Image quality, statistical and textural properties of SAREX data from the Tapajos test site

摘要

The image quality of the SAREX data set from the Tapajos test site is examined in the light of the available CCRS calibration data. Noise removal and its effects on the statistical properties of the data is addressed. Mathematical modeling is used to predict HH/VV differences, incidence angle effects and general trends; these are compared to the SAREX date. Model results are close to observations up to near grazing angles of incidence. Observed large HH/VV differences seen at near grazing angles may be due to surface scattering from the top of the forest canopy allied with Brewster angle effects. Textural discrimination of surface cover types is investigated; preliminary results are presented.