HR: 0800h
AN: G31C-0799    [Abstracts]
TI: Estimation of time-varying geopotential coefficients using Satellite Laser Ranging data
AU: * Luceri, V
EM: cinzia.luceri@asi.it
AF: Telespazio S.p.A. , Centro di Geodesia Spaziale, C.da terlecchia, Matera, 75100 Italy
AU: Sala, R
EM: riccardo\_sala@telespazio.it
AF: Telespazio S.p.A. , Centro di Geodesia Spaziale, C.da terlecchia, Matera, 75100 Italy
AU: Sciarretta, C
EM: cecilia.sciarretta@asi.it
AF: Telespazio S.p.A. , Centro di Geodesia Spaziale, C.da terlecchia, Matera, 75100 Italy
AU: Bianco, G
EM: giuseppe.bianco@asi.it
AF: Agenzia Spaziale Italiana, Centro di Geodesia Spaziale, C.da Terlecchia, Matera, 75100 Italy
AB: Due to the long record of accurate and continuous laser ranging observations, Satellite Laser Ranging (SLR) is known as the only current space technique capable to monitor the long time variability of the Earth's gravity field. Geodetic satellites have been providing the low frequency part of the geopotential models used for precise orbit determination purposes (e.g. JGM3, EGM96,...). Nevertheless they can be used to estimate the temporal variation of selected coefficients, helping to clarify the complex interrelations in the earth-ocean-atmosphere system. In this work we present our analysis of SLR data (spanning two decades) from several geodetic satellites (including Lageos I-II, Stella, Starlette, Ajisai) to recover fortnightly estimates of low degree geopotential coefficients; the results are obtained analysing the satellites in proper combination.
DE: 1214 Geopotential theory and determination
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting