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 ...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.展开更多
At 0:04 Beijing time on December 29,2015,a LM-3B launch vehicle lifted off from the Xichang Satellite Launch Center,putting the GF-4 satellite into its orbit successfully.The GF-4 satellite,developed by the China Acad...At 0:04 Beijing time on December 29,2015,a LM-3B launch vehicle lifted off from the Xichang Satellite Launch Center,putting the GF-4 satellite into its orbit successfully.The GF-4 satellite,developed by the China Academy of Space Technology,is a geosynchronous orbit optical imaging satellite with a resolution of 50m and lifetime of 8 years.It is the first geostationary Earth observation satellite with the展开更多
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)
文摘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.
文摘At 0:04 Beijing time on December 29,2015,a LM-3B launch vehicle lifted off from the Xichang Satellite Launch Center,putting the GF-4 satellite into its orbit successfully.The GF-4 satellite,developed by the China Academy of Space Technology,is a geosynchronous orbit optical imaging satellite with a resolution of 50m and lifetime of 8 years.It is the first geostationary Earth observation satellite with the
