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Effective expansion of satellite laser ranging network to improve global geodetic parameters

Toshimichi Otsubo ; Koji Matsuo ; Yuichi Aoyama ; Keiko Yamamoto ; Thomas Hobiger (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium ; Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik) ; Toshihiro Kubo-oka ; Mamoru Sekido
Earth Planets and Space (1343-8832). Vol. 68 (2016),
[Artikel, refereegranskad vetenskaplig]

The aim of this study is to find an effective way to expand the ground tracking network of satellite laser ranging on the assumption that a new station is added to the existing network. Realistic numbers of observations for a new station are numerically simulated, based on the actual data acquisition statistics of the existing stations. The estimated errors are compared between the cases with and without a new station after the covariance matrices are created from a simulation run that contains six-satellite-combined orbit determination. While a station placed in the southern hemisphere is found to be useful in general, it is revealed that the most effective place differs according to the geodetic parameter. The X and Y components of the geocenter and the sectoral terms of the Earth’s gravity field are largely improved by a station in the polar regions. A middle latitude station best contributes to the tesseral gravity terms, and, to a lesser extent, a low latitude station best performs for the Z component of the geocenter and the zonal gravity terms.

Nyckelord: Space geodesy, Satellite laser ranging, Geodetic satellites, Terrestrial reference frame, Earth gravity field, Global geodetic observing system

Denna post skapades 2016-04-26. Senast ändrad 2016-12-12.
CPL Pubid: 235214


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