合成孔径雷达高度计数据处理方法  

The Ground Process Segment of SAR Altimeter

作　　者：杨双宝[1] 翟振和[2] 许可[1] 王志森[1] 史灵卫[1] 王磊[1] 崔海英[1] 徐曦煜[1] 

机构地区：[1]中国科学院微波遥感重点实验室中国科学院国家空间科学中心,北京100190 [2]西安测绘研究所,陕西西安710054

出　　处：《遥感技术与应用》2017年第6期1083-1092,共10页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目"合成孔径高度计回波波形经验函数构建与抗差估计方法研究"(41674082)

摘　　要：合成孔径雷达高度计的关键技术特点是沿轨向的多普勒锐化和延迟距离校正技术。两者的结合使得其相对于传雷达高度计具有沿轨向高分辨率和显著提高测高精度的优势。数据处理技术是其成功获得这两个优势的重要保证。为此,在分析合成孔径雷达高度计测高原理的基础上,研究了数据处理涉及的关键技术,包括波束锐化,延迟校正以及二次距离校正,多视处理,回波模型以及重跟踪所用的梯度函数等。同时,利用仿真实验数据和机载试验数据对合成孔径雷达高度计测高能力进行了验证,初步验证了合成孔径雷达高度计的优越性。The key innovation technology of SAR Altimeter （Synthetic Aperture Radar Altimeter）are Doppler-beam sharpen and delay/Doppler range compensation. The cooperation of these two technologies makes it has high along track resolution and high precision in height measurement.The ground processor is the key hinge to make sure that SAR altimeter could obtain these superiorities.Many key technologies for SAR altimeter processor, such as Doppler beam-sharpen, delay/Doppler compensation and the second range correction,multilook,echo model and gradient function for retracker,are introduced in the paper.Based on the processor and related work, some simulation work and airborne experiment were tested by the proces- sor,and both of the quantity results show that the SAR altimeter has more potential superiorities.

关 键 词：雷达高度计 合成孔径 波束锐化 距离校正 回波模型 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]