Lunar Baselines and Libration from Differential VLBI Observations of Alseps

Details Lunar Baselines and Libration from Differential VLBI Observations of Alseps Lunar Baselines and Libration from Differential VLBI Observations of Alseps

Oct 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973moon....8..484c&link_type=abstract

Lunar Dynamics and Observational Coordinate Systems, Proceedings of IAU Colloq. 24, held in Houston, TX, 15-17 January, 1973. M

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Scientific paper

Differential very-long-baseline interferometric observations of signals from Apollo Lunar Surface Experiment Package telemetry transmitters will yield the relative projected positions of the transmitters with uncertainty of only 1-3 m, set mainly by uncertainty of the lunar ephemeris. Noise and systematic instrumental errors which in the past affected similar observations have been reduced to the equivalent of a few centimeters on the lunar surface by the development of a new type of differential receiver. Continued observations should yield a determination of the motion of the Moon about its center of mass with uncertainty less than 1 s of selenocentric arc. Improvements (by other means) in our knowledge of the Moon's orbital motion would allow a further order-of-magnitude refinement in the libration and relative position results obtainable by differential VLBI.

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