COMMENTS ON STATISTICAL AND SPATIAL PROPERTIES OF FOREST CLUTTER MEASURED WITH POLARIMETRIC SYNTHETIC-APERTURE RADAR

Sheen and Johnston have derived a theoretical expression for the inten sity autocorrelation function of a synthetic aperture radar (SAR) imag e based on the product model for SAR clutter, see also the 1986 work b y Ulaby et al. This derivation is valid under the assumption that the instrument function width is narrow relative to the width of the textu re autocorrelation function. This communication draws attention to a m ore general derivation of the intensity autocorrelation function, give n by Oliver, which does not require this assumption.