may be
achieved with GPS using different strategies including zerodifference
and double-difference approaches. Kinematic versus
dynamic orbit determination is presently an interesting
issue that will also be discussed in this article.
Key words. POD, kinematic orbit, dynamic orbit, LEO,
CHAMP, ambiguity resolution, GPS, SLR |
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