regions, incident microwaves are absorbed by melt water inside the snow pack, and backscattering
of the SAR signal from the wet snow region is lowest during summer [5]. It is higher in the winter
because melt water refreezes, forming ice pipes and lenses that operate as strong scatterers, that is,
produce high scattering as signals penetration and interact with them [1]. Frozen percolation zones
produce high backscattering all year round but often give low backscattering due to exposure to high
temperature. In Figure 11.3, at the head of glacier very high scattering is seen due to the percolation
zone. In unlike polarization, where a lowest value > −14 dB approx. is seen at lo
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