Precision Geodesy via Radio Interferometry

Details Precision Geodesy via Radio Interferometry Precision Geodesy via Radio Interferometry

Oct 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972sci...178..396h&link_type=abstract

Science, Volume 178, Issue 4059, pp. 396-398

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14

Scientific paper

Very-long-baseline interferometry experiments, involving observations of extragalactic radio sources, were performed in 1969 to determine the vector separations between antenna sites in Massachusetts and West Virginia. The 845.130-kilometer baseline was estimated from two separate experiments. The results agreed with each other to within 2 meters in all three components and with a special geodetic survey to within 2 meters in length; the differences in baseline direction as determined by the survey and by interferometry corresponded to discrepancies of about 5 meters. The experiments also yielded positions for nine extragalactic radio sources, most to within 1 arc second, and allowed the hydrogen maser clocks at the two sites to be synchronized a posteriori with an uncertainty of only a few nanoseconds.

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