Title :
Radiation-belt and transient solar-magnetospheric effects on Hipparcos radiation background
Author :
Daly, E.J. ; Leeuwen, F.V. ; Evans, H.D.R. ; Perryman, M.A.C.
Author_Institution :
European Space Agency, Eur. Space Res. & Technol. Centre, Noordwijk, Netherlands
Abstract :
The Hipparcos astrometry satellite operated in a near-geostationary transfer orbit between August 1989 and August 1993. Its telescopes were sensitive to background signals induced by energetic electrons and protons, and by bremsstrahlung. The observations yielded a long-term data-set which strongly reflects the structure of the radiation belts, their dynamics and the effects of solar particle events. Investigation of these data includes qualitative comparisons with GOES and CRRES data.<>
Keywords :
artificial satellites; bremsstrahlung; cosmic ray electrons; cosmic ray interactions; cosmic ray protons; magnetosphere; proton effects; radiation belts; solar cosmic ray particles; AD 1989 08 to 1993 08; CRRES data; GOES data; Hipparcos astrometry satellite; background signals; bremsstrahlung; energetic electrons; energetic protons; magnetosphere; near-geostationary transfer orbit; radiation background; radiation belts; solar particle events; transient solar-magnetospheric effects; Belts; Cathodes; Electrons; Extraterrestrial measurements; Fluorescence; Optical devices; Protons; Refractive index; Satellites; Telescopes;
Journal_Title :
Nuclear Science, IEEE Transactions on
