@MastersThesis{Arai:2002:FeExPr,
               author = "Arai, Egidio",
                title = "Uma ferramenta para extrair e processar dados do sensor SEAWIFS",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2002",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2002-09-13",
             keywords = "processar dados, sensor SEAWIFS.",
             abstract = "Atualmente existem uma diversidade de sat{\'e}lites de recursos 
                         naturais, que carregam a bordo sensores multiespectrais, que 
                         fornecem dados que podem ser utilizados de v{\'a}rias formas. 
                         Dentre estes sensores destaca-se Sea-viewing Wide Field-of-view 
                         sENSOR (seaWIFS), que est{\'a} a bordo do sat{\'e}lite Seastar e 
                         foi concebido para examinar os fatores biogeoqu{\'{\i}}micos que 
                         afetam as mudan{\c{c}}as clim{\'a}ticas globais. As imagens 
                         deste sensor se encontram dispon{\'{\i}}veis no formato 
                         Hierarchical Data Formal (HDF), que a NASA definiu como 
                         padr{\~a}o para amarzenar e disseminar os dados dos novos 
                         sensores sob sua responsabilidade. A falta de uma ferramenta para 
                         manipular dados do sensor SeaWIFS na plataforma PC/Windows motivou 
                         a execus{\~a}o deste trabalho. Assim, apresenta-se uma 
                         ferramenta, WinSWHDF, para extrair e processar os dados 
                         provenientes deste sensor. Devido a caracter{\'{\i}}stica da 
                         variedade de dados gerados pelo sensor SeaWIFS, o formato HDF 
                         {\'e} capaz de acomodar essas informa{\c{c}}{\~o}es de forma 
                         organizada e confi{\'a}vel. A ferramenta desenvolvida, {\'e} 
                         capaz de extrair n{\~a}o s{\'o} as imagens, mas tamb{\'e}m os 
                         dados de navega{\c{c}}{\~a}o para possibilitar a convers{\~a}o 
                         para a proje{\c{c}}{\~a}o cil{\'{\i}}ndrica equidistante. Na 
                         corre{\c{c}}{\~a}o radiom{\'e}trica foi implementado somente a 
                         corre{\c{c}}{\~a}o devido a degrada{\c{c}}{\~a}o dos 
                         detectores do sensor com o tempo. Al{\'e}m disso, a ferramenta 
                         oferece a op{\c{c}}{\~a}o de realizar a corre{\c{c}}{\~a}o 
                         atmosf{\'e}rica. O WinSWHDF foi desenvolvido em ambiente Windows 
                         possuindo recursos de visualiza{\c{c}}{\~a}o e processamento de 
                         imagens, composi{\c{c}}{\~a}o de mosaicos e a 
                         sobreposi{\c{c}}{\~a}o do contorno pol{\'{\i}}tico do Brasil e 
                         de seus estados. A ferramenta desenvolvida permite gerar 
                         v{\'a}rios produtos para diferentes {\'a}reas de pesquisa. 
                         Implementou-se tamb{\'e}m nesta ferramenta, rotinas para o 
                         c{\'a}lculo do {\'{\i}}ndice de vegeta{\c{c}}{\~a}o por 
                         diferen{\c{c}}a normalizada (IVDN) para estudo da cobertura 
                         vegetal, que foi utilizado para a avalia{\c{c}}{\~a}o dos dados 
                         SeaWIFS. ABSTRACT: Currently exist a diversity of earth 
                         Observation satellites, that carry on board a variety of 
                         multispectral sensors, providing data that can be used in serveral 
                         forms. Amongst these sensors we can mention the Sea-viewing Wide 
                         Field-of-view Sensor (SeaWIFS), which is on board the Seastar 
                         satellite and was conceived to study biogeochemicastry factors 
                         that affect global climate changes. The data from this sensor ae 
                         available in Hierarchical Data Format (HDF), that NASA defined as 
                         the standard formart for storage and distribution of the data from 
                         new sensors under its responsibility. The lack of tools to 
                         manipulate data from SeaWIFS in the PC/Windows platform motivated 
                         the development of this work. Then work describes a tool for 
                         extracting and processing the data acquired by this sensor. Due to 
                         the characteristic of the variety of the data from this sensor , 
                         HDF is capable to accomodate these information in an organized and 
                         reliable form. The developed tool, Win SWHDF, is capable to 
                         extract the images, and also the navigation and calibration 
                         information, which are used in their geometric and radiometric 
                         corretions. For the geometric corretion, a navigation algorithm 
                         was implemented to make possible the conversion, a equidistant 
                         cylindrical projection. The radiometric correction is performed to 
                         compensate the degradation of the sensor's detectors. Moreover, 
                         the tool offers the option to apply the atmospheric corretion. The 
                         WinSWHDF was developed in Windows platform providing resources of 
                         images visualization and processing composition of mosaics and the 
                         overlapping of the political contour of Brazil and its States. The 
                         developed tool allows to generate some products for different 
                         research areas. For this work, the Normalized Difference 
                         Vegetation Index (NDVI) to study vegetation cover was generated in 
                         oder to evaluate the SeaWIFS data.",
            committee = "Vijaykumar, Nandamudi Lankalapalli (presidente) and Ning, Carlos 
                         Ho Shih (orientador) and Shimabukuro, Yosio Edemir (orientador) 
                         and Ferreira, Nelson Jesus and Bastos, Eduardo Jorge de Brito",
           copyholder = "SID/SCD",
         englishtitle = "A tool for extracting and processing data from SEAWIFS sensor",
                label = "10569",
             language = "pt",
                pages = "159",
                  ibi = "6qtX3pFwXQZ3r59YCT/H3LJL",
                  url = "http://urlib.net/ibi/6qtX3pFwXQZ3r59YCT/H3LJL",
           targetfile = "Eg{\'{\i}}dio Arai.pdf",
        urlaccessdate = "02 maio 2024"
}