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Space Weather in Medium Earth Orbit

Space Weather in Medium Earth Orbit. H.D.R. Evans , K. Ryden, P. Nieminen, E. Daly, P. Buehler, W. Hajdas, A. Zadeh ESWW7, Brugge 15/11/2010. MEO Orbit. 23200km altitude circular orbit 56° inclination Crosses the Trapped Electron belt at L=~ 4.5 Giove-A Operational since end Dec. 2005

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Space Weather in Medium Earth Orbit

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  1. Space Weather in Medium Earth Orbit H.D.R. Evans, K. Ryden, P. Nieminen, E. Daly, P. Buehler, W. Hajdas, A. Zadeh ESWW7, Brugge15/11/2010 ESA UNCLASSIFIED – For Official Use

  2. MEO Orbit 23200km altitude circular orbit 56° inclination Crosses the Trapped Electron belt at L=~ 4.5 Giove-A Operational since end Dec. 2005 Giove-BOperational since May 2008 Integral Galileo Integral (4.5<L<5) ESA UNCLASSIFIED – For Official Use

  3. Instrumentation • Giove-A • MERLIN: 3 SURF Plates RadFETs (3 & 6 mm) Proton > 40 MeV Ion/LET detector • CEDEX LET telescope Experimental Dose rate diodes • Giove-B: SREM Three ORTEC type PIPS diodes, two in coincidence RadFET ESA UNCLASSIFIED – For Official Use

  4. Giove-A Merlin SURF Response K. Ryden (QinetiQ), “Measurements of Internal charging Currents in MEO: 2005-10, SCTC-2010, Albuquerque, NM, USA ESA UNCLASSIFIED – For Official Use

  5. Trapped Electron Belt – GioveA/Merlin K. Ryden (QinetiQ), “Measurements of Internal charging Currents in MEO: 2005-10, SCTC-2010, Albuquerque, NM, USA ESA UNCLASSIFIED – For Official Use

  6. Giove-A/MERLIN Spectral Response K. Ryden (QinetiQ), “Measurements of Internal charging Currents in MEO: 2005-10, SCTC-2010, Albuquerque, NM, USA ESA UNCLASSIFIED – For Official Use

  7. IREM Channels Grey = low response to electrons 15 July 2008 COSPAR 7 ESA UNCLASSIFIED – For Official Use

  8. Trapped Electron Belt – GioveB/SREM ESA UNCLASSIFIED – For Official Use

  9. INTEGRAL/IREM from 4.5<L<5.0 ESA UNCLASSIFIED – For Official Use

  10. Giove-B/SREM – RadFET doses ESA UNCLASSIFIED – For Official Use

  11. Herschel/SREM: Solar Proton Events ESA UNCLASSIFIED – For Official Use

  12. Solar Proton Events ESA UNCLASSIFIED – For Official Use

  13. Conclusions • The trapped electron environment is very dynamic but has been very quiet for much of the Giove-B mission, > ½ the dose has been accumulated in the last 8 Months. • The Electron Belt event on the 6th April was a notably strong event in the 4.5<L<5 range, particularly for the higher energy (>2 MeV) electrons. • Since the April Event, the environment has continued to be active, but at a lower level than seen during the last period of solar maximum • Only a few very small solar proton events have been seen in the last years, and the results from Herschel & Planck show an anisotropy in the distribution. The Sun is starting to increase in activity, but it is still fairly quiet. ESA UNCLASSIFIED – For Official Use

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