STE Lab. UHF Radio Telescope

UHF Radio Telescope at Fuji Station

The STE Lab. UHF Radio Telescope is a core facility in our reseach activities to explore various misteries in the solar wind physics. This system consists of four large antennas, which are located at Toyokawa, Fuji, Sugadaira, and Kiso. The interplanetary scintillation (IPS) measurements have been carried out with this system on daily basis to derive the solar wind velocity. The system has been also used for observations of Jovian decimetric radiation, and pulsar surveys.

• Location of Observation Sites

  
  
  • Map 1 (Baseline Geometry)
  • Map 2 (Geographic Locations)
  • Clickable Map
  • Today's Picture of STEL IPS Antennas

  	Longitude	Latitude	Altitude
  Fuji Station	138 deg.E 36'42"	35 deg.N 25'36"	1020 m
  Sugadaira Station	138 deg.E 19'16"	36 deg.N 31'12"	1280 m
  Toyokawa Station	137 deg.E 22'09"	34 deg.N 50'05"	16 m
  Kiso Station	137 deg.E 37'49"	35 deg.N 47'34"	1110 m

• Antenna

  Type:

  Cylindrical Parabolic Reflector Antenna

  Frequency:

  327MHz

  Physical Aperture:

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

  Effective Aperture:

  	A_eff
  Fuji Station	1500 m^2
  Sugadaira Station	1100 m^2
  Toyokawa Station	1013 m^2
  Kiso Station	1405 m^2

  Polarization:

  Linear (Horizontal)

  Sky Coverage:

  +/- 30 deg. from meridian transit, 25 deg.S to 40 deg.N in declination

• Receiver

  System Temperature:

  	T_sys
  Fuji Station	151 K
  Sugadaira Station	229 K
  Toyokawa Station	334 K
  Kiso Station	219 K

  Bandwidth:

  10MHz max.

  Integration Time:

  100ms

  Block Diagram (Fuji station):

• 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.

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