IEICE Trans - Analysis of Topographic Effects on SIR-B Imagery: Correlation of Image Intensity with Local Incidence Angles

Analysis of Topographic Effects on SIR-B Imagery: Correlation of Image Intensity with Local Incidence Angles

Makoto SATAKE
Masaharu FUJITA
Nobuyoshi FUGONO

Publication
IEICE TRANSACTIONS on Communications Vol.E75-B No.11 pp.1220-1226
Publication Date: 1992/11/25
Online ISSN:
DOI:
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
Keyword:
SAR, topographic effect,

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Summary:
Dependence of SIR-B image intensity on local incidence angles has been investigated to estimate quantitatively topographic effects in SAR imagery. Local incidence angles were computed from a digital elevation model (DEM) produced from a topographical map. Slope images representing the variation of local incidence angles of a hilly area were compared with the SIR-B images. Since the studied area is uniformly covered by shrubs and grass, the topograghic effect can be easily detected. Based on the topographic effects, backscattering coefficients (σ⁰) of the hilly area were estimated and compared with the existing σ⁰ data base.