CORRECTION OF THE AURORAL ELECTROJET INDICES ON BAZE OF THE 
HIGH LATITUDE GEOMAGNETIC VARIATION MODEL

V.A. Popov, A.E. Levitin (IZMIRAN, Troitsk, Russia)

The auroral electrojet indices (AE, AL, AU) are widely used as a measure of 
geomagnetic activity at high latitudes to estimate the magnetospheric energy 
input and the entire magnetosphere energy budget. But due to electrojets 
spatial shift AE indices depend on AE stations location in different UT moments 
(UT variation) and level of geomagnetic activity (Dst variation) as well.

We suggest to correct AE (AL, AU) indices for different UT moments, season 
of year (summer, winter, equinox), different interplanetary magnetic conditions 
and Dst variation based on the IZMIRAN's large-scale high latitude variations 
model (IZMEM) and show the way to construct the correction coefficients for 
different sets of the AE stations i.e. AE(9), AE(11) to compile the 
homogeneous set of indices for 1966-2000 years. The correction improves indices 
correlation with the solar wind parameters. [This paper has been supported 
by the Russian Foundation for Fundamental research, grant 99-05-64296].