| 利用二星TDOA和FDOA测量及辅助高度信息对地面目标的定位算法及精度分析 |
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| 引用本文： | 林雪原,何友,史佩.利用二星TDOA和FDOA测量及辅助高度信息对地面目标的定位算法及精度分析[J].空间科学学报,2006,26(4):277-281. |
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| 作者姓名： | 林雪原 何友 史佩 |
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| 作者单位： | 1. 海军航空工程学院信息融合技术研究所,烟台,264001
2. 海军航空工程学院训练部 |
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| 基金项目： | 全国优秀博士论文作者专项基金(2000036)
高校骨干教师资助项目(3240)共同资助 |
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| 摘 要： | 卫星探测定位系统对地面辐射源目标定位时,一般利用TDOA(到达时间差)测量,而当辐射源与卫星之间存在相对运动时,也可以测量FDOA(到达频率差)．当辐射源的高程已知时,可以利用WGS-84地球椭圆模型作为精确定位模型．据此提出了利用两颗低轨卫星的TDOA及FDOA测量对地面辐射源定位算法,并对定位的算法进行深入的研究,同时推导了定位误差的分布模型．
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| 关 键 词： | TDOA FDOA 二星定位 辅助高度信息 误差分析 |
| 文章编号： | 0254-6124/2006/26（4）-277-05 |
| 收稿时间： | 2005-07-04 |
| 修稿时间： | 2006-04-25 |
Location Algorithm and Error Analysis for Earth Object Using TDOA, FDOA by Dual-Satellite and Aided Height Information |
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| LIN Xueyuan,HE You,SHI Pei.Location Algorithm and Error Analysis for Earth Object Using TDOA, FDOA by Dual-Satellite and Aided Height Information[J].Chinese Journal of Space Science,2006,26(4):277-281. |
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| Authors: | LIN Xueyuan HE You SHI Pei |
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| Institution: | Research Institute of Information Fusion, Naval Aeronautical Engineering Institute, Yantai 264001; 2 Department of Training, Naval Aeronautical Engineering Institute |
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| Abstract: | Determining the position of an object on Earth's surface has many applications, such as in navigation and in remote sensing. The location system generally consists of a number of spatially well separated receivers that capture the radiated or reflected signal from the object. The satellite positioning systems has the advantage of long-distance and wide coverage compared with ground positioning systems and airplane positioning systems. When satellite positioning systems locates an object on earth's surface, TDOA (Time Difference Of Arrival) measurements, but when there are relative motions between object and satellite, the FDOA (Frequency Difference Of Arrival) can also be measured. When the altitude from sea-level of object is known, WGS-84 ellipsoid earth model can be used as the precise location model. This paper puts forwards the location algorithm for emitter on Earth using the TDOA and FDOA measurements of two low-orbit satellite, and studies in detail this algorithm, at the same time provides the error distributions model of location accuracy. |
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| Keywords: | TDOA FDOA Dual-Satellite location Aided height information Error analysis |
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