Professor Umran Inan

Winter 2000-2001

Date: Wednesday, January 17, 2001
Time: 4:15-5:30 PM; Refreshments at 4:00 PM

Recent Experiments on the Precipitation of Energetic Ions and Electrons into the Atmosphere

Prof. Martin Walt
STAR Lab Stanford University


The Global Geospace Science (GGS) mission is designed to study the injection of solar and atmospheric ions and electrons into the magnetosphere, the transfer of these particles through the magnetosphere and the eventual deposition of energy into the Earth's atmosphere. The strategy is to place a number of spacecraft at critical locations in the magnetosphere and perform simultaneous measurements of all particle and field variables. After numerous programmatic delays this configuration of spacecraft is in position, and has been recording data since about 1996. The principal GGS satellite for particle precipitation studies is POLAR, which has a high inclination, high eccentricity orbit designed for long dwell times over the north pole. Some of the unique instruments on POLAR will be described and recent results on particle precipitation into the atmosphere will be presented