Global Monitoring of Relativistic Electron Precipitation with Balloon Networks: MINIS and Beyond

Details Global Monitoring of Relativistic Electron Precipitation with Balloon Networks: MINIS and Beyond Global Monitoring of Relativistic Electron Precipitation with Balloon Networks: MINIS and Beyond

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm51d..04m&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM51D-04

Physics

2716 Energetic Particles: Precipitating, 2774 Radiation Belts, 2794 Instruments And Techniques

Scientific paper

The MINIS balloon campaign was conducted in January 2005 to obtain the first multi-point balloon measurements of relativistic electron precipitation. A total of six small (~50-90 lbs) payloads, were launched from the South African Antarctica Station (SANAE) and Churchill, Manitoba. Each payload carried a NaI scintillator to measure bremsstrahlung X-rays produced by precipitating electrons, and the southern payloads carried electric and magnetic field instruments. Three MINIS payloads (at L=3.5,4.1,and L~10) simultaneously detected bursts of relativistic precipitation on January 21, 2005 between 1700-2000 UT (1230-1500 MLT). We summarize the MINIS results, focusing on the spatial structure of precipitation during these events. These observations reveal the large spatial extent and complicated spatial structure of precipitation, and demonstrate the importance of simultaneously monitoring precipitation over a wide range of latitudes and local times to obtain accurate estimates of the relativistic electron loss rate. In particular, multiple-balloon observations will be an essential tool for globally monitoring precipitation during upcoming radiation belt missions such as the RBSP mission.

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