Downward continuation of Mars SHARAD data

Abstract

Shallow Subsurface Radar (SHARAD) data from the Mars Reconnaissance Orbiter are acquired approximately 300 kilometers above the Martian polar icecap. In this report we detail how to adapt seismic 3D poststack downward continuation to allow construction of the data that would have been recorded a short distance above the Martian surface, thereby saving significant computational time and storage in subsequent imaging and analysis of the shallow polar subsurface.