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| Titel |
CHAMP gravity field recovery using the energy balance approach |
| VerfasserIn |
Ch. Gerlach, N. Sneeuw, P. Visser, D. Švehla |
| 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.73-80 |
| Datensatznummer |
250000038
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| Publikation (Nr.) |
 copernicus.org/adgeo-1-73-2003.pdf |
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| Zusammenfassung |
Since the early days of satellite geodesy energy
balance based methods for gravity field determination have
been considered. If non-conservative forces are known the
Hamiltonian along the orbit is a constant of the motion. Thus
the gravity field can be determined if position and velocity
of the satellite are known and accelerometer measurements
are available to model the non-conservative part. CHAMP
is the first satellite that provides the user with those three
kinds of data nearly continuously. Numerical investigations
using real CHAMP data are presented to show the feasibility
of the method. Using a semi-analytical approach the gravity
field can be determined efficiently by a 2D-Fourier method.
Those fast computations also give way to application of the
method not only to a full gravity field recovery but also, e.g.
for quick-look and validation of SST observations for satellite
missions like CHAMP, GRACE or GOCE. The method
can also be used for estimation of accelerometer calibration
parameters.
Key words. gravity field, energy balance, Jacobi-integral,
non-conservative forces, accelerometer calibration, CHAMP |
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