where h is the mean height of surface variations, λ is wavelength, and θ is the incidence angle. Lau compared the
performance in earthquake damage assessment of three different SAR imagery sources: ALOS PALSAR L-band,
RADARSAT-1 C-band and the TerraSAR-X X-band data [1].Battsengel et al. have used multi-frequency radar images for
the classification of different urban land surface features [2].