HF SAR image cross-correlation technique for high accuracy orbit positioning  

作　　者：KOBAYASHI Takao LEE SeungRyeol KIM JungHo ONO Takayuki 

机构地区：[1]Planetary Science Group, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea [2]Shanghai Astronomical Observatory

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第5期978-985,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Basic Research Project, "Development of New Geological Technology for Tracing Earth and Planetary Evolution" of the Korea Institute of Geoscience and Mineral Resources (KIGAM)

摘　　要：A novel technique to determine the position of spacecraft orbits is proposed. The technique is based on the cross-correlation function of HF SAR images and is able to determine the relative position of orbits with an accuracy of - λ/4 or better, where 2 is the wavelength of the HF radar pulse at its center frequency. The performance of the proposed technique was confirmed by simulation which was carried out under the condition of design facts of the SELENE LRS mission. The highly accurate orbit positioning enables precise superposition of HF SAR images so that the inherent mirror image ambiguity problem of HF SAR imaging is resolved to obtain a quality SAR image of the HF band. In addition ambitious 2D-SAR processing would be possible when the above accuracy is available.A novel technique to determine the position of spacecraft orbits is proposed. The technique is based on the cross-correlation function of HF SAR images and is able to determine the relative position of orbits with an accuracy of ～ /4 or better, where is the wavelength of the HF radar pulse at its center frequency. The performance of the proposed technique was confirmed by simulation which was carried out under the condition of design facts of the SELENE LRS mission. The highly accurate orbit positioning enables precise superposition of HF SAR images so that the inherent mirror image ambiguity problem of HF SAR imaging is resolved to obtain a quality SAR image of the HF band. In addition ambitious 2D-SAR processing would be possible when the above accuracy is available.

关 键 词：high accuracy orbit determination SAR LRS SELENE 

分 类 号：P135[天文地球—天体力学]