矩阵条件数在机载InSAR参数定标中的应用

Calibration of Airborne Interferometric SAR Parameters with Matrix Condition Number

机载干涉合成孔径雷达参数定标中,敏感度方程的应用普遍。定标参数的精度取决于敏感度矩阵的条件数。利用条件数在线性方程组求解中的应用,优化了机载InSAR定标性能。针对机载InSAR定标方程中的敏感度矩阵,基于矩阵最小条件数理论,提出了定标参数组合方案和地面控制点布放方案。实验采用真实干涉合成孔径雷达数据,结果验证了方法的有效性。

In the calibration of airborne Interferometric Synthetic Aperture Radar （InSAR） parameters, sensitivity equation is often used. It is common sense that its solution＇s accuracy is strongly affected with the sensitivity matrix condition number. So, on the basis of the minimum condition number, for the purpose of enhancing the calibration performance, calibration paramaters＇combination and the placement of Ground Control Points （GCPs） were advanced. Some airborne InSAR data were used to do calibration experiments with the proposed method. Their results demonstrate it is efficient.