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Solar type III burst profiles at decametre-wave frequencies

I: Observations

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Abstract

Solar type III bursts have been observed at fixed frequencies of 18, 22, 26 and 36 MHz during the period 1970–1974. 103 profiles have been analyzed in the manner introduced by Aubier and Boischot (1972) whose results are generally confirmed. Average values for the exciter function duration were found for each frequency to be respectively 16.6, 14.7, 10.2 and 8.1 s, and for the decay time constant 3.6, 3.1, 2.3 and 1.8 s. Average peak-to-peak frequency drifts were found to be - 1.9,- 2.1, and - 3.5 MHz s−1 for centre frequencies of 20, 22, and 31 MHz, respectively. The decay time-constant appears to bear approximately the same linear relationship to the exciter function duration at each of the four frequencies studied.

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Barrow, C.H., Achong, A. Solar type III burst profiles at decametre-wave frequencies. Sol Phys 45, 459–465 (1975). https://doi.org/10.1007/BF00158462

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  • DOI: https://doi.org/10.1007/BF00158462

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