PICARD Mission overview Alain Hauchecorne, Grard Thuillier (LATMOS) - PowerPoint PPT Presentation

Nov 29, 2022 •11 likes •61 views

PICARD Mission overview Alain Hauchecorne, Grard Thuillier (LATMOS) and the PICARD Team Scientific objectives Objectives: To reconstruct Total Solar Irradiance and Spectral Solar Irradiance To determine the Sun diameter and shape

PICARD Mission overview Alain Hauchecorne, Gérard Thuillier (LATMOS) and the PICARD Team
Scientific objectives Objectives: To reconstruct Total Solar Irradiance and Spectral Solar Irradiance • To determine the Sun diameter and shape • To Sound the internal structure of the sun by helioseismology • To determine if these parameters vary with solar activity In order to: Improve the knowledge of the Sun physics • Study the impact of solar activity on Earth climate •
PICARD mission components Space segment SODISM (LATMOS): Solar imager at 5 wavelengths (chromospheric: 215, 393 nm, • continuum: 535, 607, 782 nm) measuring the solar diameter and shape and for solar physics and helioseismology SOVAP (IRMB-ORB): an absolute radiometer DIARAD and a bolometer BOS • measuring the total solar irradiance and its high frequency variability PREMOS (PMOD/WRC): 2 radiometers and 3 filter radiometers measuring the total • and spectral solar irradiance Ground segment PICARD-sol (LATMOS-OCA): SODISM-2 installed at Calern to study the • atmospheric impact on solar diameter and shape measurements from ground Modelling activity Climate modelling: 3 groups involved in chemistry-climate modelling: • LATMOS/IPSL, CANADA/CMAM and PMOD/WRC Solar modelling: 3 groups involved in solar modelling : Yale Université, CEA-Saclay • and Davos/PMOD/WRC
PICARD Scientific Committee
PICARD in the international context Other solar missions in operations: Identify originality of PICARD measurements (wavelengths, time coverage, …) • synergy with other missions • Cooperation to be developed • SOLSPEC/ISS: Solar Spectral Irradiance 170-3000 nm SOHO GOLF: helioseismology • MDI: Doppler Imager 676.8 nm Ni I line • ViRGO: Total Spectral Irradiance • SDO HMI Imager 617.3 nm Fe I line SORCE SIM: Solar Spectral Irradiance SIM TIM: Total Spectral Irradiance SOLSTICE: UV spectrum SOLSTICE AIA Imager EUV, UV, continuum 450 nm

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