Abstract
THE intense radio emissions from active areas on the Sun have been studied since 1942 on ‘single’ fixed frequencies; but the first ‘spectral’ or sweep frequency observations were not initiated until 1949, when Wild and McCready1 at Sydney commenced observations with equipment sweeping the band 70–130 Mc./s. These observations, which were later2 extended to 40–240 Mc./s., marked a notable advance in solar radio techniques, and greatly simplified the classification of solar radio phenomena.
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References
Wild, J. P., and McCready, L. L., Aust. J. Sci. Res., A, 3, 387 (1950).
Wild, J. P., Murray, J. D., and Rowe, W. C., Aust. J. Phys., 7, 439 (1954).
Maxwell, A., Swarup, G., and Thompson, A. R., Proc. Inst. Rad. Eng. (in the press).
Maxwell, A., Swarup, G., and Stone, P. H. (in preparation).
Wild, J. P., Roberts, J. A., and Murray, J. D., Nature, 173, 532 (1954).
Richardson, R. S., Astrophys. J., 114, 356 (1951).
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MAXWELL, A., SWARUP, G. A New Spectral Characteristic in Solar Radio Emission. Nature 181, 36–38 (1958). https://doi.org/10.1038/181036a0
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DOI: https://doi.org/10.1038/181036a0
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