@ElectronicSource{RozanteMoreGoncVila::TeVaOv,
             abstract = "The measure of atmospheric models performance is highly dependent 
                         on the quality of the observations used in its evaluation process. 
                         In the particular case of operational forecast centers, large 
                         scale datasets should be made available in a time manner for 
                         continuous assessment of models results. Numerical models and 
                         surface observations usually work at distinct spatial scales (i.e. 
                         point measurements versus areal average in a regular grid), making 
                         direct comparison a hard task. Alternatively, interpolation 
                         methods are employed for mapping observational data to regular 
                         grids and vice-versa. A new technique (hereafter called MERGE) to 
                         combine TRMM satellite precipitation estimates with surface 
                         observations over the South American continent is proposed and its 
                         performance evaluated for the Summer and Winter trimesters of 
                         2007. Two different approaches for the evaluation of the 
                         performance of this product against observations were tested: a 
                         cross-validation sub-sampling the entire continent and other 
                         sub-sampling only areas with sparse observations. Results show 
                         that over areas with high density observations the MERGE technique 
                         performance is equivalent to simply average stations over the grid 
                         boxes however, over areas with sparse observations MERGE has shown 
                         superior results.",
              address = "S{\~a}o Jos{\'e} dos Campos",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
               author = "Rozante, Jos{\'e} Roberto and Moreira, Demerval Soares and 
                         Goncalves, Luis Gustavo G. de and Vila, Daniel A.",
             keywords = "*.",
             language = "en",
       lastupdatedate = "2009-09-16",
            publisher = "Instituto and Nacional and de and Pesquisas and Espaciais",
                  ibi = "8JMKD3MGP8W/363QCSL",
                  url = "http://urlib.net/ibi/8JMKD3MGP8W/363QCSL",
           targetfile = "v1.pdf",
                title = "Combining TRMM and Surface Observation Precipitation: Technique 
                         and Validation Over South American",
         typeofmedium = "On-line",
        urlaccessdate = "15 jun. 2024"
}