Surface Observations of Atmospheric Electrical Parameters At The Low Latitude Site, Tirunelveli (8.7°N, 77.8°E)
The geo-electric potential is known to be produced by thunderstorms and the ionospheric and magnetospheric generators. The high potential difference between the Earth and the ionosphere produces the downward electric field (Ez). The variation of conductivity with respect to altitude gives different electric field at different heights. The experimental field site chosen for the present work is situated at Tirunelveli (8.7oN, 77.8oE). The passive antenna, long wire horizontal antenna and Gerdien condenser are the sensors that are used to measure the fundamental parameters of the global electric circuit (GEC). The passive antenna system measures the vertical potential gradient or electric field (Ez); the horizontal long wire antenna measures the Maxwell current (I) and the Gerdien condenser measures the local conductivity (σ) at 1m height from ground level. The variation of geo-electric potential characterizes the generator and its source. All the above mentioned measuring instruments provide vital information for studying the geo-electric variation. An in-depth understanding of the architecture and functioning of the above said instruments would provide to fetch accurate results. A combined study of the above three parameters would give a meaningful geophysical insights about the GEC. In this paper, we present some results from an analysis carried out using the measured GEC parameters during different electrostatic conditions that are expected to contribute to study of GEC from this low latitude site.
R. Ramar C. Panneerselvam K. Jeeva K. U. Nair C. Selvaraj C. P. Anil Kumar S. Gurubaran
Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Krishnapuram, Tirunelveli 627 011, India
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）