Signal enhancement for planetary radar sounders

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. Finally, some results for the Mars Advanced Radar for Subsurface and Ionosphere Sounding and for the Shallow Radar sounders are presented.