[en] Improvements in geodetic tools are making previously subtle effects significant. Two examples affecting GPS observations are atmospheric loading of the Earth's crust and the tropospheric delays, specifically the wet component. Each measurement, tropospheric delays and site coordinates, requires unambiguous determination of the other to achieve the highest accuracy.
Table Mountain Geophysical Observatory (TMGO) is a unique site where a long history of observations from two complementary techniques, GPS and superconducting gravimetry, have been accrued. In particular, the superconducting gravity measurements provide a unique baseline for evaluating GPS vertical estimates over a variety of time frames. Positional estimates for TMGO using these techniques will be compared. Tropospheric effects will be identified and discussed. The ability for GPS to make subdaily, daily, and long term vertical estimates will be evaluated.
Disciplines :
Earth sciences & physical geography Physics
Identifiers :
UNILU:UL-ARTICLE-2008-962
Author, co-author :
Schenewerk, M.; NOAA, SSMC3, 1315 East-West Highway, Silver Spring, USA.
van Dam, Tonie ; NOAA, SSMC3, 1315 East-West Highway, Silver Spring, USA.
Sasagawa, G.; NOAA, CIRES/University of Colorado, Boulder, USA.
Philipsen, S.; Aerospace Department, University of Colorado, Boulder, USA
Larson, K.; Aerospace Department, University of Colorado, Boulder, USA
Language :
English
Title :
A detailed analysis of tropospheric effects on geodetic observations at TMGO