TOPOGRAPHIC DEPENDENCE OF SYNTHETIC-APERTURE RADAR IMAGERY

被引：14

作者：

FRANKLIN, SE

LAVIGNE, MB

HUNT, ER

WILSON, BA

PEDDLE, DR

MCDERMID, GJ

GILES, PT

机构：

[1] NAT RESOURCES CANADA,CANADA FOREST SERV,MARITIMES FOREST RES CTR,FREDERICTON,NB E3B 5P7,CANADA

[2] UNIV MONTANA,SCH FORESTRY,MISSOULA,MT 59612

[3] UNIV WATERLOO,DEPT GEOG,EARTH OBSERVAT LAB,WATERLOO,ON N2L 3G1,CANADA

来源：

COMPUTERS & GEOSCIENCES | 1995年 / 21卷 / 04期

关键词：

REMOTE SENSING; MAPPING; TOPOGRAPHIC EFFECT; INCIDENCE VALUES; SAR; DTM; DEM;

D O I：

10.1016/0098-3004(94)00095-C

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The increasing availability of synthetic aperture radar (SAR) remote-sensing imagery for earth-science applications creates the need for reliable computer methods to improve the relationships between SAR observations and the Earth's abiotic, biotic, and cultural resources. In this paper, the topographic effect on aerial and satellite SAR imagery is quantified and corrected using software modified from an earlier normalized-cosine package written for use with optical/infrared remote-sensing imagery. The basic idea is that the incidence angle and forest canopy interactions with the radar beam can be estimated using a digital elevation model (DEM) and near-coincident observations in the red and near-infrared portions of the spectrum. Four different study areas in Canada and three different types of SAR imagery are used to illustrate the topographic dependence; and the degree of accuracy that;can be expected, following the application of these relatively simple radiometric corrections.

引用

页码：521 / 532

页数：12

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