Semi-physical Simulation of the Airborne InSAR based on Rigorous Geometric Model and Real Navigation Data

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Changyong, Dou^1,2 ; Huadong, Guo^1 ; Chunming, Han^1 ; Yuquan, Liu^1 ; Xijuan, Yue^1 ; Yinghui, Zhao^1

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, No. 9 Dengzhuang South Road, Haidian, Beijing 100094, China^1

University of Chinese Academy of Sciences, Beijing, China^2

关键词: Application parameters;    Digital elevation model;    Inertial Measurement Unit (IMU);    InSAR data processing;    Position and orientation system(POS);    Processing algorithms;    Raw signal simulation;    Semi-physical simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012200/pdf
DOI  :  10.1088/1755-1315/17/1/012200

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Raw signal simulation is a useful tool for the system design, mission planning, processing algorithm testing, and inversion algorithm design of Synthetic Aperture Radar (SAR). Due to the wide and high frequent variation of aircraft's trajectory and attitude, and the low accuracy of the Position and Orientation System (POS)'s recording data, it's difficult to quantitatively study the sensitivity of the key parameters, i.e., the baseline length and inclination, absolute phase and the orientation of the antennas etc., of the airborne Interferometric SAR (InSAR) system, resulting in challenges for its applications. Furthermore, the imprecise estimation of the installation offset between the Global Positioning System (GPS), Inertial Measurement Unit (IMU) and the InSAR antennas compounds the issue. An airborne interferometric SAR (InSAR) simulation based on the rigorous geometric model and real navigation data is proposed in this paper, providing a way for quantitatively studying the key parameters and for evaluating the effect from the parameters on the applications of airborne InSAR, as photogrammetric mapping, high-resolution Digital Elevation Model (DEM) generation, and surface deformation by Differential InSAR technology, etc. The simulation can also provide reference for the optimal design of the InSAR system and the improvement of InSAR data processing technologies such as motion compensation, imaging, image co-registration, and application parameter retrieval, etc.