项目名称: 基于时空信息的InSAR数据质量控制与后处理研究
项目编号: No.41274004
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 张菊清
作者单位: 长安大学
项目金额: 70万元
中文摘要: 面对多卫星、大重复量的SAR数据,急需解决InSAR成果的质量控制与评价问题。本项目旨在充分利用不同波段SAR数据特点,结合多期形变监测信息,研究误差控制的方法。考虑到InSAR监测成果中不可避免地存有异常值和系统误差,为了削弱其影响,研究基于时空一体的异常误差识别与特征点提取,构建合理的附加参数模型及自适应动态系统误差补偿算法,以提高精度,达到数据质量控制的目的。在此基础上,进一步分析误差特点,找出各误差源的影响规律,并从理论估计、内部精度评价和外部检核三方面相结合对InSAR监测成果进行合理评价。最后,结合地表形变在时间域空间域连续变化的特点,研究缺失数据拟合、冗余数据压缩和监测成果可视化表达等后处理方法。通过本项目的研究,可望建立合理优化的InSAR数据质量控制与评价方法,研究一套实用高效的后处理算法,为改善InSAR数据处理质量,提高地球物理反演精度提供理论参考。
中文关键词: InSAR;失相干;后处理;时空模型;数据融合
英文摘要: In the processing of the multi-satellite and a large number of SAR data, it is urgent to solve the problem of quality controlling and evaluation. In this project, the method for error controlling will be studied based on the characteristics of SAR satellite images of different bands and deformation monitoring information of multi- periods. Considering abnormal and systematic error exist inevitably in the InSAR deformation monitoring datum, identification of outliers and correction of systematic error must be done in order to ensure the reliability of monitoring datum. So we will identify the outliers and extract the feature points from InSAR deformation monitoring data based on the idea of spatio-temporal and construct a reasonable model with additional parameter and a compensation algorithm for adaptive dynamic system error. After analyzing the error characteristics and seeking the impact regular pattern, we will evaluate the quality of InSAR monitoring results from the combination of theoretical estimation, internal precision assessing and external checking. Furthermore, we will study the method of missing data fitting, redundant data compression and result visualization combined the feature that the deformation monitoring data changes continuously in space and time domain. A reasonable and optimize method for
英文关键词: InSAR;decorrelation;post-processing;spatial-temporal;data fusion