GNSS-R应用于海冰厚度的遥感模拟  

Remote sensing simulation of sea ice thickness using GNSS-R

作　　者：张玄黎 高洪兴[1] 杨东凯[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《导航定位学报》2017年第3期19-23,共5页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(61171070)

摘　　要：针对传统海冰厚度探测手段存在成本和计算复杂度高的问题,提出基于GNSS-R技术的空气-海冰-海水3层介质模型,重点分析GNSS反射信号与海冰介质厚度的关系;利用GNSS反射信号的几何关系和极化特征,推导出海冰反射率(反射信号左旋极化分量与直射信号右旋极化分量的功率值之比)与海冰介质厚度的数学表达式。实验结果表明海冰反射率和海冰介质厚度之间具有明显的相关性。Aiming at the problem that there is high cost and computational complexity in traditional detection means of sea ice thickness,the paper proposed the model with three layer medium including air,sea ice and sea water based on GNSS-R,focusing on the relationship analysis of GNSS reflected signals and the thickness of sea ice;by using the geometric relations and the polarization characteristics of GNSS reflected signals,it deduced the mathematical expressions between sea ice reflectivity（R-LHCP/D-RHCP）and sea ice thickness.Experimental result showed that there exists an obvious correlation between sea ice reflectivity and the thickness of sea ice.

关 键 词：海冰厚度 GNSS-R 反射率 极化 几何关系 

分 类 号：P228[天文地球—大地测量学与测量工程]