A first comprehensive evaluation of China's GNSS-R airborne campaign: part II—river remote sensing

查看全文 作　　者：Weihua [1]Bai;Junming [1]Xia;Wei [2,3]Wan;Limin [4,5]Zhao;Yueqiang [1]Sun;Xiangguang [1]Meng;Congliang [1]Liu;Hua [1]Chen;Qifei [1]Du;Dongwei [1]Wang;Danyang [1]Zhao;Xianyi [1]Wang;Cheng [6]Cheng

机构地区：[1]National Space Science Center, Chinese Academy of Sciences;[2]State Key Laboratory of Hydroscience and Engineering,Tsinghua University;[3]Department of Hydraulic Engineering, Tsinghua University;[4]Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences;[5]The Center for National Spaceborne Demonstration;[6]State Intellectual Property Office of the Peoples’ Republic of China

出　　处：《Science Bulletin》索引2015年第60卷第17期,共8页

基　　金：supported by the National Youth Natural Science Foundations of China(41405040 and 41405039);the Scientific Research and Equipment Development Project of Chinese Academy of Sciences(YZ201129);the 12th Five-Year Plan of Civil Aerospace Technology Advanced Research Projects(Y1K0030044) 摘　　要：The Global Navigation Satellite System Reflectometry(GNSS-R) has been proven to be a powerful technique for retrieving geophysical parameters of ocean and land. Airborne GNSS-R is an important experimental platform, because it is not only needed as validation for spaceborne application, but also possesses the advantages to be capable of remote sensing of small and medium scale targets, such as rivers and lakes. This paper presents an overview of China's airborne GNSS-R campaign conducted on May 30, 2014, in Henan. The campaign has two objectives, i.e.:(1) to examine the capability of a GNSS-R payload developed by National Space Science Center,Chinese Academy of Sciences(NSSC, CAS) for airborneobservations and(2) to study the algorithms for soil moisture and river remote sensing, including altimetry and flow velocity measurement. A previous paper has presented results of soil moisture retrieval as part I, and in this paper,initial results of the Yellow River remote sensing are presented as part II. This paper presents the river altimetry results and explores a new potential application of GNSS-R technology, which is used to detect the flow velocity of the river. The river surface height results observed by code delay altimetry method were consistent with the height results of GPS dual-frequency differential positioning altimetry. The GNSS-R altimetry results showed that decimeter level heights were achieved in 1-min sliding average. Comparing with in situ measurements, the GNSSR flow velocity result was reasonable; the error was about0.027 m/s, which indicated the validity and feasibility of using GNSS-R technique to detect river flow velocity. 关键词：中国科学院院士机载遥感综合评价远程全球导航卫星系统技术检测地球物理参数流速测量

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A first comprehensive evaluation of China's GNSS-R airborne campaign: part II—river remote sensing

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