Radar backscatter characteristics of a desert surface

被引:44
|
作者
Ridley, J
Strawbridge, F
Card, R
Phillips, H
机构
[1] BATH COLL HIGHER EDUC, REMOTE SENSING & GIS UNIT, BATH, AVON, ENGLAND
[2] UNIV NEW S WALES, SCH GEOMAT ENGN, KENSINGTON, NSW 2033, AUSTRALIA
基金
澳大利亚研究理事会;
关键词
D O I
10.1016/0034-4257(96)00018-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Satellite radar altimeter measurements have shown spn tial and temporal variations in the backscattered signal from desert surfaces. In order to understand these variations we have carried out extensive in situ measurements for the validation of a compilation of existing backscatter models. The model predictions are in excellent agreement with ground- and satellite-based measurements of the radar backscatter coefficient, and show that the altimeter backscatter measurements are strongly affected by variations in soil moisture following rainfall and by the presence of dew On the surface. Regional, but time-invariant, differences in backscatter are attributed to variations in surface topography.
引用
收藏
页码:63 / 78
页数:16
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