HR: 16:45h
AN: SM34A-04 [Abstracts]
TI: Energy spectral characteristics of Electron Micro-bursts observed by the Korean STSAT-1
AU: * Lee, J
EM: jjlee@ssl.berkeley.edu
AF: Space Sciences Lab. UC Berkeley, 7 Gauss way, Berkeley, CA 94720
United States
AU: Min, K
EM: kwmin@space.kaist.ac.kr
AF: KAIST, 373-1 Gusung-Dong, Yousung-Gu, Daejeon, 305-701
Korea, Republic of
AU: kim, H
EM: woodcar@space.kaist.ac.kr
AF: KAIST, 373-1 Gusung-Dong, Yousung-Gu, Daejeon, 305-701
Korea, Republic of
AU: Park, J
EM: jhpark@space.kaist.ac.kr
AF: KAIST, 373-1 Gusung-Dong, Yousung-Gu, Daejeon, 305-701
Korea, Republic of
AU: Hwang, J
EM: jahwang@space.kaist.ac.kr
AF: KAIST, 373-1 Gusung-Dong, Yousung-Gu, Daejeon, 305-701
Korea, Republic of
AU: Lee, E
EM: eslee@ssl.berkeley.edu
AF: Space Sciences Lab. UC Berkeley, 7 Gauss way, Berkeley, CA 94720
United States
AU: Parks, G K
EM: parks@ssl.berkeley.edu
AF: Space Sciences Lab. UC Berkeley, 7 Gauss way, Berkeley, CA 94720
United States
AU: McCarthy, M
EM: mccarthy@u.washington.edu
AF: Univ Washington, Box351310, Seattle, WA 98195
United States
AB:
Energy spectra of electrons from 100 eV to 20keV and from 170keV to 340keV have been measured in the outer zone by a
combination of electrostatic analyzers and solid state telescopes aboard the low-altitude (680km), polar-orbiting STSAT-1
(Science and Technology SATellite) satellite. With high accurate attitude control systems of the satellite and high sampling
rate of the instrument, we have clearly identified precipitating electrons responsible for microbursts with durations of less
than 1s. The data show that microburst precipitation occurs with uniform pitch angle distributions, and less particle fluxes
and lower e-folding energy than those of quasi-trapped electrons. These observations support the idea that microbursts may
due to the pitch angle scattering associated with wave-particle interaction in the equatorial region. There is evidence this
mechanism is more effective for lower energy electrons.
DE: 2716 Energetic particles, precipitating
DE: 2720 Energetic particles, trapped
DE: 2731 Magnetosphere--outer
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting