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@MastersThesis{DelCiampo:1990:VaEmCe,
               author = "Del Ciampo, Lineu Fernando",
                title = "Varia{\c{c}}{\~a}o da emiss{\~a}o centim{\'e}trica de 
                         V{\^e}nus segundo sua fase",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "1990",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "1989-10-02",
             keywords = "Planeta V{\^e}nus, radioemiss{\~a}o, ondas 
                         cent{\'{\i}}metras.",
             abstract = "A radioemiss{\~a}o do planeta V{\^e}nus, em comprimentos de onda 
                         menores que 10 cm, apresenta algumas flutua{\c{c}}{\~o}es na 
                         temperatura de luminosidade. As raz{\~o}es dessas 
                         flutua{\c{c}}{\~o}es ainda s{\~a}o inconclusivas. Durante 1988, 
                         V{\^e}nus estava relativamente mais perto da Terra que nos anos 
                         precedentes e tamb{\'e}m apresentou mudan{\c{c}}as de 
                         {\^a}ngulo de fase larga ao longo do ano. Esta 
                         configura{\c{c}}{\~a}o orbital excepcional possibilitou ao 
                         programa uma extensa s{\'e}rie de observa{\c{c}}{\~o}es com o 
                         escopo de descobrir se h{\'a} algumas flutua{\c{c}}{\~o}es na 
                         temperatura de luminosidade planet{\'a}ria associada {\`a} sua 
                         fase. Para este programa foi usada a antena de 13,7 m do 
                         Radiobservat{\'o}rio de Itapetinga, sendo as 
                         observa{\c{c}}{\~o}es realizadas em 22 e 43 GHz. Este trabalho 
                         apresenta os resultados observacionais da temperatura de 
                         luminosidade de V{\^e}nus, de mar{\c{c}}o a outubro de 1988, que 
                         mostra algumas flutua{\c{c}}{\~o}es nesta temperatura. Os 
                         resultados das observa{\c{c}}{\~o}es sugerem que a 
                         varia{\c{c}}{\~a}o da temperatura de luminosidade {\'a} 
                         provavelmente devida ao {\^a}ngulo de fase do planeta. Esta 
                         varia{\c{c}}{\~a}o de temperatura pode ser devida a 
                         varia{\c{c}}{\~o}es na abund{\^a}ncia de S02, H20 e H2SO4 
                         gasoso, que s{\~a}o os principais absorventes nesses comprimentos 
                         de onda. ABSTRACT: The radio emission from the planet Venus, at 
                         wavelengths smaller than 10 centimeter, presents some fluctuations 
                         in the brightness temperature. The reasons for those fluctuations 
                         are still inconclusive. During 1988, Venus was relatively closer 
                         to the Earth than in the preceeding years and also presented large 
                         phase angle changes along the year. This exceptional orbital 
                         configuration allowed to program an extensive series of 
                         observations with the scope of finding out if there is any 
                         fluctuation in the planetary brightness temperature associated to 
                         its phase. For this program it was used the 13.7 m antenna of the 
                         Itapetinga Radio Observatory, being the observations carried out 
                         at 22 GHz and 43 GHz. This work present the observacional results 
                         of Venus brightness temperature, from March to October 1988, wich 
                         shows some fluctuations in this temperature. The results of 
                         observations suggest that the variation of the brightness 
                         temperature is probably due to the phase angle of the planet. This 
                         temperature variation may be due variations in the abundance of 
                         SO2, 1120 and gaseous H 2SO 4 , wich are the main absorbers in 
                         those wavelengths.",
            committee = "Scalise J{\'u}nior, Eug{\^e}nio (presidente/orientador) and 
                         Lazzaro, Daniela and Abraham, Zulema and Kotanyi, Christopher",
           copyholder = "SID/SCD",
         englishtitle = "x",
             language = "pt",
                pages = "97",
                  ibi = "8JMKD3MGP3W34P/3PTGGH8",
                  url = "http://urlib.net/ibi/8JMKD3MGP3W34P/3PTGGH8",
           targetfile = "INPE-5122.pdf",
        urlaccessdate = "28 mar. 2024"
}


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