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基于精细DEM的InSAR大气相位改正试验研究

DOI: 10.6046/gtzyyg.2013.02.18, PP. 101-106

Keywords: 湿延迟,DEM,树坪滑坡,最优函数校正模型,形变场

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Abstract:

大气波动严重地制约了传统D-InSAR技术在缓变形滑坡体形变监测中的应用。为此,针对树坪滑坡区特殊的地理位置、复杂的地形地貌特征以及多雨潮湿的气候条件,通过分析湿延迟相位随高程变化的空间分布特征,分别建立了空间局部区域内大气效应与相应高程之间的最优函数校正模型,将模拟的湿延迟相位从解缠相位中去除,最终恢复出树坪滑坡体的形变场。试验结果表明,该方法显著地降低了干涉图中的湿延迟相位,清楚地框出了树坪滑坡体形变场在11d中的位置、大小及其分布情况,这对三峡库区缓变形滑坡体的全面监测具有重要意义。

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