Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.g32a0723g&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #G32A-0723
Physics
1214 Geopotential Theory And Determination, 1227 Planetary Geodesy And Gravity (5420, 5714, 6019)
Scientific paper
Conventional modeling techniques often make use of a one day integration period (arc) in order to recover as much of the gravity field signal as possible. This one day arc length has served as a reasonable compromise between the ability to resolve the long period orbit perturbations from the gravity field and the growth of various modeling errors due to the extended integration time. The nature of the observables from the GRACE mission, however, may make it more effective to use a shorter arc length (i.e., less than one day). The data gathered by the GRACE mission differs from classical methods by relying principally on the high precision measurement of the short-period, differential perturbations of the two GRACE satellites. As a result, a shorter arc length should still be able to resolve the long wavelength components of the gravity field effectively without suffering from the longer period modeling errors associated with the longer arc lengths. Using data from the GRACE mission, this study will present results from a series of experiments designed to test the influence of both short and long arc lengths on the estimation of the gravity field.
Gunter B.
Kang Zhaofeng
Ries John
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