HR: 1340h
AN: SH53B-0319    [Abstracts]
TI: Solar Wind Modeling and Data Assimilation: Concept and First Results
AU: * Merka, J
EM: jan.merka@gsfc.nasa.gov
AF: L-3 Communications Government Services Inc., 3750 Centerview Drive, Chantilly, VA 20151 United States
AU: Odstrcil, D
AF: University of Colorado/CIRES & NOAA/SEC, 325 Broadway, Boulder, CO 80305 United States
AU: Szabo, A
AF: NASA Goddard Space Flight Center, Code 696, Greenbelt, MD 20771 United States
AB: Up to five simultaneously operating spacecraft monitored the solar wind in 1998-2000 between the L1 point and Earth (ACE, WIND, IMP 8, Geotail, and Interball-1). However, the current space weather prediction methods do not take advantage of these observations made at multiple points. Rather, a single upstream monitor is selected out of the available spacecraft, effectively assuming a completely uniform solar wind flow. We have initiated a project with an aim to assimilate all solar wind observations into the numerical 3D MHD model ENLIL in order to reconstruct the solar wind profile perpendicular to the Sun-Earth line. We present preliminary results of simplified model runs and discuss the benefits and difficulties of data assimilation in the solar wind.
DE: 7843 Numerical simulation studies
DE: 7894 Instruments and techniques
DE: 2164 Solar wind plasma
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting