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针对传统D-InSAR技术以栅格单元为研究对象而无法充分反映地形条件的问题,该文提出了以边坡单位为研究对象的D-InSAR数据特征分析。通过基于边坡单元的区域地形因子与后向散射系数和相干系数关系的分析方法,建立了研究区域SAR数据的可信区域滤波方法,提取出了研究区域SAR数据分析结果的可信区域。该方法提高了SAR数据的有效性,为滑坡早期监测提供了可靠的数据基础。通过对金沙江乌东德区域的SAR数据实例分析,验证了该方法的实用性。
Aiming at the problem that the traditional D-InSAR technology can not fully reflect the terrain condition by taking the grid cell as the research object, this paper proposes the feature analysis of D-InSAR data with the slope unit as the research object. Based on the analysis of the relationship between the topography factor and the backscattering coefficient and the coherence coefficient of slope units, a credible region filtering method is proposed to study the regional SAR data, and the credible region of the SAR data analysis results is extracted. This method improves the effectiveness of SAR data and provides a reliable data foundation for early landslide monitoring. By analyzing the SAR data in the Wudong area of the Jinsha River, the practicality of this method is verified.