GNSS-R土壤水分反演研究进展  

Research progress on GNSS soil moisture inversion

作　　者：覃湘栋 庞治国[1,2] 路京选 吕娟[1,2] QIN Xiangdong;PANG Zhiguo;LU Jingxuan;LYU Juan(China Institute of Water Resources and Hydropower Research,Beijing 100038;Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources(Flood and Drought Disaster Prevention Center),Beijing 100038)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部防洪抗旱减灾工程技术研究中心(水旱灾害防御中心),北京100038

出　　处：《中国防汛抗旱》2024年第4期22-27,共6页China Flood & Drought Management

基　　金：中国卫星导航系统重大专项(GFZX030303020127);国家自然科学基金项目(51779269)。

摘　　要：土壤水分是陆地水循环中最活跃的部分,是影响水文、生物生态和生物地球化学过程的关键变量。全球导航卫星系统反射测量(GNSS-R)技术由于使用L波段的电磁波且具备高频观测的能力,是土壤水分监测的有效手段。北斗卫星导航系统(BDS)是我国自行研制的全球卫星导航系统,土壤水分监测也是其业务应用的重要组成部分。从观测平台、反演方法两方面对当前GNSS-R反演土壤水分的研究进行了总结分析,指出了不同反演方法的优势和劣势,并进一步阐明了BDS对GNSS-R土壤水分反演研究的主要贡献和优势。Soil moisture is the most active part of the terrestrial water cycle,and it is a key variable that affects hydrological,bio-ecological,and bio-geochemical processes.Global Navigation Satellite System-Reflectometer(GNSS-R)technology is an effective means of soil moisture monitoring because it uses L-band electromagnetic waves and has high-frequency observation capabilities.The BeiDou satellite navigation system(BDS)is a global satellite navigation system independently developed by China.Soil moisture monitoring is also an important part of its business applications.The article summarizes and analyzes the current research on GNSS-R inversion of soil moisture from two aspects of observation platforms and inversion methods,and points out the advantages and disadvantages of different inversion methods,and further elucidating the main contributions and advantages of the BeiDou Navigation Satellite System in GNSS-R soil moisture inversion research.

关 键 词：土壤水分 全球导航卫星系统反射测量(GNSS-R) 北斗卫星导航系统(BDS) 土壤反射率 

分 类 号：S152.7[农业科学—土壤学] TP79[农业科学—农业基础科学]