摘要
星载干涉雷达高度计采用脉冲压缩技术提高距离向分辨率,采用合成孔径技术提高方位向分辨率,采用干涉技术提高高程精度。针对星载雷达高度计下视角较小的问题,从干涉雷达原理入手,重点分析了干涉相位及干涉高程精度影响因素,推导了干涉相位及高程误差传递方程,最后通过仿真实验得到:下视角越小,海面高程精度受基线长度和倾角误差的影响也越小,反演得到的高程精度也越高。因此雷达高度计采用小下视角获取的海面高程精度更高,更有利于高精度海洋探测。
In the Space-borne interferometric radar altimeter system,the pulse compress technology is used to improve range resolution,the synthetic aperture technology is used to improve azimuth resolution,and the interference technology is used to improve the height resolution.Aiming at the small look angle of interferometric radar altimeter,this article introduces the principle of interferometric radar,analysis the influence factor of phase and height accuracy,and deduces the error transfer equation of phase and height.The simulation results show that:the smaller the look angle,the less influence between height accuracy and baseline(including length and dip angle),and the higher the height accuracy.Therefore,the small look angle of interferometric radar altimeter is beneficial to the higher height accuracy and marine survey.
作者
蒋帅
庞亚龙
汪路元
禹霁阳
程博文
李宗凌
Jiang Shuai;Pang Yalong;Wang Luyuan;Yu Jiyang;Cheng Bowen;Li Zongling(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《国外电子测量技术》
2019年第12期32-36,共5页
Foreign Electronic Measurement Technology
关键词
星载
干涉
雷达高度计
精度分析
space-borne
interferometric
radar altimeter
precision analysis
