Investigation of propagation and excitation of arbitrarily shaped electromagnetic signals detected by satellites and ground stations

The investigation of the Earth’s upper atmosphere by ELF-VLF electromagnetic signals can answer generally important problems relating to electromagnetic wave propagation and specific phenomena (e.g. connection between seismic activity and the state of the upper atmosphere).

For this purpose it is very important to improve new theoretical propagation–models of high accuracy and the comparative analysis of the computed results with data measured by satellites and terrestrial stations. This is the task of the present research.

These analyses can yield generally valid results applicable in connection with electromagnetic wave propagation, furthermore these can discover the relation between the seismic events and some phenomena of the atmosphere.

By the advanced development of the fundamentally new, full-wave propagation-model of non-monochromatic signals is possible to obtain the general description of arbitrarily strong spatial inhomogeneity in the model, and to determine a generally valid solution.

A further task is to analyse the theoretical background of the connection between the seismic activity and the measured and calculated VLF-signals by the comparison of the model-calculations to the measured terrestrial and satellite (Compass-2, Predvestnik) data-base. It is interesting to investigate the occasional application of these results in the interplanetary VLF-plasma research.