Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29t..28l&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 20, pp. 28-1, CiteID 1967, DOI 10.1029/2002GL015883
Physics
1
Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339), Geodesy And Gravity: Terrestrial Reference Systems, Geodesy And Gravity: General Or Miscellaneous
Scientific paper
The presence of degree-1 deformations in very long baseline interferometry (VLBI) measurements is detected for the first time. We compare VLBI measurements with the deformation field predicted using a GPS-determined load moment. Degree-1 series in the center of figure frame have root mean square values up to 3 and 1.5 mm in the up and horizontal components respectively. The predicted baseline series are compared with VLBI baseline series where there are >50 matching points. For the period 1996-2001, 14 baselines out of 35 are significantly correlated (5% significance level). For the period 1985-2001, a sinusoidal fit to the GPS load-moment series predicts baseline series at all VLBI epochs, 49 out of 110 baselines are significantly correlated (5% significance level). Comparison between annual signals estimated from the VLBI and predicted baseline series shows that degree-1 deformation most likely dominates the annual phase of the VLBI series.
Blewitt Geoffrey
Lavallée David
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