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《Remote Sensing Technology and Application》 2017-06
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Research on Measurement Coverage and Uncertainty Analysis of GPM Microwave Imager SST Products

Zhao Hongchen;Zhou Xinghua;Liu Yongxue;Ji Xue;School of Geographic and Oceanographic Sciences,Nanjing University;The First Institute of Oceanography,SOA;Collaborative Innovation Center for the South China Sea Studies;  
Though the global precipitation measurement microwave imager(GMI)has been a new microwave sensor for about two years,no capability evaluation of GMI SST has been made.For providing some helpful information to using the products later,in the paper,monthly/annual GMI SST measurement coverage are calculated using GMI products during 4/2014 and 3/2016 and spatial and temporal variation of the coverage are also analyzed.Besides,to generate matchups set with buoy and Voluntary Observing Ship Climate(VOSClim)measurements as in-situ data strategy has been made,and retrieval uncertainty of GMI SST are finally evaluated.All the work show,(1)the GMI SST annual coverage is about 0.51,smaller than global average,which is 0.59,but it's significant bigger than Infrared SSTs;(2)using±3 h/0.1°as temporal and spatial match windows,and 6.5 m/s as a wind speed threshold to exclude outliers can eliminate some of the errors effectively;(3)GMI SST Bias is-0.02±0.89℃,and is approximate to bias of some other SST products.
【Fund】: 国家国际科技合作专项“自主星载高度计海面测高在轨绝对定标关键技术研究”(2014DFA21710);; WX0316005开展卫星海洋测绘应用
【CateGory Index】: TP73
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