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International Astronomical Union Colloquium | 1993

Solar Activity Observed with the New Nobeyama Radioheliograph

Shinzo Enome; Hiroshi Nakajima; Kiyoto Shibasaki; Masanori Nishio; Toshiaki Takano; Yoichiro Hanaoka; Chikayoshi Torii; H. Sekiguchi; Susumu Kawashima; Takeshi Bushimata; Noriyuki Shinohara; Yoshihisa Irimajiri; Hideki Koshiishi; Takeo Kosugi; Yasuhiko Shiomi; M. Sawa; K. Kai

The new Nobeyama Radioheliograph was completed in March 1992 after two years of construction. It is a T-shaped array operating as a multiple spacing grating-type radio interferometer at 17 GHz and is dedicated to full disk solar observations. Routine observations began in late June, 1992, after three months of system integration, fine tuning, and test observations. During the course of test observations it was shown that major items of the system performance exceeded the designed values, and that the image quality or the dynamic range of the images is better than the designed value. In the three months of routine observations two X-class flares, several M-class flares and a number of small flares were observed. In this report we present a summary of initial observational results and preliminary comparisons with YOHKOH HXT and SXT observations.


Proceedings of the IEEE | 1994

The Nobeyama radioheliograph

H. Nakajima; M. Nishio; S. Enome; Kiyoto Shibasaki; Toshiaki Takano; Y. Hanaoka; Chikayoshi Torii; H. Sekiguchi; Takeshi Bushimata; Susumu Kawashima; Noriyuki Shinohara; Yoshihisa Irimajiri; Hideki Koshiishi; Takeo Kosugi; Yasuhiko Shiomi; M. Sawa; K. Kai


Publications of the Astronomical Society of Japan | 1985

The radiometer and polarimeters at 80, 35, and 17 GHz for solar observations at Nobeyama

Hiroshi Nakajima; H. Sekiguchi; M. Sawa; K. Kai; Susumu Kawashima; Takeo Kosugi; N. Shibuya; Noriyuki Shinohara; Yasuhiko Shiomi


Publications of the Astronomical Society of Japan | 1994

Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha)

Yoichiro Hanaoka; Hiroki Kurokawa; Shinzo Enome; Hiroshi Nakajima; Kiyoto Shibasaki; Masanori Nishio; Toshiaki Takano; Chikayoshi Torii; H. Sekiguchi; Susumu Kawashima; Takeshi Bushimata; Noriyuki Shinohara; Yoshihisa Irimajiri; Hideki Koshiishi; Yasuhiko Shiomi; Yoshihiro Nakai; Y. Funakoshi; Reizaburo Kitai; K. Ishiura; Goro Kimura


Archive | 1997

An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system

Toshiaki Takano; Hiroshi Nakajima; Shinzo Enome; Kiyoto Shibasaki; Masanori Nishio; Yoichiro Hanaoka; Yasuhiko Shiomi; H. Sekiguchi; Susumu Kawashima; Takeshi Bushimata; Noriyuki Shinohara; Chikayoshi Torii; K. Fujiki; Yoshihisa Irimajiri


Publications of the Astronomical Society of Japan | 1994

A purely polarized S-component at 17 GHz

Kiyoto Shibasaki; Shinzo Enome; Hiroshi Nakajima; Masanori Nishio; Toshiaki Takano; Yoichiro Hanaoka; Chikayoshi Torii; H. Sekiguchi; Susumu Kawashima; Takeshi Bushimata; Noriyuki Shinohara; Hideki Koshiishi; Yasuhiko Shiomi; Yoshihisa Irimajiri; K. D. Leka; Richard C. Canfield


Publications of the Astronomical Society of Japan | 1994

Behavior of accelerated electrons in a small impulsive solar flare on 1992 August 12

Toshiaki Takano; Shinzo Enome; Hiroshi Nakajima; Kiyoto Shibasaki; Masanori Nishio; Yoichiro Hanaoka; Chikayoshi Torii; H. Sekiguchi; Takeshi Bushimata; Susumu Kawashima; Noriyuki Shinohara; Yoshihisa Irimajiri; Hideki Koshiishi; Takeo Kosugi; Yasuhiko Shiomi; Takashi Sakurai; Kiyoshi Ichimoto


Publications of the Astronomical Society of Japan | 1994

Evaluation of the imaging performance of the Nobeyama Radioheliograph

Hideki Koshiishi; Shinzo Enome; Hiroshi Nakajima; Kiyoto Shibasaki; Masanori Nishio; Toshiaki Takano; Yoichiro Hanaoka; Chikayoshi Torii; H. Sekiguchi; Susumu Kawashima; Takeshi Bushimata; Noriyuki Shinohara; Yoshihisa Irimajiri; Yasuhiko Shiomi


Publications of the Astronomical Society of Japan | 1994

Radio imaging observations of the evolution of thermal and nonthermal sources during a gradual solar burst

Masanori Nishio; Hiroshi Nakajima; Shinzo Enome; Kiyoto Shibasaki; Toshiaki Takano; Yoichiro Hanaoka; Chikayoshi Torii; H. Sekiguchi; Takeshi Bushimata; Susumu Kawashima; Noriyuki Shinohara; Yoshihisa Irimajiri; Yong-Seok Choi; Hideki Koshiishi; Yasuhiko Shiomi; Thomas R. Metcalf; Richard C. Canfield


Publications of the Astronomical Society of Japan | 1994

Alignment of radio, soft X-ray, hard X-ray images of sources in impulsive and gradual phases of the flare of 1992 August 17-18

Shinzo Enome; Hiroshi Nakajima; Kiyoto Shibasaki; Masanori Nishio; Toshiaki Takano; Yoichiro Hanaoka; Chikayoshi Torii; Yasuhiko Shiomi; H. Sekiguchi; Takeshi Bushimata; Susumu Kawashima; Noriyuki Shinohara; Yoshihisa Irimajiri; Hideki Koshiishi; Yong-Seok Choi; J. I. Sakai; Masaaki Takahashi; Tatsuo Takakura; Taro Sakao; Takeo Kosugi

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Hideki Koshiishi

Japan Aerospace Exploration Agency

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Yoichiro Hanaoka

Graduate University for Advanced Studies

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