Subdaily Earth rotation during the Epoch ‘92 campaign

Autor:	R. Ibanez-Meier, Thomas A. Herring, Jean O. Dickey, Adam P. Freedman, S. M. Lichten
Rok vydání:	1994
Předmět:	business.industry Epoch (reference date) Atmospheric tide Geodetic datum Rotation Geodesy Geophysics Atmosphere of Earth Very-long-baseline interferometry Global Positioning System General Earth and Planetary Sciences business Geology Earth's rotation
Zdroj:	Geophysical Research Letters. 21:769-772
ISSN:	0094-8276
Popis:	Global Positioning System (GPS) data were used to estimate Earth rotation variations over an 11-day period during the Epoch '92 campaign in the summer of 1992. Earth orientation was measured simultaneously by several very long baseline interferometry (VLBI) networks. GPS and VLBI estimates of UT1 with 3-hour time resolution were then compared and analyzed. The high frequency behavior of both data sets is similar, although drifts between the two series of approximately 0.1 ms over 2-5 days are evident. The geodetic results were also compared with models for UT1 fluctuations at tidal periods and with estimates of atmospheric angular momentum made at 6-hour intervals. Most of the geodetic signal in the diurnal and semidiurnal frequency bands can be attributed to tidal processes, whereas UT1 variations over a few days are mostly atmospheric in origin.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f1576eda7324b1af501bcef49e852b6c https://doi.org/10.1029/94gl00420 Zobrazit plný text záznamu Plný text