Interferometric capability of domestic L-SAR satellite under different vegetation coverage

doi:10.13474/j.cnki.11-2246.2025.0224

Abstract

Abstract: Focusing on the problem of surface deformation detection ability of L-SAR data in densely vegetated mountainous areas,taking the junction of Zhejiang,Jiangxi and Anhui provinces as the study area,based on the L-SAR data and high-resolution multispectral data,and with the negative correlation between vegetation coverage and interference coherence as the a priori condition,the Pearson's correlation coefficient method is adopted to obtain the sample data for coherence estimation,and the sample data are analyzed and evaluated under different vegetation coverage by means of statistical analysis and fitting. Pearson's correlation coefficient method is used to obtain the sample data for coherence estimation,and then analyzes and evaluates the interferometric capability of L-SAR data under different vegetation cover by means of statistical analysis and fitting. The study shows that:① There is a strong Logistic regression between L-SAR interference coherence and vegetation cover,in which the interference coherence coefficient decreases the fastest when the vegetation cover is from 0.2 to 0.4.② The interference effect of L-SAR data is good and stable under low and medium-low vegetation cover; the interference effect is relatively good but less stable under medium vegetation cover; the interference effect is unsatisfactory in the region with high vegetation cover. In the area of high vegetation cover,the interference effect is unsatisfactory.

Key words: L-SAR, densely vegetated mountainous areas, vegetation cover, interferometric coherence

CLC Number:

P237

LI Xiaotian, ZHAN Yuanzeng, ZHOU Wei, ZHAO Jianxue, Lü Yanfei, SHI Litao, FENG Cunjun. Interferometric capability of domestic L-SAR satellite under different vegetation coverage[J]. Bulletin of Surveying and Mapping, 2025, 0(2): 132-136.

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