Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-26T03:54:38.335Z Has data issue: false hasContentIssue false
  • English
  • Français

68. Polarization of solar radio bursts

Published online by Cambridge University Press:  14 August 2015

T. Hatanaka
T. Hatanaka*
Affiliation:
Tokyo Astronomical Observatory, Mitaka, Tokyo, Japan

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The polarization observation of solar radio emission at 200 Mc./s. was started in December 1954 at the Tokyo Astronomical Observatory with a new type of radio polarimeter[1, 2]. With a pair of crossed dipoles at the focus of a 10 metre paraboloid of equatorial mounting, it gives almost simultaneously six components of polarization, two circular and four linear, on a time-sharing basis by using electronic switching. Fig. 1 shows the block diagram of the circuit and the combination of modulators and demodulators. 6AS6 pentodes are used as the time modulators. The duration of each gate pulse is 1/1600 sec. and one set of observations is obtained in 1/200 sec. One of the principal features of the present scheme is to use a common receiving system for all the components in order to avoid inevitable errors due to differences or changes in the gain and in the central frequencies of different receivers. A new type of square-law detector is employed in the present system [3]. It has rapid response time and excellent stability.

Type
Part V: The Active Sun
Information
Symposium - International Astronomical Union , Volume 4: Radio Astronomy , 1957 , pp. 358 - 362
Copyright
Copyright © Cambridge University Press 1957 

References

1. Hatanaka, T., Suzuki, S. and Tsuchiya, A. Proc. Japan Academy , 31, 81, 1955.CrossRefGoogle Scholar
2. Hatanaka, T., Suzuki, S. and Tsuchiya, A. Publ. Astr. Soc. Japan , 7, 114, 1955.Google Scholar
3. Suzuki, S. Publ. Astr. Soc. Japan , 7, 121, 1955.Google Scholar
4. Hatanaka, T. Research Report EE-179, Cornell University, 1953.Google Scholar
5. Hatanaka, T. Research Report EE-257, Cornell University, 1955. Also Hatanaka, T. Publ. Astr. Soc. Japan, 8, 73, 1956.Google Scholar