雙基前視SAR幾何定位及同步誤差分析

梅海文; 孟自強; 李亞超; 邢孟道

doi:10.11999/JEIT170677

雙基前視SAR幾何定位及同步誤差分析

doi: 10.11999/JEIT170677 cstr: 32379.14.JEIT170677

1.
(西安電子科技大學(xué)雷達(dá)信號處理國家重點實驗室西安 710071)
2.
(中國航空工業(yè)集團(tuán)公司雷華電子技術(shù)研究所無錫 214063)

基金項目:

國家自然科學(xué)基金(61001211, 61303035, 61471283)

計量
- 文章訪問數(shù): 1513
- HTML全文瀏覽量: 192
- PDF下載量: 168
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2017-07-07
- 修回日期: 2017-12-05
- 刊出日期: 2018-04-19

Bistatic Forward-looking SAR Geometrical Positioning and Analysis of Synchronization Error

1.
(National Laboratory of Radar Signal Processing, Xidian University, Xi&rsquo
2.
(Leihua Electronic Technology Institute, Aviation Industry Corporation of China, Wuxi 214063, China)

Funds:

The National Natural Science Foundation of China (61001211, 61303035, 61471283)

摘要

摘要: 針對目標(biāo)區(qū)域不存在圖像匹配基準(zhǔn)點如對海面目標(biāo)、草原目標(biāo)等定位時，基于圖像匹配的目標(biāo)定位方法失效問題，該文提出基于R-D原理的雙基前視SAR幾何定位方法。首先，在相鄰合成孔徑中心時刻，利用收發(fā)平臺與目標(biāo)的幾何關(guān)系進(jìn)行數(shù)學(xué)建模；再結(jié)合地距SAR圖像中的目標(biāo)與場景中心點的關(guān)系，解算目標(biāo)相對接收平臺的位置信息；最終，根據(jù)雙基地前視SAR系統(tǒng)的特點，建立空時頻同步誤差模型，并結(jié)合仿真計算結(jié)果給出其對定位精度的影響規(guī)律。仿真結(jié)果驗證了定位方法的有效性及誤差模型的正確性。
- 合成孔徑雷達(dá) /
- 雙基前視 /
- 無參考點定位 /
- 定位精度
Abstract: A geometrical location method based on the R-D principle is proposed. In the case of the location method based on image matching target method will be invalid, when the target area does not have the matching point, such as: sea target, grassland target, etc. First, a geometrical model between the transceiver platform and the target is constructed at the time of center of adjacent synthetic aperture. Then the position information of the target relative of the receiving platform can be solved by combining the relationship between the target in the SAR image and the center point of scene. Finally, according to the characteristic of bistatic forward-looking SAR system, the error models of synchronization errors are built. What is more, through the analysis of the simulation results, the influence of the error on the positioning accuracy is given. Simulation results show the validity of the positioning method and the proposed error models.
- SAR /
- Bistatic forward-looking /
- Absolute positioning /
- Geolocation accuracy

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參考文獻(xiàn)(23)

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