Other
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979m%26p....20..179t&link_type=abstract
(International Astronomical Union and COSPAR, Julius Schmidt Symposium on 100 Years of Lunar Mapping, Lagonissi, Greece, May 25-
Other
3
Astronomical Observatories, Lunar Maps, Planetary Mapping, Radar Maps, Selenography, Doppler Radar, Lunar Landing Sites, Lunar Photography, Lunar Surface, Polarization Characteristics, Radar Echoes
Scientific paper
Lunar radar mappings carried out in the late 1960s and 1970s have provided several valuable insights into lunar surface processes. These radar mappings used the delay-Doppler technique and needed the narrow antenna beams now available with large radio telescopes. Two-element radar interferometers have provided resolution of the delay-Doppler ambiguity at meter wavelengths and provided topographic information at centimeter wavelengths. These techniques have provided high resolution lunar radar maps at 3.8-cm, 70-cm, and 7.5-m wavelengths, a set of wavelengths which span the window available for earth-based radar mapping of the moon. These radar maps have been used along with other earth-based and Apollo orbital measurements to define surface units. The radar maps and these other data can describe physical properties such as small-scale blockiness and surface chemistry.
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