HR: 08:00h
AN: SM51D-01    [Abstracts]
TI: Intercomparison of Cold Ion Density Measurements in the Plasmasphere-Magnetosphere
AU: * Fraser, B J
EM: brian.fraser@newcastle.edu.au
AF: CRC for Satellite Systems, School of Mathematical & Physical Sciences, University of Newcastle, Callaghan, NSW 2308 Australia
AU: Singer, H J
EM: hsinger@sec.noaa.gov
AF: NOAA/SEC, 325 Broadway, Boulder, CO 80305 United States
AU: Goldstein, J
EM: jgoldstein@swri.edu
AF: Department of Physics and Astronomy, Rice University, Houston, TX 77001 United States
AU: Gallagher, D L
EM: brian.fraser@newcastle.edu.au
AF: Space Science Department, National Space Science & Technology Center, Huntsville, AL 35805 United States
AU: Thomsen, M
EM: mthomsen@lanl.gov
AF: Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545 United States
AB: Recent studies have shown that the radial plasma density profile in the plasmasphere-plasmapause region may vary considerably depending on the particle species measured and the particular satellite instrument making the measurement. For example the heavy ion relative concentrations of He+ and O+ compared with H+ ions, are not constant with increasing radial distance. Also, some satellites measure electron density, directly or indirectly, while others measure H+ and He+. IMAGE-EUV satellite results have confirmed the existence of plasma plumes in the middle magnetosphere. This paper will consider intercalibration between instruments measuring plasma density in the plasmasphere/magnetosphere and develop diagnostic techniques to compute heavy ion densities in plasma plumes. Using the spectral properties of electromagnetic ion cyclotron (EMIC) waves seen in plasma plumes in conjunction with ion density data and diagnostic techniques it is possible to almost completely describe the plasmasphere and magnetosphere cold/cool plasma composition. Particle data from the LANL geostationary satellites, EUV images from the IMAGE satellite and EMIC wave data from the GOES satellites are used in this study. Results yield ion densities ranging from over H+ = 20 - 100 cm-3 and He+ = 3 - 13 cm-3. The He+ results are compared with computed pseudo-densities of He+ determined from IMAGE-EUV data.
DE: 2730 Magnetosphere: inner
DE: 2740 Magnetospheric configuration and dynamics
DE: 2768 Plasmasphere
DE: 2772 Plasma waves and instabilities (2471)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005