Journal cover Journal topic
Advances in Geosciences An open-access journal for refereed proceedings and special publications
Journal topic

Journal metrics

Journal metrics

  • CiteScore value: 1.68 CiteScore
    1.68
  • SNIP value: 0.913 SNIP 0.913
  • SJR value: 0.651 SJR 0.651
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 34 Scimago H
    index 34
  • h5-index value: 13 h5-index 13
Volume 1
Adv. Geosci., 1, 73–80, 2003
https://doi.org/10.5194/adgeo-1-73-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Adv. Geosci., 1, 73–80, 2003
https://doi.org/10.5194/adgeo-1-73-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  17 Jun 2003

17 Jun 2003

CHAMP gravity field recovery using the energy balance approach

Ch. Gerlach1, N. Sneeuw2, P. Visser3, and D. Švehla1 Ch. Gerlach et al.
  • 1Institut für Astronomische und Physikalische Geodäsie, Technische Universität München, Germany
  • 2Department of Geomatics Engineering, University of Calgary, Canada
  • 3Delft Institute for Earth Oriented Space Research, Delft University of Technology, The Netherlands

Abstract. 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

Download
Citation