NASA Technical Reports Server (NTRS) : Determination pdf

NASA Technical Reports Server (NTRS) : Determination

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A series of experiments was conducted during the last decade to explore the capability of very long baseline interferometry (VLBI) to measure the crustal and rotational motions of the Earth with accuracies at the centimeter level. The observing stations are those of NASA’s Deep Space Network in California, Spain and Australia. A multiparameter fit to the observed values of delay and delay rate yields radio source positions, polar motion, universal time, the precession constant, baseline vectors, and solid Earth tides. Source positions are obtained with formal errors of the order of 0”.01. UT1-UTC and polar motion are determined at 49 epochs, with formal error estimates for the more recent data of 0.5 msec for UT1-UTC and 2 to 6 mas for polar motion. Intercontinental baseline lengths are determined with formal errors of 5 to 10 cm. The Love numbers and Earth tide phase lag agree with the commonly accepted values

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 11/15/1982
• Year: 1982
• Book Topics/Themes: NASA Technical Reports Server (NTRS), DEEP SPACE NETWORK, EARTH CRUST, EARTH ORIENTATION, EARTH ROTATION, VERY LONG BASE INTERFEROMETRY, EARTH TIDES, LOVE WAVES, POLAR WANDERING (GEOLOGY), RADIO SOURCES (ASTRONOMY), UNIVERSAL TIME, Sovers, O. J., Fanselow, J. L., Purcell, G. H., Jr., Rogstad, D. H., Thomas, J. B

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