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| 一种机载干涉SAR区域网平面定位算法 | |
| 引用本文： | 毛永飞,向茂生,韦立登.一种机载干涉SAR区域网平面定位算法[J].电子与信息学报,2012,34(1):166-171. |
| 作者姓名： | 毛永飞 向茂生 韦立登 |
| 作者单位： | 1. 中国科学院电子学研究所微波成像技术国家重点实验室 北京100190;中国科学院研究生院 北京100039 2. 中国科学院电子学研究所微波成像技术国家重点实验室 北京100190 |
| 基金项目： | 国家863计划项目，国家973计划项目 |
| 摘 要： | 平面定位就是获取SAR图像中每个像素点的地理坐标。在平面定位时,需要对相关参数进行定标,以保证精度。该文从平面定位的几何关系出发,通过线性化平面位置误差,提出了基于敏感度方程的平面定标算法。在此算法基础上,又提出了多场景联合平面定标算法,该算法利用相邻场景之间的同名点信息,能够实现稀少控制点条件下的大区域平面定位。实测数据处理结果表明,在少量控制点情况下,该文算法的平面定位精度优于传统的多项式模型和距离多普勒模型。 |
| 关 键 词： | 干涉合成孔径雷达 平面定位 联合平面定标 敏感度方程 同名点 |
| 收稿时间： | 2011-03-30 |
A Block Positioning Method for Airborne InSAR System |
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| Mao Yong-fei , Xiang Mao-sheng , Wei Li-deng.A Block Positioning Method for Airborne InSAR System[J].Journal of Electronics & Information Technology,2012,34(1):166-171. | |
| Authors: | Mao Yong-fei Xiang Mao-sheng Wei Li-deng |
| Affiliation: | (National Key Laboratory of Science and Technology on Microwave Imaging, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) (Graduate University of Chinese Academy of Sciences, Beijing 100039, China) |
| Abstract: | Positioning method aims to get the geographical coordinates of each pixel in SAR images. It is necessary to calibrate the parameters of the positioning model to increase precision. This paper presents a method based on sensitivity equations to calibrate the positioning model by linearizing the position errors. Then a method of joint calibration of the positioning model over large areas including several scenes is proposed, and it can achieve the positioning of large areas with few Ground Control Points (GCPs) by using Corresponding Points (CPs) between adjoining scenes. The results show that with few GCPs the accuracy of this method is better than polynomial ortho-rectification model and range-Doppler model. |
| Keywords: | InSAR Positioning Joint calibration Sensitivity equations Corresponding points |
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