UHF Radio Telescope Array

UHF Radio Telescope at Fuji Station

The UHF radiotelescope array is a core facility in our reseach activities to explore various misteries in the solar wind physics using the interplanetary scintillation (IPS) method. This system consists of four large radiotelescope, which are located at Toyokawa, Fuji, Sugadaira, and Kiso. The observing frequency is 327 MHz. Multi-station IPS measurements have been carried out with this system on daily basis to determine the solar wind velocity and scintillation level. This system is also used for observations of radio waves from Jupiter and pulsars under the inter-university collaborative reseach program.

• Photos of ISEE UHF Radio Telescopes

  • Solar Wind Imaging Facility Telescope, Toyokawa (SWIFT)
  • Fuji IPS Telescope (FIT)
  • Kiso IPS Telescope (KIT)
  • Today's pictures
  • More pics

• Location of Observation Sites

  • Geographic Locations of Observation Sites

  	Longitude	Latitude	Altitude
  Toyokawa Station	137 deg.E 22'09"	34 deg.N 50'05"	16 m
  Fuji Station	138 deg.E 36'42"	35 deg.N 25'36"	1020 m
  Kiso Station	137 deg.E 37'49"	35 deg.N 47'34"	1110 m

• Specifications

  Type:

  Asymmetric Cylindrical Parabolic Reflector Antenna

  Frequency:

  327MHz

  Physical Aperture:

  100m E-W, 20m N-S (Fuji, Sugadaira)
  74m E-W, 27m N-S (Kiso)
  20mX2 E-W, 108m N-S (Toyokawa)

  Effective Aperture:

  	A_eff
  Toyokawa: SWIFT	1970 m^2
  Fuji: FIT	1500 m^2
  Kiso: KIT	1409 m^2

  Polarization:

  Linear (Horizontal)

  Beam Steerable Range:

  +/- 30 deg. from the meridian transit, 65 deg.S to 20 deg.N (Fuji), 60 deg.S to 20 deg.N (Kiso) from the zenith

  60 deg.S to 30 deg.N from the zenith (Toyokawa)
  Note the beam is fixed in the merdian plane.

• Receiver

  System Temperature:

  	T_sys
  Toyokawa: SWIFT	146 K
  Fuji: FIT	146 K
  Kiso: KIT	146 K

  Frequency:

  327 MHz (+/- 5MHz max.)

• References

  1. Kojima et al.,Proc. Res. Inst. Atmos., Nagoya Univ., 29, 61, 1982.
  2. Asai et al., J. Geomag. Geoelectr., 47, 1107, 1995.
  3. Asai et al., Electronics and Communications in Japan, 79, 11, 1996.
  4. Tokumaru et al., Radio Sci., 46, RS0F02, 2011.
  5. Tokumaru Proceedings of the Japan Academy, Series B, 89, 2, 67-79, 2013.

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