NDLI: The cosine model for correction of the terrain influences in SAR backscatter

Content Provider	IEEE Xplore Digital Library
Author	Junzhan Wang Yansong Bao Jianjun Qu
Copyright Year	2011
Description	Author affiliation: Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou 730000, China (Junzhan Wang) \|\| Key Laboratory of Meteoroglogical Disaser of Ministry of Education, Nanjing University of Information Science and Technology, 210044, China (Yansong Bao) \|\| Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China (Jianjun Qu)
Abstract	Synthetic Aperture Radar (SAR) imagery data has been one of the most important data sources for Earth's observation. However, terrain undulations affect the radiometric quality of SAR images. The correction of the indispensable when quantitative image analysis is performed with respect to the derivation of geo-and biophysical parameters. In this paper, a simple cosine model was proposed for the correction of terrain influences in SAR backscatter. Effects of the cosine value of three different look incidence angles on SAR backscatter were simulated based on the Advanced Integral Equation Model (AIEM), the results show that there is a good linear relationship between the SAR backscatter coefficient and the cosine value of the local incidence angle, then the semi-empirical cosine model for the correction of terrain influences was presented, the results show that the semi-empirical model was useful for the correction of the terrain influences in SAR backscatter based on the simulated data. The semi-empirical model also validated by the Advanced Synthetic Aperture Radar (ASAR) data and digital elevation model (DEM), the study area is part of Beijing mountain area. The results show that the semi-empirical model will offer help to the application of SAR data.
Starting Page	4593
Ending Page	4596
File Size	600653
Page Count	4
File Format	PDF
ISBN	9781424491728
e-ISBN	9781424491711
DOI	10.1109/RSETE.2011.5965338
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-24
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Backscattering coefficient Terrain correction Radiometry Data models Mathematical model ASAR Remote sensing Synthetic aperture radar AIEM Cosine model Backscatter
Content Type	Text
Resource Type	Article

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