HR: 0830h
AN: SM41C-0579    [PDF]
TI: The feasibility of measuring electric and magnetic field parameters at geostationary orbit using LANL satellites
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: Los Alamos National Laboratory, NIS-1, MS D466, Los Alamos, NM 87545 United States
AU: * Jorgensen, A M
EM: ajorg@lanl.gov
AF: Los Alamos National Laboratory, NIS-4, MS D448, Los Alamos, NM 87545 United States
AB: In this paper we investigate the feasibility of deriving large-scale electric and magnetic fields at geostationary orbit by comparing particle flux time series between pairs of LANL geostationary satellites. In the Earth's magnetosphere particle motions can be described by parameterized drift equations. By measuring the particle drift velocities at different energies and pitch-angles, we can in some situations fit for these parameters and thus have a description of the large-scale fields. The drift velocities are derived by measuring the time-offset between time series measured at different satellites. There are several complications: First and most serious, the mere fact that time series are correlated between satellites does not guarantee that the two satellites are measuring the same population. And second, the actual energy/pitch-angle bins are sufficiently wide that an optimal fit cannot be obtained without modeling the dispersion within the bins. We will present the results of the dispersion calculations, match-up of time series and fit to large-scale parameters.
DE: 2411 Electric fields (2712)
DE: 2730 Magnetosphere--inner
DE: 2740 Magnetospheric configuration and dynamics
DE: 2760 Plasma convection
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting