Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

О.M. Barkhatova atal. Data and fits *0000 1635 0915 0155 1835 1110 0350 2035 1315 UT 26 D«c«mb«r 27 D*c«mbtr 28 D*c#mb#r 29 D»c#mb»r 30 D«c«mb«r 31 D«c«mb«r Fig. 1. The removal of MOF daily variation: on the top panel points show original MOF data (F) and continuous line is their approximation by Gauss function; on the bottom panel is result (Rez F, MHz) of removal Gauss function values from original MOF values (DMOF). 3. Search of linear correlations and their estimation At the first investigation phase the search o f linear correlations between DMOF on each trace with examined interplanetary space parameters has been executed. At correlation calculation has been entered the time delay from 0 to 300 minutes which allowed to establish time of ionosphere reaction on disturbances o f each parameter. For each oblique sounding trace has been calculated the statistical weight. It allows to carry out a quantitative estimation of influence each of parameters on DMOF taking into account a time delay. The statistical weight represents the relation of day quantity in which high correlation (> 0.5) between DMOF and examined parameters was marked to total quantity of researched days on each trace. Fig. 2 submits the total histogram of statistical weights for each trace. В Bx By Bz N V XL XS Статистический вес Fig. 2. The statistical weights calculated for each of examined parameters for all researched oblique sounding traces. The analysis of the received results for IMF module and components shows that on DMOF on subauroral trace Norilsk - Rostov-on-Don the greater influence have components By and Bz IMF in comparison with other mid­ latitude and low-latitude traces. At mid-latitude traces Inskip - Rostov-on-Don and Irkutsk - Rostov-on-Don the influence of Bx and Bz components is more evident. At low-latitude trace Cyprus - Rostov-on-Don influence of IMF module on DMOF is marked. Solar wind density and velocity have an effect in DMOF on all traces. At Norilsk - Rostov-on-Don trace influence of these parameters is less evident in comparison with other mid-latitude and low- latitude traces. Long-wave X-ray radiation has the greatest influence on DMOF o f low-latitude trace Cyprus - Rostov-on-Don. 4. Nonlinear connections and MOF restoration on examined traces Addition and specification of previous results received on the basis o f linear correlations have been carried out by search of nonlinear connections between interplanetary space parameters and DMOF at each examined trace For 110