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多孔径InSAR技术电离层校正方法及二维形变场应用研究——以玉树地震为例

, PP. 457-468

Keywords: 差分合成孔径雷达干涉测量,多孔径InSAR,L波段,电离层误差,二维形变,玉树地震

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Abstract:

?差分合成孔径雷达干涉测量技术只能监测地表在雷达视线方向上的一维形变,这极大的限制了其发展和应用.本文详细介绍了一种利用单对干涉影像监测地表二维形变的方法——多孔径InSAR(MAI)技术,研究了基线误差和电离层对该技术的影响,发展了利用顾及方向性的滤波和插值方法改正电离层的影响.最后,以2010年玉树地震为研究对象,利用两景PALSAR影像给出了地表的同震二维形变场.研究结果表明,MAI技术要明显优于传统的灰度偏移量法,在同震形变监测和震源参数反演中具有巨大的潜力.

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