HR: 1330h
AN: SH42A-0498    [PDF]
TI: Study of the Pre-Reversal Enhancement at the Jicamarca Radio Observatory using the ASPEN-TIMEGCM
AU: * Makela, J J
EM: jmakela@ssd5.nrl.navy.mil
AF: E.O. Hulburt Center for Space Reseach Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375 United States
AU: Crowley, G
AF: Southwest Research Institute, 6220 Culebra Rd, San Antonio, TX 78228 United States
AU: Kelley, M C
AF: Electrical and Computer Engineering Cornell University, 318 Rhodes Hall, Ithaca, NY 14853 United States
AU: Nicolls, M J
AF: Electrical and Computer Engineering Cornell University, 318 Rhodes Hall, Ithaca, NY 14853 United States
AU: Kudeki, E
AF: Electrial and Computer Engineering Uiniversity of Illinois, 1406 W. Green St., Urbana, IL 61801 United States
AU: Chau, J L
AF: Radio Observatorio de Jicamarca Instituto Geofisico del Peru, Aparatado 13-0207, Lima, 13 Peru
AB: The Advanced Space Environment Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model (ASPEN-TIMEGCM) has been run to simulate the global ionosphere for three days in April 2002 and five days in June 2002. The April period was a time of quiet geomagnetic activity preceding an intense storm while the June period was a time of quiet to moderate activity. These periods were chosen as data from the Jicamarca Radio Observatory were available. Here, we concentrate on the eastward electric field (vertical ion drift) at the location of Jicamarca, as this is one of the most important parameters in setting up the low-latitude ionosphere. We find that the model properly captures the variations of the eastward equatorial electric field. In particular, it correctly models the timing and magnitude of the pre-reversal enhancement, both on nights when it is present and those when it is not.
DE: 2411 Electric fields (2712)
DE: 2415 Equatorial ionosphere
DE: 2447 Modeling and forecasting
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting