%0 Conference Proceedings
%4 sid.inpe.br/mtc-m18@80/2008/12.09.11.55
%2 sid.inpe.br/mtc-m18@80/2008/12.09.11.55.58
%F self-archiving-INPE-MCTIC-GOV-BR
%T Calibration of interferometric solar observations using gps satellites
%D 2008
%A Madsen, Felipe Ramos Hald,
%A Silva, Jorge Fernando Valle,
%A Cecatto, José Roberto,
%A Sawan, Hanumant Shankar,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Reunião Anual da Sociedade Astronômica Brasileira, 34.
%C Passa Quatro, MG
%8 7 a 11 set.
%S Anais
%X Solar interferometric data are usually not uniquely and completely calibrated due to the lack of calibrator sources with fluxes of the same order or higher than that of the Sun. On the other hand, the satellites of the Global Positioning System (GPS) can be regarded as point sources for most of the solar-observing arrays, with well known orbits and power transmitted, so that the resulting flux on Earths surface is higher than that of the Quiet Sun at 1575 MHz. Based on these, we propose a new technique that is currently under development and is presented in this work, making use of GPS satellites as calibrator sources for interferometric solar observations. We applied this calibration technique to solar observations using the prototype of the Brazilian Decimetric Array (PBDA), during the period from May to September, 2007. The results indicate that the GPS signals are adequate for calibration of very strong sources and can be applied to interferometric solar observations.
%@language pt
%3 Madsen_calibration.pdf