雷达科学与技术2024，Vol.22Issue(4)：434-442,453,10.DOI:10.3969/j.issn.1672-2337.2024.04.010
基于椭球模型的斜视星载SAR距离模糊仿真
RASR of Nonzero Squint Spaceborne SAR Based on Ellipsoid Model
摘要
Abstract
Range ambiguity signal ratio(RASR)is an important performance index of spaceborne SAR images.Compared with the zero squint SAR,the geometric relationship between the satellite and the earth in high squint SAR imaging is more complex.The assumption that the earth is regarded as a sphere in traditional RASR calculation and simu-lation will cause a large deviation in the calculation results,which will inaccurately estimate the SAR image quality.In this paper,a more accurate ellipsoid model of the earth is used to replace the sphere model,and an ambiguity region cal-culation method based on the squint antenna coordinate system is proposed.By using this method,the change of RASR along the range swath is simulated,and the spatial variability of RASR along the azimuth is also studied.The research results of this paper provide important reference value for the design of spaceborne SAR system.关键词
大斜视星载SAR/距离模糊/椭球模型Key words
high squint spaceborne SAR/RASR/ellipsoid model of the earth分类
信息技术与安全科学引用本文复制引用
蔡佳睿,吕继宇..基于椭球模型的斜视星载SAR距离模糊仿真[J].雷达科学与技术,2024,22(4):434-442,453,10.基金项目
国家重点研发计划(No.2021YFC3000405) （No.2021YFC3000405）
