HR: 11:50h
AN: SA32A-06    [Abstracts]
TI: Photoelectron Conic Distributions Observed by FAST
AU: * Peterson, W
EM: Bill.Peterson@lasp.colorado.edu
AF: LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Andersson, L
EM: andersson@lasp.colorado.edu
AF: LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Su, Y
EM: ysu@lasp.colorado.edu
AF: LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AB: Observations from FAST of escaping photoelectrons at altitudes of 2000 to 3000 km and at solar zenith angles greater than ~100 degrees show conic distributions. I.e. distributions of upflowing photoelectrons with angular distributions peaked near the upward directed source cone created by the fall off in magnetic field intensity. We describe these observations and suggest how these distributions might be formed. We also discuss how these observations might be used to infer the density distribution above the ionosphere of Earth and other planets.
DE: 0358 Thermosphere--energy deposition
DE: 2494 Instruments and techniques
DE: 2704 Auroral phenomena (2407)
DE: 7538 Solar irradiance
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly