№ 08 (ЕСБЗТ)

Permanent URI for this collection

http://crust.ust.edu.ua/handle/123456789/4068

Browse

Browsing № 08 (ЕСБЗТ) by Subject "Earth-ionosphere waveguide"

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Numerical Modeling of Multimode Tweek-Atmospherics in the Earth-Ionosphere Waveguide
    (Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Serdyuk, Tatyana N.; Shvets, Аleksandr V.
    EN: Actuality of the work. Information about the coordinates of lightning received in real time is important to assess the risk for different types of transport, power transmission and communication lines, gas and oil pipelines, protection of forests, open cast mining, industrial and port facilities. Accumulated for a long time data on the frequency of occurrence of lightning within the territory covered by the network can serve for geophysical and meteorological research, and for the purposes of ensuring safety in the design of industrial facilities and transport links. The US, a number of Western European countries, Japan, China and South Korea have national lightning detection networks ensuring the accuracy of the location of a few kilometers. This information is provided on a commercial basis. The lightning location network is based on numerous items of registration of electromagnetic radiation, equipped with fairly complicated synchronously operating equipment, and its implementation is technically difficult and expensive procedure. Alternative to the networks for many applications are single station locating systems based on the definition of the azimuth and distance to a source. However, they have much smaller precision of location determination than multi-position systems. Therefore, an actual task is to develop single-position location techniques that can increase the accuracy of determining the coordinates of lightning. The purpose of this paper is to analyze the accuracy of existing methods based on numerical modeling and development a new and improved method of single-site lightning location using ltweek-atmospherics - electromagnetic signals that represent the response of the natural Earth-ionosphere waveguide in the frequency range from 1 to 20 kHz to excitation by lightning discharges. As a result of this work methods of determining the distance to lightning are analyzed and a new method is proposed consisting in compensation of the waveguide dispersion in the signals, thus improving the accuracy of the estimates of distance to lightning in the range 100..3000 km and some ionospheric parameters, especially in the presence of noise.