Ricerc@Sapienza

Herein we present a super resolution and electromagnetic interference suppression technique based on Maximum Entropy Method and applied to data acquired by the SHAllow RADar (SHARAD) on board the NASA's 2005 Mars Reconnaissance Orbiter (MRO) mission, currently operating on Mars. We show that the proposed algorithm allows to enhance signal-to-noise ratio by several decibels and the range resolution over a factor of three. Subsurface imaging is improved remarkably, allowing additional insights for the scientific community in the interpretation of the SHARAD radar data.

Orbital radar sounders are a useful tool to investigate planetary bodies. The sounding signal lies in the high frequency or very high frequency band, allowing a good ground penetration but limiting the system's resolution. Moreover, electromagnetic interference (EMI) may affect the system, increasing the noise in the radar products. In this Letter, a method to enhance the resolution and to suppress the EMI is presented. The method's performance and the parameters setting are investigated.