Estimation of the Positions of the First Order Control Points from Global Analysis of Ajisai and LAGEOS SLR Data

Abstract

The positions of 13 first order control points occupied by the HTLRS were estimated from global analysis of Ajisai and LAGEOS SLR data by using the University of Texas orbit analysis system, UTOPIA. The multi-arc strategy was applied in the analysis to reduce orbit error. The station coordinates except for the HTLRS were fixed to the SSC (CSR) 94 L 01 r 02. Comparison between Ajisai and LAGEOS SLR results suggests that accuracy of estimated station coordinates of the HTLRS in a global geocentric terrestrial reference frame be about 34cm. The accuracy of the baseline length between the HTLRS and Simosato is about 2cm. The results can be utilized for other geodetic studies, such as GPS local campaign or geoidal height estimation. Key words : SLR, Ajisai, LAGEOS, first order control points, UTOPIA.