干涉合成孔径雷达干涉参数定标技术研究进展

    Advances in Interferometric Parameter Calibration Techniques for Interferometric Synthetic Aperture Radar

    • 摘要: 干涉合成孔径雷达(InSAR)通过对雷达回波信号进行干涉处理可以获取高精度三维地表信息。InSAR系统测制精度依赖于干涉基线和干涉相位等干涉参数的精度,干涉参数定标技术通过雷达观测参考目标推算并校准干涉参数系统误差,能够有效提升干涉处理精度,是InSAR干涉处理技术的一个重要研究内容。文中对InSAR原理和干涉参数误差进行了分析,对目前干涉参数定标技术的发展进行了研究,梳理出基于干涉参数敏感度方程和基于干涉参数偏差方程的干涉参数定标方法并进行了重点介绍,总结了两种定标方法的优缺点及适用条件,最后展望了干涉参数定标技术未来的研究方向。

       

      Abstract: Interferometric synthetic aperture radar (InSAR) can obtain high-precision three-dimensional surface information by interferometric processing of radar echo signals. The measurement accuracy of InSAR system depends on the accuracy of interferometric parameters such as interferometric baseline and interferometric phase. Interferometric parameter calibration technology can effectively improve the accuracy of interferometric processing by calculating and calibrating the systematic errors of interferometric parameters through the observation of the reference target, which is an important research content of InSAR interferometric processing technology. In this paper, the principle of InSAR and the error of interferometric parameters are analyzed, the current development of interferometric parameter calibration technology is studied, and the calibration methods based on the sensitivity equation of interferometric parameters and the deviation equation of interferometric parameters are sorted out and introduced in detail. The advantages, disadvantages and applicable conditions of the two calibration methods are summarized. Finally, the future research direction of interference parameter calibration technology is prospected.

       

    /

    返回文章
    返回