Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1893h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, Oct. 1991, p. 1893-1896. Research supported by Kerr-McGee Foundation.
Physics
19
Earth Rotation, Global Positioning System, Position Errors, Very Long Base Interferometry, Axes Of Rotation, Diurnal Variations, Laser Range Finders, Poles, Root-Mean-Square Errors
Scientific paper
The determination of pole-position variations from the analysis of 23 days of Global Positioning System (GPS) data continuously collected with a globally distributed, 21-station network is discussed. The comparison of the estimated pole positions from these data with results from 11 very long baseline interferometry (VLBI) experiments conducted during this same interval yields weighted root-mean-square differences about the mean differences of 0.5 mas for both X- and Y-pole position estimates from an analysis using single-day arcs, and 1.0 and 0.8 mas from an analysis using three weekly multiday arcs. These results are of sufficient quality that GPS could provide an alternative technique to VLBI and satellite laser ranging for regular monitoring of high-time-resolution variations in the position of the earth's rotation axis.
Dong Danan
Herring Thomas A.
King Robert W.
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