Abstract
MEASUREMENTS of the total electron content of the ionosphere by observation of the differential Faraday fading of lunar radio echoes on two closely spaced frequencies were first made by Evans1. Use of a transit aerial limited observations to 1 hr. per day and permitted only the mean diurnal variation of the total electron content (n t) to be obtained. Similar measurements are now being made with equipment mounted on the 250-ft. Jodrell Bank radio telescope; this allows up to 16 hr. continuous observation a day and gives reliable information on short-term and day-to-day variations in n t. The frequencies used are 100.60 and 99.40 Mc./s.
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References
Evans, J. V., J. Atmos. Terr. Phys., 11, 259 (1957).
Hame, T. G., and Stuart, W. D., Proc. Inst. Rad. Eng., 48, No. 10, 1786 (1960).
Ross, W. J., J. Geophys. Res., 65, 2607 (1960).
Garriott, O. K., J. Geophys. Res., 65, 1151 (1960).
Maeda, K. I., and Sato, T., Proc. Inst. Rod. Eng., 47, 232 (1959).
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TAYLOR, G. The Total Electron Content of the Ionosphere during the Magnetic Disturbance of November 12–13, 1960. Nature 189, 740–741 (1961). https://doi.org/10.1038/189740a0
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DOI: https://doi.org/10.1038/189740a0
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