一种改进的机载SAR基线估计方法  

An improved baseline estimation method of airborne SAR

作　　者：木林[1] 张继贤[2] 黄国满[2] 赵争[2] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100830

出　　处：《测绘科学》2011年第6期121-123,97,共4页Science of Surveying and Mapping

基　　金：国家高技术研究发展计划("863"计划)(2009AA12Z145);国家重大测绘科技专项"机载多波段多极化干涉SAR测图系统"

摘　　要：本文利用地面控制点对机载双天线雷达系统的基线参数进行估计。首先证实了基线长度的精度与控制点斜距差的精度是同数量级的,然后运用最小二乘法解算控制点的斜距差,并通过干涉相位信息和解缠相位信息对斜距相位差进行精化处理,得到精度较高的斜距相位差参加基线的解算。通过实验表明,该方法获得的基线参数精度较高。In this paper, ground control points were used to estimate the baseline parameters of the two-antenna airborne radar system. First of all, it confirmed the accuracy of the baseline length and the slant range difference between the control points was the same level of accuracy, second the least square method was used to calculate slant range difference of the control points, and then phase difference of the slant range was refined through interferometric phase information and unwrapped phase information to obtain the slant range phase difference of higher precision to participate in the baseline estimates. The experiment demonstrated that the baseline parameters of higher precision could be obtained by the method finally.

关 键 词：角反射器 斜距相位差 干涉相位 解缠相位 

分 类 号：P236[天文地球—摄影测量与遥感]