I agree, the SHARAD work was amazing to use mixed mode Radar to image the subsurface ice tomographically (by reconstructing synthetic aperture radar from multip

I agree, the SHARAD work was amazing to use mixed mode Radar to image the subsurface ice tomographically (by reconstructing synthetic aperture radar from multiple passes of 2? different radar frequencies from many orbits with limited antenna time). This is really the first time frozen water (not just frost) has been SEEN with an imaging spectrometer!