Gérard Thuillier, Service d’Aéronomie du CNRS Jean-Yves Prado, CNES

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Presentation transcript:

Gérard Thuillier, Service d’Aéronomie du CNRS Jean-Yves Prado, CNES The PICARD Mission Gérard Thuillier, Service d’Aéronomie du CNRS Jean-Yves Prado, CNES

PICARD MISSION MAIN SCIENTIFIC OBJECTIVES (1) Determine the variability of several global solar properties. In particular, wether the solar diameter varies or not with solar activity by a non ambiguous measurement. (2) Modelling of the solar machine Role of the magnetic field, on surface or deeper in the convective zone. (3) Contribution to solar luminosity reconstruction (4) Long term trend ESWW#4 Brussels 5-9 November, 2007

PICARD SCIENTIFIC PRODUCTS in orbit: - Diameter, limb shape and asphericity in the continuum - TSI (x2) - 5 spectral channels (215,393, 535, 607, 782 nm) - Activity (images at 215 nm and Ca II)=> space weather - Solar oscillations from the ground : - diameter, limb shape and asphericity, - local atmosphere turbulence ESWW#4 Brussels 5-9 November, 2007

SOVAP (IRM) ESWW#4 Brussels 5-9 November, 2007

PREMOS 2 (PMOD) •2 absolute radiometers •3 filter radiometers Spectral solar irradiance at 215, 268, 535 and 782 nm Total Irradiance with 2 Radiometers PMO6-V (type „SOHO/VIRGO“) ESWW#4 Brussels 5-9 November, 2007

Reference stars images Thermal behaviour critical SODISM (SA/CNRS) Images of the Sun by a 2kx2k CCD 5 channels 3 for diameter 2 for activity Reference stars images Thermal behaviour critical ESWW#4 Brussels 5-9 November, 2007

PICARD - SOL ESWW#4 Brussels 5-9 November, 2007

PICARD MISSION MAIN FEATURES Sun synchronous orbit 6h/18h altitude 710 km No propulsion Launch by a DNEPR, autumn 2008 S- Band telemetry ~2 Gbit/day Science Operation Center inBelgium Minimum mission duration 2 years Possible extension to 3 years Deorbitation <60 years Authorization to proceed into phases C/D expected soon ESWW#4 Brussels 5-9 November, 2007

2 years after the mission end, DATA POLICY Co’Is OCA Nice University IAS LMD Yale university HAO, GSFC JPL, NRL Barcelona U PI teams SA (F) IRMB (B) PMOD (Ch) Guest Investigators AO to be released after launch Space weather products immediately available ILWS All data available 2 years after the mission end, at the latest ESWW#4 Brussels 5-9 November, 2007

THE PICARD SPACECRAFT SOVAP PREMOS2 SODISM ESWW#4 Brussels 5-9 November, 2007