我国GNSS-R遥感技术的研究现状与未来发展趋势

The Current Status of Research on GNSS-R Remote Sensing Technology in China and Future Development

全球导航卫星系统(GNSS)不仅能够为空间信息用户提供全球共享的导航定位信息、测速、授时等功能,还可以提供长期稳定、高时间和高空间分辨率的L波段微波信号源。近年来利用其作为外辐射源的遥感探测技术,形成了一门新的全球导航卫星系统气象学(GNSS/MET),其中GNSS-R反射信号遥感技术的兴起和发展格外引人注目。这是一种介于被动遥感与主动遥感之间的新型遥感探测技术,可以看作为是一个非合作人工辐射源、收发分置多发单收的多基地L波段雷达系统,从而兼有主动遥感和被动遥感两者的优点,越来越受到人们的关注和青睐,先后开展了许多利用GNSS系统进行大气海洋陆面遥感等领域研究工作。该文系统介绍了GNSS-R遥感技术的研究现状和发展趋势,并针对该技术给出了一个新的概念"外源助动遥感(Exogenous-Aided Remote Sensing,EARS)"。

Global Navigation Satellite System（GNSS）,has a significant impact on all areas of human activity,not only can provide users with shared global navigation,position and timing information,but also can provide a L-band microwave signal source of long term stability and high temporal-spatial resolution.In recent years,development of the navigation satellite remote sensing applications using GNSS as a external illuminator,it has been forming a new Global Navigation Satellite System METeorology（GNSS/MET）,of which Global Navigation Satellite System-Reflection（GNSS-R） signals remote sensing technology is rising.It could be considered as a non-cooperative artificial illuminator,bistatic（multi-static） radar system,and has the advantages of both passive and active remote sensing.Then it gets more and more people＇s attention and favor,and broadening into Atmosphere-ocean and land surface remote sensing fields.However,the address of this technology is very messy at home and abroad,and not able to accurately express its special meaning.This article attempts to give a new term：Exogenous-Aided Remote Sensing（EARS） for discussion.