@InProceedings{BeislMiraSilv:2001:CoUsRa,
               author = "Beisl, Carlos Henrique and Miranda, Fernando Pellon de and Silva 
                         Junior, Carlos Leandro",
          affiliation = "{GSI Brooks Brasil} and {PETROBRAS. CENPES.} and OCEANSAT",
                title = "Combined use of Radarsat-1 and AVHRR data for the identification 
                         of mesoscale oceanic features in the Campos Basin, Brazil",
            booktitle = "Proceedings...",
                 year = "2001",
               editor = "Krug, Thelma and Fonseca, Leila Maria Garcia",
                pages = "739--745",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 10. (SBSR).",
            publisher = "INPE",
              address = "S{\~a}o Jos{\'e} dos Campos",
             keywords = "OCEANOGRAFIA, Bacia de Campos (RJ), Radarsat 1, AVHRR, radiometro 
                         avan{\c{c}}ado de resolu{\c{c}}{\~a}o muito alta, imagens de 
                         radar, mesoescala, din{\^a}mica do oceano, par{\^a}metros 
                         oceanogr{\'a}ficos, monitoramento ambiental, radar imagery, ocean 
                         dynamics, oceanography oarameters, advanced very high resolution 
                         radiometer, oceanography.",
             abstract = "Oceanic applications of RADARSAT-1 data include: (1)mapping 
                         mesoscale currents and regional circulation patterns; 
                         (2)identifying frontal zones, internal waves, eddies, meanders, 
                         upwelling, shears, and wind fronts. The investigated site includes 
                         coastal and oceanic areas of the Campos Basin, where oil roduction 
                         and fishery activities take place. Oceanographic dynamics is 
                         intense, with a pronounced interaction between the Brazil Current 
                         (BC)and coastal upwelling waters. The BC is a tropical, warm and 
                         saline water mass, characterized by low biologic productivity; 
                         coastal upwelling is characterized by cold water and high biologic 
                         productivity. In the interface between the BC and upwelling areas, 
                         mean flow instabilities give rise to mesoscale features (e.g., 
                         frontal zones, eddies, and meanders). Data from the AVHRR 
                         (Advanced Very High Resolution Radiometer)sensor are used as an 
                         aid to the interpretation of RADARSAT-1 images for coastal and 
                         oceanic applications. The combined use of simultaneously acquired 
                         AVHRR and RADARSAT-1 data greatly enhances SAR imaging 
                         capabilities for the identification of oceanic currents relevant 
                         to offshore operations. The AVHRR (1.1 km by 1.1 km 
                         resolution)data acquisition took place on 28 December 1997, about 
                         07:02 p.m. local time. A RADARSAT-1 ScanSAR Narrow 1 ascending 
                         image was obtained in the same day, about 07:28 p.m. local time. 
                         The Unsupervised Semivariogram Textural Classifier (USTC)was used 
                         to enhance textural domains on the RADARSAT-1 image. These 
                         features, when combined with Sea Surface Temperature (SST)maps 
                         obtained from the AVHRR data, perfectly outlined coastal upwelling 
                         waters and the inshore BC boundary (characterized by strong 
                         thermal gradients). This remarkable result demonstrates that 
                         strong thermal gradients in the SST image are expressed as sharp 
                         roughness boundaries in the USTC-classified RADARSAT-1 data.",
  conference-location = "Foz do Igua{\c{c}}u",
      conference-year = "21-26 abr. 2001",
                 isbn = "85-17-00016-1",
                label = "9059",
             language = "en",
         organisation = "Instituto Nacional de Pesquisas Espaciais",
                  ibi = "dpi.inpe.br/lise/2001/09.19.12.01",
                  url = "http://urlib.net/ibi/dpi.inpe.br/lise/2001/09.19.12.01",
           targetfile = "0739.745.076.pdf",
                 type = "Oceanografia",
        urlaccessdate = "16 jun. 2024"
}