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Reconstruction of incomplete satellite SST data sets based on EOF method

Acta Oceanologica Sinica 2009年第2期28卷 36-44页

作者： DIng Youzhuan WEI Zhihui MAO Zhihua WAng Xiaofei PAN Delu Department of Computer Nanjing University of Science and Technology Nanjing 210094 China state key {2. of Satellite Ocean Envionment Dynamics Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

As for the satellite remote sensing data obtained by the visible and infrared bands myers,on, the clouds coverage in the sky over the ocean often results in missing data of inversion products on a large scale, and thin clouds difficult to be detected would cause the data of the inversion products to be abnormal. Alvera et a1.（2.05） proposed a method for the reconstruction of missing data based on an Empirical Orthogonal Functions （EOF） decomposition, but his method couldn＇t process these images presenting extreme cloud coverage（more than 95%）, and required a long time for recon- struction. Besides, the abnormal data in the images had a great effect on the reconstruction result. Therefore, this paper tries to improve the study result. It has reconstructed missing data sets by twice applying EOF decomposition method. Firstly, the abnormity time has been detected by analyzing the temporal modes of EOF decomposition, and the abnormal data have been eliminated. Secondly, the data sets, excluding the abnormal data, are analyzed by using EOF decomposition, and then the temporal modes undergo a filtering process so as to enhance the ability of reconstruct- ing the images which are of no or just a little data, by using EOF. At last, this method has been applied to a large data set, i.e. 43 Sea Surface Temperature （SST） satellite images of the Changjiang River （Yangtze River） estuary and its adjacent areas, and the total reconstruction root mean square error （RMSE） is 0.82.. And it has been proved that this improved EOF reconstruction method is robust for reconstructing satellite missing data and unreliable data.

关键词： EOF SST Changjiang River estuary Missing data sets

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The Optical Design Of Dye-Sensitized Nanocrystalline Solar Cells

The Optical Design Of Dye-Sensitized Nanocrystalline Solar C...

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2.04全国太阳能光化学与光催化学术会议

作者： Xizhe Liu, Q.B. Meng. C.X Gao, B.F. Xue, H.X. Wang, ***, O. Sato and A. Fujishima ((Beijing National laboratory for Condensed Matter Physics.lnstitute of Physics, Chinese Academy of Sciences, Beijing, 100080, china qbmeng@{2.. iphy. ac. cn & cxgao599@yahoo. com, cn state key laboratory of Superhard Materials,Institute of Atoms and Molecules, JiLin University, ChangChun, 130012. china. Reseach laboratory for Optical Science, Kanagawa Academy of Science and Technology, KSP BLDG. EAST 412. Sakado, Kawasaki 2.3-0012. Japan)

＜正＞ Dye-Sensitized Nanocrystalline Solar Cells（DSSC）is a new kind of solar cell,which may be analternative to conventional silicon-based solar *** factors determine the overall efficiency ofsuch a cell for example TiO2.films,dyes,electrolyte,optical property of materials *** most ofthese factors have been studied extensively,the optical process in DSSC was studied very *** anoptical device,DSSC’S optical property is certainly *** this paper we developed a model,which

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