Abstract
Satellite laser ranging (SLR) observations of geodetic satellites (Degnan, 1993) have long been used to study the temporal variations of the Earth’s external potential through the long-period orbital perturbations they produce (Yoder et al., 1983; Rubincam, 1984; Cheng et al., 1989; Tapley et al., 1993; Gegout and Cazenave, 1993; Nerem et al., 1993; Chao and Eanes, 1995; Nerem and Klosko, 1995.) Secular and long period variations in the zonal Stokes coefficients and nearly diurnal and semidiurnal tidal variations in the order 1 and 2 coefficients can be monitored with this approach. In this paper we analyze SLR observations of Lageos-1 and Starlette and present new results for constraints on the secular and 18.6-year variations in the zonal harmonics. These results provide important information for improving geophysical models of glacial rebound, ice-sheet changes, and mantle anelasticity.
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Eanes, R.J., Bettadpur, S.V. (1996). Temporal Variability of Earth’s Gravitational Field from Satellite Laser Ranging. In: Rapp, R.H., Cazenave, A.A., Nerem, R.S. (eds) Global Gravity Field and Its Temporal Variations. International Association of Geodesy Symposia, vol 116. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61140-7_4
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DOI: https://doi.org/10.1007/978-3-642-61140-7_4
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