Comparison from SAR to RaySAR

Comparison from SAR to RaySAR
Top left (a) SAR image of the Lunar Reconnaissance Orbiter;
top right (d) variant of cave model B simulated with RaySAR;
 
Credit:

The images were taken from the publication "Radar evidence of an accessible cave conduit on the Moon below the Mare Tranquillitatis pit" by Leonardo Carrer et al.(Nature Astromomy)