HR: 1330h
AN: G22B-0310    [PDF]
TI: Realisation of the TRF Origin by Different Satellite Techniques
AU: * Meisel, B
EM: meisel@dgfi.badw.de
AF: Deutsches Geodaetisches Forschungsinstitut, Marstallplatz 8, Muenchen, 80539 Germany
AU: Angermann, D
EM: angermann@dgfi.badw.de
AF: Deutsches Geodaetisches Forschungsinstitut, Marstallplatz 8, Muenchen, 80539 Germany
AU: Drewes, H
EM: drewes@dgfi.badw.de
AF: Deutsches Geodaetisches Forschungsinstitut, Marstallplatz 8, Muenchen, 80539 Germany
AU: Gerstl, M
EM: gerstl@dgfi.badw.de
AF: Deutsches Geodaetisches Forschungsinstitut, Marstallplatz 8, Muenchen, 80539 Germany
AU: Mueller, H
EM: mueller@dgfi.badw.de
AF: Deutsches Geodaetisches Forschungsinstitut, Marstallplatz 8, Muenchen, 80539 Germany
AB: The origin of the International Terrestrial Reference System (ITRS) is defined as the center of mass of the Earth, including solid earth, hydrosphere and atmosphere. In order to realize the origin for a TRF it is essential to analyse the contribution of the different space techniques (SLR, DORIS, GPS). This is important to detect systematic differences caused by deficiencies in the modelling of parameters that are correlated with the origin (e.g. orbit errors). Incorrect realisations of the origin cause common errors in the station coordinates of the entire network. Reversely common variations of the station coordinates may be transformed into changes of the origin. The goal of this paper is to analyse those effects. We use weekly network solutions of the different techniques. We processed a SLR solution at DGFI over eleven years using LAGEOS 1 and 2 data and applyied the latest models. GPS solutions were obtained from IGS and weekly DORIS solutions from the joint IGN/JPL analyis center. We investigate common signals in the coordinate time series that can be interpreted either as station position variations or origin variations. We compare these time series of the different techniques regarding offsets, periodic or non-linear effects. We analyse the strengths and weaknesses of the techniques to realise the origin parameters and the effect of the network distribution. Finally we discuss the impact of these results for a TRF combination from weekly network solutions.
DE: 1229 Reference systems
DE: 1247 Terrestrial reference systems
SC: Geodesy [G]
MN: 2003 Fall Meeting