L-band orthorectified, calibrated radar polarization images of secondary craters on the floor of the Peary crater. (a) HH (b) VV and (c) HV polarization images shown in dB scale with ranges shown at the bottom. The anomalous craters (shown with arrows and marked “1” and “2”) and the young, fresh crater analyzed in this work are indicated in the HH-pol image. Note the proximal ejecta region of the fresh crater that is clearly highlighted (approximate boundary indicated with yellow arrows) in the HV-pol image compared to the HH- and VV-pol images. Also apparent from these images is that the depolarized echoes (HV-pol in this case) are much more sensitive to small-scale surface roughness than to topographic slopes. The radar look direction is from the left. Note that the eastern part of the fresh crater rim at the bottom is distorted due to improper terrain correction.