力学与实践 ›› 2016, Vol. 38 ›› Issue (1): 22-26.DOI: 10.6052/1000-0879-15-329

• 应用研究 • 上一篇    下一篇

圆迹合成孔径雷达星载实现的可行性分析

崔海英, 张祥坤, 姜景山   

  1. 中国科学院微波遥感技术重点实验室, 北京 100190
  • 收稿日期:2015-12-03 出版日期:2016-01-15 发布日期:2016-02-25
  • 通讯作者: 崔海英,副研究员,博士,从事卫星轨道动力学研究.E-mail:cuihy@mirslab.cn;张祥坤,研究员,博士,从事SAR相关技术研究.E-mail:xkzhang@mirslab.cn

FEASIBILITY ANALYSIS FOR SPACE-BORNE IMPLEMENTATION OF CIRCULAR SYNTHETIC APERTURE RADAR

Cui Haiying, Zhang Xiangkun, Jiang Jingshan   

  1. Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2015-12-03 Online:2016-01-15 Published:2016-02-25

摘要:

圆迹合成孔径雷达(circular synthetic apertureradar,CSAR)是一种通过传感器平台作360°圆周运动来获得全方位高空间分辨率的聚束合成孔径雷达,本文通过对其星载平台进行动力学分析来研究其星载的可行性.首先以CSAR的工作条件作为约束,建立了星载平台轨道模型.然后以圆迹中心为基点,分析了星载平台的运动状态及受力情况,最终得到形成圆迹平台所需要的主动控制力.研究结果表明:形成圆迹的星载平台,作用在卫星平台上的主动控制力大小、方向是不断改变的,使得CSAR对任意纬度区域的观测很难实现.但对于两极点区域,当星载平台沿圆迹以一定的角速度运行时,主动控制力的大小、方向不变,易于实现控制,有星载实现的可能性.

关键词:

圆迹合成孔径雷达|轨道动力学|星载实现|基点法

Abstract:

The Circular Synthetic Aperture Radar (CSAR) is a special spotlight SAR (synthetic aperture radar) with an all-directional high spatial resolution. The feasibility of its space-borne implementation by a space-borne platform is analyzed based on a dynamical method. A trajectory model with the constraint of CSAR's operating conditions is built. And an active control force on the space-borne platform to keep its trajectory is determined by analyzing the motion and the load of the platform by a basing-point method. Results show that for any latitude area, the magnitude and the direction of the force needed vary too frequently to be actualized. For the north and south pole areas, to keep the platform moving along a circular trajectory with a certain angular velocity, the magnitude and the direction of the active control force needed vary slightly and are easy to be actualized.

Key words:

circular synthetic aperture radar|orbit dynamics|space-borne implementation|basing-point method

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