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Volume 57 Supplement 4

Special Issue: Special Section for the 2004 off the Kii peninsula earthquakes (2)

A simulation study of effects of GRACE orbit decay on the gravity field recovery

Abstract

The effects of satellite ground track changes of GRACE on monthly gravity field recoveries are investigated. In the case of a gravity field recovery using a relatively short period of a month or so, the variation of ground tracks affects the precision of the gravity field solutions. It is a serious problem when the solutions are employed for detecting temporal gravity changes which are almost at their detection limits. In this study, the recoveries of four-weekly gravity fields are simulated and the relation between the recovery precision and the ground track is investigated. The result shows that the GRACE ground track of the year 2003 was in good condition for four-week gravity field recovery, but it will sometimes appear as worse cases as the orbit altitude decays. In those cases, the global standard deviations of geoid height errors will be about one order worse than the best case. From our simulation, ground tracks of around altitudes of 473, 448, 399, 350 and 337 km give insufficient spatial resolutions, even for gravity field recovery up to degree 30.

References

  • Bettadpur, S., Level-2 Gravity Field Product User Handbook, GRACE 327–734, CSR, 2003.

    Google Scholar 

  • Case, K., G. Kruizinga, and S. C. Wu, GRACE Level 1B Data Product User Handbook, JPL D-22027, NASA, 2004.

    Google Scholar 

  • Center for Space Research, GGM01 Notes, http://www.csr.utexas.edu/grace/, 2003.

    Google Scholar 

  • Center for Space Research, GRACE Level 2 products, http://podaac.jpl.nasa.gov/grace/, 2004.

    Google Scholar 

  • Goddard Space Flight Center, GRACE Gravity Recovery and Climate Experiment, NP-2002-2-427-GSFC, NASA, 2002.

    Google Scholar 

  • Han, S. C., C. Jekeli, and C. K. Shum, Time-variable aliasing effects of ocean tides, atmosphere, and continental water mass on monthly mean GRACE gravity field, J. Geophys. Res., 109, B04403, 2004.

    Google Scholar 

  • Hoots, F. R. and R. L. Roehrich, Spacetrack Report No. 3 — Models for Propagation of NORAD Element Sets, 10 pp., Aerospace Defence Center, Peterson AFB, 1980.

    Google Scholar 

  • Klokočník, J., J. Kostelecký, and R. H. Gooding, On fine orbit selection for particular geodetic and oceanographic missions involving passage through resonances, J. Geod., 77, 30–40, 2003.

    Article  Google Scholar 

  • National Research Council, SATELLITE GRAVITY AND THE GEOSPHERE —Contributions to the study of the Solid Earth and Its Fluid Envelope, National Academy Press, Washington, D.C., 1997.

    Google Scholar 

  • Rapp, R. H. and C. Jekeli, Accuracy of the Determination of Mean Anomalies and Mean Geoid Undulations from a Satellite Gravity Field Mapping Mission, Rep. 307, Dept. of Geod. Sci. and Surv., Ohio State Univ., Columbus, 1981.

    Google Scholar 

  • Reigber, C., H. Lühr, and P. Schwintzer, CHAMP mission status, Adv. Space Res., 30, 129–134, 2002.

    Article  Google Scholar 

  • Sneeuw, N., C. Gerlach, L. Földváry, T. Gruber, T. Peters, R. Rummel, and D. Švehla, One year of time-variable CHAMP-only gravity field models using kinematic orbits, in A Window on the Future of Geodesy, IAG Symposium 128, edited by F. Sanso, 288 pp., Springer, 2003.

    Google Scholar 

  • Tapley, B. D., S. Bettadpur, M. Watkins, and C. Reigber, The Gravity Recovery and Climate Experiment: Mission overview and early results, Geophys. Res. Lett., 31, L09607, 2004.

    Article  Google Scholar 

Download references

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Correspondence to Keiko Yamamoto.

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Yamamoto, K., Otsubo, T., Kubo-oka, T. et al. A simulation study of effects of GRACE orbit decay on the gravity field recovery. Earth Planet Sp 57, 291–295 (2005). https://doi.org/10.1186/BF03352565

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  • DOI: https://doi.org/10.1186/BF03352565

Key words

  • Satellite gravity mission
  • GRACE
  • gravity field
  • satellite orbit