GNSS-R遥感国内外研究进展

全球导航卫星系统(Global Navigation Satellite System,GNSS)除传统的导航和定位功能外,其反射信号(Global Navigation Satellite Signal Reflectometry,GNSS-R)也可以被接收和利用,成为一种新型的遥感手段。本文对GNSS-R技术在海洋遥感和陆面遥感方面的研究进展进行评述,并从GNSS-R接收机、反演模型和星载GNSS-R试验3个方面阐述其关键技术,在此基础上提出GNSS-R研究中存在的问题及发展方向。

GNSS Reflectometry:A Review of Theories and Empirical Applications in Ocean and Land Surfaces

The versatile refracted,reflected and scattered signals of Global Navigation Satellite System（GNSS） have been successfully demonstrated to sound the atmosphere,ionosphere,ocean,land surfaces and the cryosphere as a new remote sensing tool.The technique of GNSS Reflectometry（GNSS-R） involves making measurements the reflections of GNSS signal from the Earth.This paper presents an overview of the theories of GNSS Reflectometry and its empirical applications in ocean（ocean altimetry,wind field,roughness,significant wave height,salinity,sea ice thickness,etc.） and land surface（soil moisture,forest biomass,snow status,etc.）.Furthermore,the key technologies of GNSS-R are reviewed including the design of special GNSS-R receivers and the construction of monitoring models.Finally,the existing problems and prospects for the near future in terms of experiment and application are analyzed.