Splinter 1: Space science & weather

1. Splinter 1: Space science & weather Chair: J. De Keyser Summary: F. Clette STCE: Space Science & Weather

2. Opportunities and issues • Key topics identified as a starting point: • Tomography: • Auroras • Plasmasphere • Solar corona • Ionosphere • Particle acceleration: • Solar flares • Aurora • Solar wind (shocks) • Ring current in radiation belts • BRAMS meteor network: • Impact risk modeling (application) • Two aspects • Fundamental sciences • Operational services STCE: Space Science & Weather

3. Tour of work packages • Operational WPs: • ROB A.1 (WDC) • Needs background solar wind models that can be run in real time, not too sophisticated (Cf.Wang-Sheeley) > need external collaborations • Open to other indices or forecasts > need to identify possible examples • BISA B.1/2: Mission/data center at BUSOC: • So far, centers for PICARD and PROBA2 have been developed independently. • PROBA2 wants to keep an immediate proximity to the data. • BISA D.1: SW services • Focus on SPENVIS and educational aspects, ESA SW portals (COST programs) • Development of a document repository jointly with SIDC and SoTerIA accessible for the whole SW community: www.spaceweather.eu • Opportunity for inclusion of statistical models or physical models and produce small predictions: • Trying a few products and testing the interest of users. • Need to identify applicable tools • Observational WPs: • ROB-A.2 (G-B solar instrum): • Solar data source • Possible cross-studies about long term geomagnetic indices STCE: Space Science & Weather

4. Tour of work packages • Research WPs: • ROB-A.3 Coronal heating: • Opportunity for physical modeling of reconnection process (see below BISA C.1) • ROB-A.4 Solar atmosphere studies: • No tomography but simple triangulation (loops, CMEs; STEREO data) • No internal particle acceleration know-how (theory). • ROB B.1: GNSS 4-D tomography • So far, tools from english collaborators, no internal modelling development. • ROB B.2/3: GNSS TEC effects • Opportunity to develop a model of the plasmasphere-ionosphere connection • Advantage: TEC provides many sampling points every 20 minutes. • Possible synergy with BISA WP (V. Pierrard) and RMI (Ionospheric sounding group) • BISA C.1: Magnetosphere • Opportunities: plasma phenomena, like magnetic reconnection, observed in-situ in the magnetosphere > applicable to the solar corona • Uncertain that the phenomena can be transposed easily to the solar conditions • Maybe common aspects for substorms STCE: Space Science & Weather

5. Tour of work packages • Research WPs: • BISA C.2 Experiments: • BRAMS meteor network: • Opportunity for impact risk modeling (application) • BISA C.3 Fundamental science: • Focus in kinetic models: kinetic Alfven waves, application to the plasmasphere. • Physics-based modelisation of the solar wind: • Need boundary conditions at the Sun: number density and temperature (boundary values or better, radial profiles) • ROB works on large-scale effects (~300 km per pixcel) where MHD is appropriate: kinetic models have not been considered until now. STCE: Space Science & Weather

6. New ideas and upcoming opportunities? • Tomography: potential topic but not currently developed (mostly users of existing external packages) • Background solar wind models: • Reciprocal but unmatched needs: • RWC services need an operational real-time model for forecasting • BISA modeling needs solar boundary conditions (but currently output limited to spherical symmetry) • Large long-term effort • Particle acceleration: • Potential for fundamental science between ROB A.3/4 and BISA C.3 • Upcoming FP7 proposal in preparation (application). • Collaboration between BISA C.3 and ROB-A.1/2 on the use F10.cm as a proxy for ionospheric conductivity. • BRAMS meteor experiment • Space Situational Awareness program STCE: Space Science & Weather