@InProceedings{CarlessoVieSavBerMir:2018:CaRaDe,
               author = "Carlesso, Franciele and Vieira, Lu{\'{\i}}s Eduardo Antunes and 
                         Savonov, Graziela da Silva and Berni, Luiz Angelo and Miranda, 
                         Edson Luiz de",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Cavity radiometer development for TSI measurements",
                 year = "2018",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 7. (SBGEA)",
             abstract = "Since 1978, Total Solar Irradiance (TSI) measurements from 
                         different space missions with absolute radiometers are available. 
                         The TSI measurements accuracy and stability is crucial for 
                         reconstruction at different timescales and scientific 
                         applications. The development of an absolute radiometer is 
                         currently been done at INPE. The design of the radiometer is based 
                         on the comparison of the heating effect by optical radiation and 
                         electrical heating. These measurements rely on active cavity 
                         radiometers, which use black Ni-P interior surfaces to absorb 
                         incident sunlight. We obtained black Ni-P by electroless 
                         deposition for application in the interior of the silver 
                         electrodeposited cavities. We used bidirectional reflectance 
                         distribution function (BRDF) data to describe the surface 
                         reflectance properties of the Ni-P film. The BRDF data were used 
                         in the geometry study of the absorber cavity in a ray tracing 
                         software. These measures allowed cavities geometries optimization 
                         considering the characteristics of the black Ni-P produced at 
                         INPE. The region of the cavity heated by solar radiation were 
                         determined to place a wire-wound nearly the same region. We intend 
                         to use this cavity in a bench prototype radiometer under 
                         development. The current status of the study and obtained results 
                         are presented in detail.",
  conference-location = "Santa Maria, RS",
      conference-year = "05-09 nov",
             language = "pt",
        urlaccessdate = "09 maio 2024"
}