Pamir — Tienshan GPS Project: Network, Observation Campaign 92 and Analysis Strategy

The joint effort of geo-institutions from four states of the CIS and the GeoForschungsZentrum Potsdam has resulted in the design, monumentation and observation of a 40 points GPS network in one of the most complex zone of continental collision between the Eurasian and Indian plates. The network covers the states of Usbekistan, Kirgistan and part of Kasachstan and has an extension of about 1.000 × 500 km. One point in the network (Kitab) is belonging to the global GPS fiducial station network, running permanently a ROGUE receiver. Another point (Maidanak) was tied to the nearby 3rd generation SLR station. By two joint teams the monumentation of the network was carried out in May/June 1992 following CSTG/SGMS monumentation standards. The first observation campaign was run in August 1992 by 11 joint teams equipped with TRIMBLE 4000 SST receivers, automatic meteo stations, generators, etc. Four corner points of the network were occupied permanently, the rest of the network was observed by seven moving teams in 6 sessions. First data analysis results have been obtained by processing the Trimble data from the regional network simultaneously with the global IGS core network data. Investigations of daily global dynamic solutions proof a baseline repeatability of 1.10−8.