高相干点地基InSAR的大气延迟纠正

发布时间：2018-01-13 20:16

  本文关键词：高相干点地基InSAR的大气延迟纠正　出处：《测绘科学》2017年01期 　论文类型：期刊论文

  更多相关文章： 地基合成孔径雷达干涉测量 步进频率连续波 大气延迟相位 高相干点 最小二乘法

【摘要】：针对目前地基合成孔径雷达干涉测量技术中大气影响造成的相位延迟校正方法存在的校正精度低、方法复杂、技术要求高等不足,提出了一种基于高相干点的地基InSAR大气延迟相位函数模型校正方案。该方案不需多幅SAR影像,不需人工布点,节省了大量人力物力。以高相干点的相干值作为权阵参与计算,该方法可得到更精确的校正结果。运用该方法将地基雷达对山西省吕梁市林家坪工程滑坡获取的数据进行大气延迟改正的实验。结果表明:所提方案不仅处理方法简单,改正效果明显,而且能满足绝大多数类似工程的精度要求,更为经济实用。
[Abstract]:In view of the shortcomings of the current phase delay correction methods caused by atmospheric influence in the ground-based synthetic aperture radar interferometry technology, the correction accuracy is low, the method is complex, and the technical requirements are high. This paper presents a correction scheme for the delayed phase function model of ground-based InSAR atmosphere based on highly coherent points, which does not require multiple SAR images and does not require manual placement. It saves a lot of manpower and material resources and takes the coherent value of the high coherence point as the weight matrix to participate in the calculation. This method can obtain more accurate correction results. The experimental results of atmospheric delay correction by using the ground-based radar to the data obtained from the Linjiaping engineering landslide in Luliang City, Shanxi Province are shown as follows:. The proposed scheme is not only simple to deal with. The correction effect is obvious, and it can meet the precision requirement of most similar projects, which is more economical and practical.
【作者单位】： 中国地质大学(北京)土地科学技术学院;
【基金】：基金委青年科学基金项目(41304012);基金委国家重大科研仪器设备研制专项(自由申请项目)(61427802);基金委重点项目(41330634);基金委面上项目(41374016) 2014年大学生创新性实验计划项目(201411415040)
【分类号】：TN958
【正文快照】： 0引言近年来,地基雷达凭借其携带方便、操作灵活、精度高、分辨率高等优越性,已后来居上地成为国外进行形变监测的重要手段。在我国,地基雷达的研究工作也进入了起步阶段。地基合成孔径雷达干涉测量(ground—based synthetic aper-ture radar interferometry,GB-InSAR)是近十，

本文编号：1420368