HR: 1330h
AN: G32A-0730    [PDF]
TI: Gravity models from CHAMP and other satellite data
AU: * Lemoine, F G
EM: Frank.G.Lemoine@nasa.gov
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: * Lemoine, F G
EM: Frank.G.Lemoine@nasa.gov
AF: Raytheon ITSS, 1616 McCormick Drive, Upper Marlboro, MD 20774
AU: Cox, C M
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Cox, C M
AF: Raytheon ITSS, 1616 McCormick Drive, Upper Marlboro, MD 20774
AU: Zelensky, N P
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Zelensky, N P
AF: Raytheon ITSS, 1616 McCormick Drive, Upper Marlboro, MD 20774
AU: Luthcke, S B
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Thompson, B F
AF: Dept. of Aerospace Engineering Sciences, CB 431, University of Colorado, Boulder, Boulder, CO 80309-0431 United States
AU: Rowlands, D D
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Chinn, D S
AF: Laboratory for Terrestrial Physics, Code 926, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Chinn, D S
AF: Raytheon ITSS, 1616 McCormick Drive, Upper Marlboro, MD 20774
AU: Nerem, R S
AF: Dept. of Aerospace Engineering Sciences, CB 431, University of Colorado, Boulder, Boulder, CO 80309-0431 United States
AB: CHAMP spacecraft is the first of a series of new spacecraft missions that are revolutionizing our ability to model the Earth's geopotential. We report on the analysis of over 100 days of CHAMP data in 2001 and 2002, merged with tracking data of other satellites such as Jason, Topex, GFO, Starlette, Stella, Spot-2, as well as satellite altimetry. We find that the CHAMP-only component of these solutions is a significant improvement over pre-CHAMP satellite only models with respect to the high degree information expressed by the geopotential model coefficients. For example, the variance of the differences with altimeter-derived anomalies through degree 70 is 2.80 mGal$^2$ for the CHAMP-only solution based on 87 days of data vs. 10.19 mGal$^2$ for EGM96S. Nonetheless, in order to model properly the various resonances to which different satellites are sensitive, we must include other satellite data. We compare the performance of these new CHAMP derived solutions with EGM96 and the EIGEN series of solutions. We review carefully the performance of these models for altimetric satellites.
DE: 1214 Geopotential theory and determination
DE: 1227 Planetary geodesy and gravity (5420, 5714, 6019)
DE: 1241 Satellite orbits
DE: 1243 Space geodetic surveys
SC: Geodesy [G]
MN: 2003 Fall Meeting