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Gravity model TUM-2sp based on the energy balance approach and kinematic CHAMP orbits


Földvary, L.; Švehla, Dražen; Gerlach, Ch.; Wermuth, M.; Gruber, Th.; Rummel, R.; Rothacher, M.; Frommknecht, B.; Peters, Th.; Steigenberger, P.
Gravity model TUM-2sp based on the energy balance approach and kinematic CHAMP orbits // Earth Observation with CHAMP - Results from Three Years in Orbit / Reigber, Ch. ; Lühr, H. ; Schwintzer, P. ; Wickert, J. (ur.).
Heidelberg, Germany: Springer Verlag, 2004. str. 13-18


Naslov
Gravity model TUM-2sp based on the energy balance approach and kinematic CHAMP orbits

Autori
Földvary, L. ; Švehla, Dražen ; Gerlach, Ch. ; Wermuth, M. ; Gruber, Th. ; Rummel, R. ; Rothacher, M. ; Frommknecht, B. ; Peters, Th. ; Steigenberger, P.

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Earth Observation with CHAMP - Results from Three Years in Orbit

Urednik/ci
Reigber, Ch. ; Lühr, H. ; Schwintzer, P. ; Wickert, J.

Izdavač
Springer Verlag

Grad
Heidelberg, Germany

Godina
2004

Raspon stranica
13-18

ISBN
3-540-22804-7

Ključne riječi
One year CHAMP data, gravity field, energy balance approach

Sažetak
We have used one year of CHAMP data for deriving a gravity field model based on he energy balance approach. In order to avoid the use of any a priori gravity field information, purely kinematic orbits have been computed from GPS measurements only. Subsequently velocities have been derived from these kinematic positions by two different methods, namely smoothing splines and Newton-Gregory interpolation. Using the principle of energy conservation, the satellite’ s positions and velocities are transformed into gravitational potential. CHAMP on-board micro-accelerometry is used to correct for surface forces. For spherical harmonic analysis the so-called direct approach has been implemented using the full normal equation matrix. The model, called TUM2Sp, was found to be a more accurate gravity field than EIGE-2 model.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija



POVEZANOST RADA


Projekt / tema
0007012