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New High-Resolution 70-cm Wavelength Radar Images of the Moon

Introduction: Radar maps of the lunar nearside at 70-cm wavelength currently have a spatial resolution of 3-5 km, and have been used to identify differences in regolith physical and chemical properties [e.g., 1-3]. Data at such long wavelengths are of particular interest due to their penetration depth of 5-10 m in even lossy lunar materials. Using the Arecibo Observatory 430 MHz radar system, we are collecting new images of the lunar surface with spatial resolution of ~300 m. These data will be used to study age and chemistryrelated differences among the mare deposits, regional differences in scattering properties in the highlands, and areas of possible permanent shadow at the lunar poles.