Measurement of the wave impedance of low frequency electromagnetic waves in the earth-ionosphere duct
Abstract
The measurement of the electric and magnetic field components of pulse signals radiated by distant lightning discharges, or sferics, has been accomplished in the 1-10 kHz frequency band. The measurement method employed, which was previously employed by Ishaq and Jones (1979) in the lower ELF, required only one recording station, and knowledge of the source discharge's location is obviated. The theoretical basis of the present work is the waveguide mode theory of propagation in the earth-ionosphere duct, which has been described by Wait (1970).
- Publication:
-
2nd International Conference on Antennas and Propagation
- Pub Date:
- 1981
- Bibcode:
- 1981icap.conf..207J
- Keywords:
-
- Electromagnetic Radiation;
- Impedance Measurement;
- Ionospheric Propagation;
- Wave Propagation;
- Electric Fields;
- Extremely Low Frequencies;
- Fourier Transformation;
- Lightning;
- Magnetic Fields;
- Communications and Radar