| 海洋遥感星载双基地雷达LHCP天线摆放策略 |
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| 作者姓名： | 张晓坤 袁洪 王宇 |
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| 作者单位： | 中国科学院光电研究院, 北京 100190 |
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| 摘 要： | 针对全球定位系统(GPS)和地球低轨(LEO)飞行器组成星载双基地雷达进行海洋遥感探测问题,分析了不同轨道高度下镜面反射点的分布情况和不同GPS仰角下反射耀斑区的特征;据此进一步研究了LEO星载接收机的单根高增益左旋圆极化(LHCP)天线的摆放策略,并对中国未来进行双基地海洋遥感探测实验的可能卫星平台做了具体分析,给出了一种天线波束和指向的最佳组合. 对于中国双基地雷达LHCP天线实验设计有参考价值.
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| 关 键 词： | 双基地雷达 LHCP天线摆放 镜面反射点 耀斑区 |
| 收稿时间： | 2008-03-20 |
| 修稿时间： | 2008-07-15 |
LHCP antenna orientation strategy of bistatic radar for oceanographic remote sensing |
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| Authors: | ZHANG Xiao-Kun YUAN Hong WANG Yu |
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| Institution: | Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | This paper investigates LHCP (left-hand circularly-polarized) antenna orientation strategy for bistatic radar, configured of GPS (Global Positioning System) and receiver on-board LEO (Low Earth Orbit) spacecraft, for oceanographic remote sensing. The relationship between the distribution of specular points and LEO height is analyzed. The influences of the GPS elevations on the shape of iso-delay ellipses, iso-doppler hyperbola and other characteristics of glistening zone are also discussed. A high gain LHCP antenna orientation strategy is proposed, considering these factors as follows: the interest sea area location, LHCP antenna beam area, the orbit characteristic of LEO satellite and the GPS elevation distribution at specular points. According to the orbit of our possible LEO satellite in the potential bistatic radar, we present an optimal combination of LHCP antenna beam solid angle and pointing orientation. The simulation of this strategy indicates good results in oceanographic remote sensing. It can be an important reference for LHCP antenna design of the future bisatic radar. |
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| Keywords: | bistatic radar LHCP antenna orientation specular point glistening zone |
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