HR: 1340h
AN: SA23A-0381    [Abstracts]
TI: Power Spectra and Geophysical Variations in the Auroral Hemispheric Power
AU: * Emery, B A
EM: emery@ucar.edu
AF: HAO/NCAR, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Evans, D S
EM: david.s.evans@noaa.gov
AF: Space Environment Center, 325 Broadway, Boulder, CO 80305 United States
AU: Rich, F J
EM: frederick.rich@hanscom.af.mil
AF: AFRL/VSBP, 29 Randolph Road, Hanscom AFB, MA 01731-3010 United States
AB: Two and a half solar cycles of low energy auroral electron and total hemispheric power indices from 21 NOAA and DMSP satellites were intercalibrated for each hemisphere after addressing contamination and degradation issues. The adjustments ranged within a factor of two. The SEM-2 NOAA satellites were also intercalibrated to provide estimates of the low energy ($<$ 20 keV) auroral ion hemispheric power over half a solar cycle. The winter hemispheric electron power exceeded the summer by 5% to 25% between solar minimum and maximum, while the low energy ion hemispheric power was larger in the summer hemisphere. Hourly and daily median and average composite indices were created. The adjusted and composite indices were compared with various geophysical indices. Spectral power analyses were made to find the long and short time periodicities of the parameters. The best cross-correlations were found to be with the Kp geomagnetic index for the electron hemispheric power and with the Ap geomagnetic index for the ion hemispheric power.
UR: http://cedarweb.hao.ucar.edu/instruments/ehp.html
DE: 2162 Solar cycle variations (7536)
DE: 2455 Particle precipitation
DE: 0310 Airglow and aurora
DE: 0358 Thermosphere--energy deposition
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting