中国科学院大学学报2024，Vol.41Issue(1)：88-96,9.DOI:10.7523/j.ucas.2022.053
一种改进的基于干涉相位周期的无人机差分干涉合成孔径雷达基线估计方法
An improved UAV-borne DInSAR baseline estimation method based on interferometric phase period
摘要
Abstract
UAV(unmanned aerial vehicle)-borne differential interferometric synthetic aperture radar(SAR)has unique advantage and has attracted the attention of key research institutions at home and abroad in recent years.Baseline is a crucial parameter in differential in DInSAR processing,which is directly related to the accuracy of interferometric measurements.Compared with space-borne InSAR,UAV platform is difficult to keep the flight at the same track,and the flight attitude are unstable,which brings great difficulties to the baseline estimation of UAV-borne DInSAR.In this paper,starts from the characteristics of UAV platform and application scenarios,an improved baseline estimation method is proposed.This method derives the relationship between the interference phase period,the slant range,the distance between two ground points,and the phase difference through the interference geometric relationship.The distance between the two points is then substituted into the known parameters for baseline estimation using the least squares method.Comparing the simulation results and the actual data results of the original method and the improved method,it shows that the accuracy and robustness of the baseline estimation results of the improved method are significantly improved.关键词
无人机/差分干涉/基线估计/微型SARKey words
UAV/DInSAR/baseline estimation/mini-SAR分类
信息技术与安全科学引用本文复制引用
张桐,乔明,党相卫,钟声依柳..一种改进的基于干涉相位周期的无人机差分干涉合成孔径雷达基线估计方法[J].中国科学院大学学报,2024,41(1):88-96,9.基金项目
国家自然科学基金(41874059)资助 （41874059）
