The experiment which derives data from three lunar-orbiting objects, the command-service module (CSM), the lunar module (LM), and the subsatellite in the S-band is described. Each provides detailed information on the near-side lunar gravitational field. The primary emphasis is on the low-altitude (20 km) CSM data. The LM data cover a very short time span and are somewhat redundant with the CSM data. The resolution of the high-altitude (100 km) CSM data is not as great as that of the low altitude data. The low-altitude CSM and LM data coverage and the complementary coverage obtained during the Apollo 14 mission are presented. The experiment uses the same technique of gravity determination employed on the Lunar Orbiter, in the data of which the large anomalies called mascons were first observed. The data consist of variations in the spacecraft speed as measured by the Earth-based radio tracking system.


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    Title :

    S-band transponder experiment


    Contributors:


    Publication date :

    1972-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    S band transponder experiment

    Sjogren, W. L. / Muller, P. M. / Wollenhaupt, W. R. | NTRS | 1972


    S-band transponder experiment

    Gottlieb, P. / Muller, P. M. / Sjogren, W. L. et al. | NTRS | 1971


    S-band transponder experiment

    Sjogren, W. L. / Wollenhaupt, W. R. / Wimberly, R. N. | NTRS | 1973


    Retrodirective transponder feasibility experiment

    Annese, J. F. / Hicks, G. R., Jr. / Klein, L. et al. | NTRS | 1967


    Apollo 15 gravity analysis from the S-band transponder experiment.

    Sjogren, W. L. / Muller, P. M. / Wollenhaupt, W. R. | NTRS | 1972