Observations of type III burst profiles at 18, 22, 26 and 36 MHz, by Barrow and Achong (1975), are used to calculate the form of the exciter function. The burst profile is treated as the convolution of an exciter function and an exponential decay function. The average form of the exciter profile is
Solar type III burst profiles at decametre-wave frequencies
โ Scribed by C. H. Barrow; A. Achong
- Publisher
- Springer
- Year
- 1975
- Tongue
- English
- Weight
- 303 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
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 al~alyzed 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 -a for centre frequencies of 20, 22, and 31 MHz, respectively. The decay timeconstant appears to bear approximately the same linear relationship to the exciter function duration at each of the four frequencies studied.
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