机载SAR惯性导航误差快速估计方法

doi:10.3969/j.issn.1009-086x.2018.01.014

现代防御技术 ›› 2018, Vol. 46 ›› Issue (1): 88-93.DOI: 10.3969/j.issn.1009-086x.2018.01.014

机载SAR惯性导航误差快速估计方法

王冠勇^1,2, 王风飞², 张磊², 胡庆荣¹

1.北京无线电测量研究所,北京 100854;
2.西安电子科技大学雷达信号处理国家重点实验室,陕西西安 710071

收稿日期:2017-05-31 修回日期:2017-07-25 出版日期:2018-02-28 发布日期:2020-11-25
作者简介:王冠勇(1989-),男,天津人。博士生,主要从事合成孔径雷达成像技术研究。通信地址:100854 北京市142信箱203分箱 E-mail:guanbingwang@126.com
基金资助:
国家自然科学基金(61301280,61301293)

Fast Inertial Navigation Error Estimation Method for Airborne SAR

WANG Guan-yong^1,2, WANG Feng-fei², ZHANG Lei², HU Qing-rong¹

1. Beijing Institute of Radio Measurement,Beijing 100854,China;
2. Xidian University,National Key Lab of Radar Signal Processing,Shaanxi Xi'an 710071,China

Received:2017-05-31 Revised:2017-07-25 Online:2018-02-28 Published:2020-11-25

摘要/Abstract

摘要： 为了实现机载SAR图像高精度定位,提出了一种利用子图像BP成像的惯导误差快速估计方法。详细推导了惯导位置和速度误差与BP成像模型定位误差的关系,通过线性近似得到定位误差观测方程,利用最小二乘法得到惯导位置和速度误差的估计。在相同均值和方差的高斯观测噪声下进行蒙特卡罗实验,结果表明该方法与传统距离-多普勒模型估计方法相比具有更小的估计均方误差。

关键词: 合成孔径雷达, 惯导误差, 快速估计, 后向投影, 最小二乘法, 距离-多普勒模型

Abstract: To locate airborne synthetic aperture radar (SAR) image with high accuracy, a fast inertial navigation error estimation method is proposed by using advantage of sub image back projection (BP) imaging. The relationship between inertial navigation error in position, velocity and positioning error under BP imaging model is investigated. The observation equation of positioning error is obtained by approximating the relationship in linear. Estimations of inertial navigation error in position and velocity can be obtained by least square method. Monte Carlo tests are processed under Gauss observation errors with the same mean and variance. It is illustrated that the proposed method possesses a lesser error of mean square compared with the conventional range-Doppler (R-D) model based estimation method.

Key words: synthetic aperture radar(SAR), inertial navigation error, fast estimation, back projection(BP), least square method, range-Doppler(R-D) model

中图分类号:

王冠勇, 王风飞, 张磊, 胡庆荣. 机载SAR惯性导航误差快速估计方法[J]. 现代防御技术, 2018, 46(1): 88-93.

WANG Guan-yong, WANG Feng-fei, ZHANG Lei, HU Qing-rong. Fast Inertial Navigation Error Estimation Method for Airborne SAR[J]. Modern Defense Technology, 2018, 46(1): 88-93.

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机载SAR惯性导航误差快速估计方法

Fast Inertial Navigation Error Estimation Method for Airborne SAR

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