1. SWWT plenary meeting / 28 June 2011 Brussels Atmospheric Effects Topical Group Reporting period: 2010 – June 2011 1.ATMOP 2.MURI/NADIR (USA) 3.ESA GOCE+ theme 3: density and winds

2. SWWT plenary meeting / 28 June 2011 Brussels ATMOP Advanced Thermosphere Modelling for Orbit Prediction Space Call 3 – FP7-SPACE-2010-1

3. SWWT plenary meeting / 28 June 2011 Brussels ATMOP partners DEIMOS Space (DMS), Spain –Project Leader (PL): N. Sánchez Ortiz, Project Coordinator Centre National de la Recherche Scientifique (CNRS), France –LPG Grenoble: Ch. Lathuillère (PL) ; LPC2E, Orléans: Th. Dodok de Wit ; LATMOS, Paris : M. Menvielle Collecte Localisation Satellites (CLS), France –PL: J.-J. Valette Met Office (MET), United Kingdom –PL: D. Jackson Centre National dEtudes Spatiales (CNES), France –PL: S. Bruinsma University College London (UCL), United Kingdom –PL: A. Aylward Kybertec S.R.O (KYBERTEC), Czech Republic –PL: O. Sládek

4. SWWT plenary meeting / 28 June 2011 Brussels ATMOP objectives DTM: Development of an advanced semi-empirical Drag Temperature Model –that has the potential to be adapted for near-real-time operation and –that is accurate enough to meet the requirements set by space agencies for orbit computations.. PHMOD: Physical modelling of the thermosphere PROX: Define and assess new proxies to describe the external (EUV and geomagnetic) forcing of the Thermosphere by the Sun which take advantage of the present state of the art in observational and data analysis capabilities. THERM: Support European research activities on forecasting techniques: –by upgrading assimilation of thermospheric data into an existing semi-empirical model for near-real time prediction –by developing thermospheric data assimilation based on a global physical thermosphere-ionosphere coupled model (CMAT2)

5. SWWT plenary meeting / 28 June 2011 Brussels ATMOP Work Packages WP1Project Management DEIMOS WPL: N. Sánchez Ortiz WP2 Forcing the thermosphere: physical processes and proxies for semi- empirical modelling CNRS WPL: Ch. Lathuillère PROX, DTM, PHMOD WP3 Physical Modelling of thermospheric drag processes UCL WPL: A. Aylward PHMOD, DTM WP4 Semi-empirical modelling of the thermosphere CNES WPL: S. Bruinsma DTM WP5 Data assimilation for global analysis and near-real time prediction Met Office WPL: D. Jackson THERM, DTM, PHMOD WP6Dissemination CNRS WPL: M. Menvielle

6. SWWT plenary meeting / 28 June 2011 Brussels ATMOP outputs and deliveries Fully documented harmonized database of thermospheric densities ATMOP website: –CD with all documentation and software for website installation on any platform Solar EUV bands and proxies to be used as inputs for the DTM model: –Recommendations for the most appropriate EUV bands and proxies –Numerical database –Nowcast and prototype forecast Geomagnetic proxies to be used as inputs for the DTM model: –Recommendations for the most appropriate EUV bands and proxies –Numerical database –Nowcast and prototype forecast Physical investigations on electrodynamic forcing Comparison between physical model (CMAT2) outputs and observation data 1 1 2 2 3 3 To assist development of the semi-empirical thermospheric density model DTM by evaluating possible improvements and changes using a physical model of the coupled thermosphere-ionosphere system

7. SWWT plenary meeting / 28 June 2011 Brussels 1 (database) NB: GRACE-B in 1/2011 and both GRACE this month have accelerometers off

8. SWWT plenary meeting / 28 June 2011 Brussels Decompose all quantities X(t) into slowly-varying (DC) and fluctuating (AC) components:X(t) = X DC (t) + X AC (t) 2 (EUV proxies) DC: using baseline (rms and rank correlations for reconstructed densities) AC: using Output Error model (below: 2D map of correlations as a function of scale)

9. SWWT plenary meeting / 28 June 2011 Brussels

10. Presentations are on-line and can be downloaded: http://ccar.colorado.edu/muri/index.html

11. SWWT plenary meeting / 28 June 2011 Brussels NADIR Focus Areas: NADIR PI Jeff Forbes presented the project to ATMOP in Toulouse on 14 June and the existing collaboration - items I and IV - is expected to be extended to include II, III, V, VI and VII. A joint workshop in Boulder is planned for October.

12. SWWT plenary meeting / 28 June 2011 Brussels Contract signed, project KO in March 2011 GOCE Launch:17 mars 2009 de Plesetsk Mission objectives: High-resolution gravity field of the Earth Mission orbit:Sun-synchronous, dawn/dusk, at 255 km Payload:Gradiometer (accelerometers), GPS Drag control:Ion thrusters commanded in closed-loop GOCE mission extended to 12/2012 (and second extension will be requested); Mission altitude expected to remain at 255 km thanks to weak solar cycle; First density results expected by the end of the year.