[关键词]
[摘要]
外部校准是实现合成孔径雷达（SAR）系统绝对定标的有效途径。常规SAR外部校准方法不适用于低频超宽带SAR系统。文中充分考虑低频UWBSAR系统的三大特性：低频，超宽带以及大处理角，结合外部校准的数学模型，给出适合该系统的外部校准方案，讨论了外部校准过程中的场景选择，定标体布置以及校准误差等问题。
[Key word]
[Abstract]
External calibration is an effective way to calibrate absolutely the synthetic aperture radar(SAR) system,but the external calibration method used for conventional SAR system cannot be implemented for low frequency ultra wideband(UWB) SAR system.In this paper,three characteristics of UWBSAR are fully taken into account: low frequency,ultra wideband and large processing angle,and using the math model of the external calibration,an external calibration scheme is suggested.The selection of reference scenes,location of calibrators and calibration errors are discussed.
[中图分类号]
TN958
[基金项目]
“十五”国防预研基金资助项目
