Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63.1295d&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 12, p. 1295-1304.
Physics
9
Scientific paper
The GeoForschungsZentrum (GFZ) has started together with three other research centers of the German Helmholtz Association the ``GPS Atmosphere Sounding'' Project (GASP) on using ground-based (Subproject 1) and space-based (Subproject 2) GPS observations for applications in the numerical weather predictions, climate research and space weather monitoring, which this paper focusses on. The Subproject 1 comprises all necessary components - data links and handling, path delay estimation, conversion to water vapor. The GPS and meteorological data are transmitted in hourly batches to the GFZ since December 1998 and processed with GFZ EPOS software. First experiences with near real-time analysis have been obtained and the operational precision determination of water vapor within local GPS networks has been demonstrated with an accuracy of better than 2mm with a standard deviation at the level of better than +/-1mm. Densification of the test network is progressing from 10 to 100 sites, requiring new analysis strategies.
Dick Galina
Gendt G.
Reigber Ch.
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