Abstract
MEASUREMENTS of total electron content (TEC) using the Faraday polarisation–rotation and dispersive-group-delay techniques were carried out at Fort Monmouth, New Jersey1,2 (40.18°N, 74.06°W) using v.h.f. and u.h.f. beacon signals emitted by the satellite ATS–6. A comparison of TEC values obtained by both these techniques yields the total electron content of the plasmasphere. During the severe magnetic storms of September 15–16 and September 18–19, 1974, rapid increases with sudden onsets were observed in TEC as well as in plasmaspheric content, NP. These increases were followed by long periods of low values of TEC and NP.
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References
Soicher, H., Nature, 253, 252 (1975).
Soicher, H., NATO AGARD EPP Conference Proceedings on Radio Systems and the Ionosphere, Athens, Greece, May 26–30, 1975 (in the press).
Mendillo, M., Papagiannis, M. D., and Klobuchar, J. A., J. geophys. Res., 77, 25,4891 (1972).
King, G. A. M., J. atmos. terr. Phys., 33, 1223 (1971).
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SOICHER, H. Response of electrons in ionosphere and plasmasphere to magnetic storms. Nature 259, 33–35 (1976). https://doi.org/10.1038/259033a0
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DOI: https://doi.org/10.1038/259033a0
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