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Research progress on geosynchronous synthetic aperture radar

Fundamental Research 2021年第3期1卷 346-363页

作者： Cheng Hu Zhiyang Chen Yuanhao Li Xichao Dong Stephen Hobbs The School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Advanced Technology Research Institute Beijing Institute of TechnologyJinan 250300China The Key Laboratory of Electronic and Information Technology in Satellite Navigation(Beijing Institute of Technology) Ministry of EducationBeijing 100081China Department of Geoscience and Remote Sensing Delft University of Technology2628 Delftthe Netherlands Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China The School of Aerospace Transport&Manufacturing Cranfield UniversityUK

Based on its ability to obtain two-dimensional(2D)high-resolution images in all-time and all-weather conditions,spaceborne synthetic aperture radar(SAR)has become an important remote sensing technique and the study of such systems has entered a period of vigorous *** imaging modes such as radar interferometry,tomography,and multi-static imaging,have been ***,current in-orbit spaceborne SARs,which all operate in low Earth orbits,have relatively long revisit times ranging from several days to dozens of days,restricting their temporal sampling *** SAR(GEO SAR)is an active research area because it provides significant new capability,especially its much-improved temporal *** paper reviews the research progress of GEO SAR technologies in *** typical orbit schemes are presented,followed by the corresponding key issues,including system design,echo focusing,main disturbance factors,repeat-track interferometry,etc,inherent to these *** analysis and solution research of the above key issues are *** SAR concepts involving multiple platforms are described,including the GEO SAR constellation,GEO-LEO/airborne/unmanned aerial vehicle bistatic SAR,and formation flying GEO SAR(FF-GEO SAR).Due to the high potential of FF-GEO SAR for three-dimensional(3D)deformation retrieval and coherence-based SAR tomography(TomoSAR),we have recently carried out some research related to FF-GEO *** research,which is also discussed in this paper,includes developing a formation design method and an improved TomoSAR processing *** is found that GEO SAR will continue to be an active topic in the aspect of data processing and multi-platform concept in the near future.

关键词： Geosynchronous synthetic aperture radar(GEO SAR) Orbit scheme Disturbance factors echo focusing Formation flying

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