基于修正轨道参数的多项式SAR图像几何校正方法  

A polynomial geometric rectification method for SAR images based on modified obit parameters

作　　者：李国庆 李亚柯[2] LI Guo-qing;LI Ya-ke(Fujian Agriculture and Forestry University,Faculty of Mechatronic Engineering,Fuzhou 350000,China;Quanzhou Institute of Equipment Manufacturing Haixi Institutes,Chinese Academy of Sciences,Quanzhou 362200,Fujian Province,China)

机构地区：[1]福建农林大学机电工程学院,福州350000 [2]中国科学院海西研究院泉州装备制造研究中心,福建泉州362200

出　　处：《信息技术》2025年第4期40-45,共6页Information Technology

基　　金：科技厅-福建省中科院STS计划配套项目(21e57-11bra)。

摘　　要：使用多项式方法进行几何校正时,由于轨道参数误差、测量成像参数误差和DEM高程误差的影响,在缺少地面控制点时会严重影响几何校正的精度,限制了多项式方法的使用,所以文中提出了一种基于修正轨道参数的多项式SAR图像几何校正方法。首先,形成轨道参数方程,根据轨道计算粗略地理坐标;其次,对大范围地理坐标图像进行拆分,用实际地理坐标对粗略地理坐标匹配得到轨道方程修正量,修正轨道方程;最后,使用多项式法根据修正后的轨道参数进行几何精准校正。使用了该方法对Hisea-1单视复数据进行几何校正,结果验证了该方法的可行性。When using the polynomial method for geometric rectification,the precision of the geometric rectification would be seriously affected in the absence of ground control points due to the influence of orbital parameter errors,measurement imaging parameter errors,and DEM errors.This limitation of the polynomial method has prompted the proposal of a modified orbit parameter-based polynomial SAR image geometric rectification method in this paper.Firstly,the orbit parameter equation is established to calculate rough geographic coordinates of the image.Then,the large-scale geographic coordinate image is split,and the orbit equation rectification quantity is obtained by matching actual geographic coordinates with rough geographic coordinates.The orbit equation is then corrected.Finally,the polynomial method is used for precise geometric rectification based on the corrected orbit parameters.This method is used for geometric rectification of Hisea-1 single-view complex data,and the results verified the feasibility of this method.

关 键 词：SAR图像 几何校正 轨道参数 多项式方法 海丝一号 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]