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S band transponder experimentIt is reported that this experiment measures the lunar gravitational field, which in turn provides information on the distribution of lunar mass and its correlation with surface features such as craters, mountains, and maria. The lunar gravitational field is measured by observing the dynamical motion of spacecraft in free-fall orbits. Effective detection of mass variations is greatly enhanced by low-altitude trajectories, such as the eccentric orbits during revolutions 3 to 16 of the Apollo 16 spacecraft and the 11 km periapsis of the Apollo 16 subsatellite during May 1972. The observational data are the precise earth-based radio tracking measurements initially used for real-time navigation.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Sjogren, W. L.
(JPL Houston, TX, United States)
Muller, P. M.
Wollenhaupt, W. R.
(NASA Lyndon B. Johnson Space Center)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Publication Information
Publication: Apollo 16 Prelim. Sci. Rept. te]
Subject Category
Electronic Equipment
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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