Nobeyama Radio Polarimeters

English / Japanese

Nobeyama Radio Polarimeters (NoRP) are observing the Sun with multiple frequencies in the microwave range. It is capable to obtain the total coming flux and the circular-polarization degree.

The system of 17 GHz is routinely working since 1978, that of 35 GHz since 1983, and that of 80 GHz since 1984. The systems of 1, 2, 3.75, and 9.4 GHz were working at Toyokawa observatory of the Research Institute of Atmospherics, Nagoya University since around 1979. They were moved to Nobeyama in Apr 1994 and has been working since then.

Observing Frequencies	1, 2, 3.75, 9.4, 17, 35, 80 GHz
Field of View	Full Sun
Spatial Resolution	None (Observing the flux from the full Sun disk)
Temporal Resolution	0.1 sec

NoRP before the unification with Toyokawa Polarimeters

References

Shimojo and Iwai "Over seven decades of solar microwave data obtained with Toyokawa and Nobeyama Radio Polarimeters", GDJ, 10, 114-129 (2023) [GDJ]
Nakajima et al. "The Radiometer and Polarimeters at 80, 35, and 17 GHz for Solar Observations at Nobeyama", PASJ, 37, 163 (1985) [ADS]
Torii et al. "Full-Automatic Radiopolarimeters for Solar Patrol at Microwave Frequencies", Proc. of the Res. Inst. of Atmospherics, Nagoya Univ., 26, 129 (1979) [ADS]
Shibasaki et al. "Solar Radio Data Acquisition and Communication System (SORDACS) of Toyokawa Observatory", Proc. of the Res. Inst. of Atmospherics, Nagoya Univ., 26, 117 (1979) [ADS]
Tanaka, "Toyokawa Observatory", Solar Physics, 1, 2, 295 (1967) [ADS]
Tsuchiya and Nagase "Atmospheric Absorption in Microwave Solar Observation and Solar Flux Measurement at 17 Gc/s", PASJ, 17, 86 (1965) [ADS]
Tanaka and Kakinuma. "EQUIPMENT FOR THE OBSERVATION OF SOLAR RADIO EMISSION AT 9400, 3750, 2000 AND 1000 Mc/s", Proc. of the Res. Inst. of Atmospherics, Nagoya Univ., 4, 60 (1957) [NAGOYA Repository]
Tanaka et al. "EQUIPMENT FOR THE OBSERVATION OF SOLAR NOISE AT 3,750 MC", Proc. of the Res. Inst. of Atmospherics, Nagoya Univ., 1, 71 (1953) [NAGOYA Repository]

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