Analysis of solar eclipses observed by PREMOS/PICARD

Rinat Tagirov (1) , Alexander Shapiro (1) , Werner Schmutz (1) , Gael Cessateur (1) , Christoph Wehrli (1) , Gérard Thuillier (2)

1 PMOD/WRC - Physikalisch-Meteorologisches Observatorium Davos/World Radiation Center
2 STRATO - LATMOS

We perform the analysis of recent solar eclipses observed by PREcision MOnitor Sensor (PREMOS) onboard PICARD mission in six spectral channels (three UV, one visible and two near infrared). Light curves of the eclipses were used to obtain observational center-to-limb variations of solar brightness (CLV) in the corresponding wavelength ranges. The theoretical CLV were modelled with the radiative transfer COde for Solar Irradiance (COSI). We compare the theoretical results with the PREMOS measurements and discuss the constrains which our analysis of the eclipses imposes on the models of solar atmosphere. A similar investigation of eclipse light curves has been recently performed using measurements with Herzberg channel of LYRA instrument onboard PROBA-2 mission. We make the comparison of the main results and show that the measurements in six spectral channels of PREMOS allow us to significantly complement the analysis of the LYRA data.

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]; Astrophysique stellaire et solaire [astro-ph.SR]

Rinat Tagirov, Alexander Shapiro, Werner Schmutz, Gael Cessateur, Christoph Wehrli, et al.. Analysis of solar eclipses observed by PREMOS/PICARD. Davos Atmosphere and Cryosphere Assembly DACA-13, Jul 2013, Davos, Switzerland. ⟨hal-00869464⟩