摘要
慢速平台因其平台速度慢,采用脉冲推扫模式,可解决同时高分辨率、宽观测带SAR成像时对脉冲重复频率(PRF)要求的矛盾。针对慢速平台的特点,深入研究了慢速平台SAR系统的设计,为最大程度发挥侦察效能,设置脉冲推扫、方位向摆扫等工作模式,并采用二维有源相控阵天线的宽带宽角电扫功能予以实现。以脉冲推扫模式为例,对慢速平台SAR系统参数进行了仿真。结果表明,在10km平台高度和10m/s平台速度条件下,采用脉冲推扫模式,在0.3m分辨率时可实现优于30km的观测带宽,而在1m分辨率时可实现优于60km的观测带宽。
Conflict among pulse repeat frequency（PRF）, high resolution, and wide swath can be re- solved by using pulse push-broom imaging mode based on slow platform. We study the system design of syn- thetic aperture radar（SAR） according to the characteristic of slow platform. In order to exert operational ca- pability to the full, we present several imaging modes including pulse push-broom, azimuth whiskbroom, etc. These modes can be implemented by use of broad-band and wide-angle electronic scanning capability based on two-dimensional active phased array antenna. Simulation analysis of slow platform SAR system is carried out in the case of pulse push-broom imaging mode. The results indicate that swath is more than 30 kilometers for 0.3 meter resolution and swath is more than 60 kilometers for 1 meter resolution, when flight altitude is 10 kilometers and flight velocity is 10 meters per second.
出处
《雷达科学与技术》
北大核心
2015年第4期361-366,共6页
Radar Science and Technology
关键词
慢速平台
脉冲推扫
高分辨率
宽观测带
slow platform
pulse push-broom
high resolution
wide swath
