L.V. Grunskaya, V.V. Isakevich, A.A. Zakirov, D.V. Rubay, D.V. Isakevich, A.S. Batin

There has been carried out a system of multichannel synchronic monitoring of the electrical and geomagnetic fields at the spaced apart stations: VSU physical experimental ground. All of those stations are provided with an electrical field sensor, developed at VSU. Bases of experimental data are being formed according to the spaced apart stations. For reliable physical interpretation of the results there was additionally used a wide system of the ground geophysical data according to the electrical field of the surface boundary layer received at the station of the hydrometeorological service (Dushety, Verchnyaya Dubrova, Voyeikovo). The spectrum interconnection handling of geomagnetic data of the spaced stations was carried out with the help of the program-quadrature correlation receiver, which showed the same results with theoretical model of interconnection between moon tides and geomagnetic field. The objective is solving using data of large time periods (years of continuous monitoring) because we are working with infralow frequency range 10-5?10-7 Hz with resolution capability 10-7?10-9 Hz. The results of correlation and spectrum handling of geomagnetic data of spaced stations with the help of program-quadrature correlation receiver gave the following: for solar tides (2-7) nT, for moon tides frequencies (0,004-0,4) nT. Signal/noise ratio for solar tides frequencies is around 5-8, and for moon tides - 2-3. And these results shows that detection of moon gravitational tides in geomagnetic field with the help of spectrum analysis. There has been developed a program - analytical system to investigate signal structures in spectral and time ranges caused by geophysical processes. The main aim in developing such a system is to investigate signal structures in spectral and time ranges caused by geophysical and astrophysical processes in the electrical and magnetic field of the atmosphere surface boundary layer, and to investigate under noise periodical processes of geophysical and astrophysical structure. The novelty of the developed method is that initial time series itself is not subjected to spectral analysis but its eigen vectors are subjected to its and that allows to use spectral analysis to save separate non - correlated time series components connected with the definite physical processes. The ratio of the amplitude spectrum maximum value at the chosen eigen vectors to its mean value for electrical and geomagnetic fields while extracting periods corresponding to solar and moon tides is average 267 to 179. Using the method of spectral analysis of eigen vectors in long - term time series of the electrical field vertical component showed its efficiency for exposing periodical components with a energetic contribution up to 10-4. Using the method of spectral analysis of eigen vectors in long - time series of the electrical field vertical component showed its efficiency for exposing periodical components, connected with moon tides.