A profundidade óptica em 45 e 90 GHz no observatório do El Leoncito

• Autor(a) principal: Iamazaki, Celi Cristina Passarelli
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do Mackenzie
• Texto Completo: http://dspace.mackenzie.br/handle/10899/24143
• topic: profundidade óptica; fluxo solar; ondas milimétricas; tipping; PWV; polarização; CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOFISICA

The optical depth is an important parameter of adjustment in obtaining the correct energy flow that characterizes a solar explosion. Therefore, knowing its value and the variables that influence its modification through the year, in each locality is fundamental. Thus, A statistical analysis of the opacity values was made in the years 2012 and 2013 for the operating frequencies of the radio telescopes poems. The opacity values were obtained through the "tipping" method for 45 GHz and 90 GHz. As a result it was obtained from the average value of the optical depth for the year 2012 for the frequencies of 45 GHz and 90 GHz (0.069 ± 0.005 np and 0.057 ± 0.014 NP respectively) and for 2013 the values of 0.068 ± 0.005 NP for 45 GHz and 0.057 ± 0.017 for 90 GHz. Also if f EZ A study for these same frequencies, of the opacity values for several seasons of the year, for the years 2012 and 2013, observing a differentiated pattern of opacity for the wet season (Summer/early autumn), the rest of the year (dry season) for both Study frequencies. From the analyses it was noted that the opacity measurements of 90 GHz were more unstable than those of 45 GHz, and that the opacity values were not increasing with the frequency, contradicting what was expected in the literature. For the two years, we also obtained a relationship between the frequencies of each other in the dry season, and it was observed that the opacities were interchangeable, which is important for the frequency of 90 GHz that produces less data by the "tipping" method and is noisiest. Therefore, the ratio 90= (3,499±0.063).45-(0,181±4,5x10-3) and for 2013 we obtained 90= (3,173± 0.0,070).45+(0.158±4, 5x10-3), at last. For the biennium 2012/2013 the obtained result was 90 = (3,384 ± 0,041).45-(0,173 ± 2, 9x10-3). Statistical studies were also performed for PWV in the analyzed periods (2012/2013) and PWV values (obtained through The AERONET network located in EL Leoncito) related to the opacity generating expressions for the two frequencies of POEMAS: 90 =(8,3x10- 3±2,3x10-5).PWV + (3,3x10-2±2,7x10-4) and 45= (2, 2x10-3±2,3x10-5).PWV+(6, 2x10- 2±8,5x10-5). Finally, some simulations were performed with the ATM - Atmospheric Transmission at microwaves software that showed concordance between the model values and the opacity obtained Experimentally.