In cooperation with various partners in Europe, North America and in the host countries, GFZ Potsdam has established and repeatedly observed three major GPS networks: in South America the SAGA network, in Central Asia the CATS- and in South-East Asia the GEODYSSEA-network.This paper focusses on data processing and datum definition issues for these networks. In general GPS data for these networks were processed simultaneously with IGS network data to tie the fiducial-free network solutions with the ITRF. Approximately 20 globally distributed IGS stations were included when computing global solutions, a few IGS stations in or adjacent to the respective region, when computing regional solutions. Mean station position residuals between our global network solutions and ITRF97 coordinates are 1cm horizontally and 1–2 cm vertically. For the regional solutions the station position residuals range from 2–5 mm for the horizontal to 10 mm for the vertical component.Our GPS-derived results are interpreted in terms of regional tectonics and relative plate motions. For this the datum of the station velocities is defined in a regional reference frame. Datum definition results are presented for the CATS and SAGA networks.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Realization of a terrestrial reference frame for large-scale GPS networks
- Springer Berlin Heidelberg