摘要
基于多频子脉冲(MFSP)的中轨(MEO)高分宽幅(HRWS)合成孔径雷达(SAR)系统设计过程中面临着全球覆盖、下视可见性、距离方位二维解模糊、系统复杂度优化等一系列问题,提出了从轨道到架构再到参数的3层设计思想,利用空间、时间、频率等多个维度进行二维模糊抑制与系统优化,采用典型低轨(LEO)SAR系统作为参照系统,完成了MEO星载HRWS SAR的系统设计,在中轨平台上实现了HRWS SAR成像,且较大地提高了星载平台对地观测的时间分辨率,最后通过仿真验证了设计方法的有效性,具有一定的工程应用价值。
In the process of designing the medium Earth orbit(MEO)spaceborne high resolution and wide swath(HRWS)synthetic aperture radar(SAR)(MEO-HRWS-SAR)system based on multiple frequency sub-pulses(MFSPs),there are a series of problems such as global coverage,low visibility,two-dimensional(2D)defuzzification along the distance azimuth,and system complexity optimization.In this paper,a three-layer design idea,i.e.,orbit,architecture,and then parameters,is proposed.The two-dimensional fuzzy suppression and system optimization are carried out with space,time,frequency,etc.The typical low Earth orbit(LEO)SAR system is used as the reference system to complete the design of MEO-HRWS-SAR system,and the HRWS SAR imaging is realized on the MEO platform.In addition,the temporal resolution of Earth observation on the spaceborne platform is greatly improved.Finally,the validity of the design method is verified by simulation.The proposed design method has certain engineering application value.
作者
沈义龙
汤楚蘅
陆晴
张双喜
SHEN Yilong;TANG Chuheng;LU Qing;ZHANG Shuangxi(School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710129,Shaanxi,China;Luoyang Electronic Equipment Test Center of China,Luoyang 471003,Henan,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2024年第4期67-75,共9页
Aerospace Shanghai（Chinese&English）
基金
上海航天科技创新基金(SAST2021-042、SAST2022-045)
国家自然科学基金(62271406)。
关键词
轨道设计
架构设计
参数设计
下视可见性
二维解模糊
全球覆盖
orbit design
architecture design
parametric design
downward-looking visibility
two-dimensional(2D)defuzzification
global coverage
