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Results for “LUNAR ECHO”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1962

SURFACE ROUGHNESS OF THE MOON

Description of lunar surface from radar lunar echoes with definition of roughness based on statistical properties of a surface

RADAR CROSS SECTION↗
NASA NTRS1993

LLR: Activities in Wettzell

Following the idea of a fundamental station, the Wettzell Laser Ranging Station was designed to range to all types of satellites and to the moon. After obtaining the first lunar echos in October 1990, the system's operation was improved. A short report of lunar ranging activities is given.

Schreiber, Ulrich↗
NASA NTRS1974

Atlas of lunar radar maps at 70-cm wavelength

The intensity distribution of lunar radar echoes has been mapped for two-thirds of the earth-visible lunar surface at a wavelength of 70 cm. The depolarizing effects of the lunar surface were observed by simultaneously receiving the radar echoes in opposite polarizations. These echoes were mapped with areal resolutions of 25-100 sq km. Mapping with this resolution confirmed that the young craters have enhanced returns. A few craters were found to have enhanced echoes only from their rims. Backscattering differences were also observed between various areas within a mare, between different highland areas, and between maria and adjacent highlands. These scattering differences were interpreted with a simple model, which assumed that the surface backscattered with varying amounts of quasi-specular and diffuse power. Only an increase in the diffuse power was needed to give the numerical values of the enhancements.

Thompson, T. W.↗