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| Titel |
Analysis of one month of CHAMP state vector and accelerometer data for the recovery of the gravity potential |
| VerfasserIn |
E. Howe, L. Stenseng, C. C. Tscherning |
| 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.1-4 |
| Datensatznummer |
250000028
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| Publikation (Nr.) |
 copernicus.org/adgeo-1-1-2003.pdf |
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| Zusammenfassung |
The energy conservation method is based on
knowledge of the state vector and measurements of nonconservative
forces. This is or will be provided by CHAMP,
GRACE and GOCE. Here the analysis of one month of
CHAMP state vector and accelerometer data is described.
The energy conservation method is used to estimate the
gravity potential at satellite altitude. When doing so we consider
the tidal potential from the sun and the moon, the explicit
time variation of the gravity potential in inertial space
and loss of energy due to external forces.
Fast Spherical Collocation have been used to estimate a
gravity field model to degree and order 90, UCPH2002 04.
This gravity field model is compared to EGM96 and EIGEN-2. The largest differences with respect to EGM96 are
found at those places where the gravity data used to determine
EGM96 had the largest uncertainty. EIGEN-2 and
UCPH2002 04 are similar, though there are some differences
in Antarctica and Central Asia. |
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