2024-03-29T15:34:42Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00019811
2023-01-26T05:12:57Z
879:1183:1640:1730
ELEVEN-YEAR VARIATION OF THE SPECTRUM OF SOLAR RADIO EMISSION ON THE MICROWAVE REGION
TANAKA, Haruo
58008
1964-03-25
Daily values of flux density a t four frequencies on microwave region observed at Toyokawa for more than the half of a complete solar cycle were reviewed and some corrections were made for 9400 and 2000 Mc/s. Basic components were estimated with the aid of interferometric observations as well as by statistics. It was found that the eleven-year change of the basic components amounts to 3. 0, 1.56 and 1.13 times the quiet sun levels for 1000, 2000, 3750 and 9400 Mc/s respectively. The spectrum of the slowly varying component changes appreciably during the solar cycle. The slowly varying components at 3750 and 2800 Mc/s are remarkably parallel in spite of an appreciable difference in the variation of basic components. The slowly varying component at 9400 Mc/s is relatively strong at the slope of the solar cycle. The spectrum of slowly varying component seems to be connected with a great burst following proton events. The slowly varying component at 1000 Mc/s is relatively small at the solar maximum, the effect of the sunspot seeming to be masked by the increased electron density in the corona.
departmental bulletin paper
The Research Institute of Atmospherics, Nagoya University
1964-03-25
Proceedings of the Research Institute of Atmospherics, Nagoya University
11
41
56
http://hdl.handle.net/2237/21864
0077-264X
eng