Space-borne sensors can provide valuable spatial image data, which play an irreplaceable role in ground target observation. In this paper, we have derived a parameter called the scattering efficiency per unit area (SEA), which is used to describe the ability of different media to change the energy of an incident field in the far zone. Over the range of Hyperion wavelengths, the SEA are unequal, which can be used as the characteristic signal for target classification. In order to increase the acc