HR: 0830h
AN: SA21B-0081    [PDF]
TI: On the Effect of Modified High-Latitude Drivers (Convection and Precipitation) on the Ionospheric Plasma Density Distribution
AU: * Bekerat, H
EM: hamed@gaim.cass.usu.edu
AF: Utah State University, Center for Atmospheric and Space Sciences, 4405 Old Main Hill, Logan, UT 84322-4405 United States
AU: Schunk, R W
EM: schunk@cc.usu.edu
AF: Utah State University, Center for Atmospheric and Space Sciences, 4405 Old Main Hill, Logan, UT 84322-4405 United States
AU: Scherliess, L
EM: ludger@gaim.cass.usu.edu
AF: Utah State University, Center for Atmospheric and Space Sciences, 4405 Old Main Hill, Logan, UT 84322-4405 United States
AU: Eccles, V
EM: vince.eccles@spacenv.com
AF: Space Environment Corporation, 221A Spring Creek Parkway, Providence, UT 84332 United States
AB: We present our work in developing and testing the high-latitude drivers for Utah State University (USU) GAIM (Global Assimilation Of Ionospheric Measurements). GAIM uses a physics-based model and a Kalman filter as a basis for assimilating a diverse set of real-time (or near real-time) measurements. Particle precipitation and convection patterns are the high-latitude drivers for GAIM. The Weimer convection model [$\it{Weimer, JGR, 2001}$] and Hardy precipitation model [$\it{Hardy et al, JGR, 1985}$] represent climatological patterns for these drivers. On any given day, the climatological drivers differ significantly from the real-time drivers. For ionospheric specifications and forecast, real-time high-latitude drivers are needed to get a more realistic prediction for the ionosphere. New modified high-latitude divers are developed by using real-time in situ DMSP satellite measurements. To investigate the effect of the modified drivers on the ionosphere, the climatological and modified high-latitude drivers are used to drive the Ionosphere Forecast Model (IFM) and the calculated plasma densities are then compared to the in situ densities measured along the DMSP orbits.
DE: 2447 Modeling and forecasting
DE: 2463 Plasma convection
DE: 2467 Plasma temperature and density
DE: 2475 Polar cap ionosphere
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting