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Raiko [Tohoku University]

Raiko was a 2U-Cubesat built by the Japanese Wakayama and Tohoku Universities as a precursor to UNIFORM.

RAIKO carried three cameras: a color CMOS camera for taking photos of the ISS after deployment, a color CCD camera for earth observation, and a high-sensitive CCD sensor to be used for star observation and as an attitude sensor.

Additionally, it carried a 50 cm × 50 cm deployable drag sail to increase atmospheric drag at the end of the mission to ensure a earlyer re-entry.

The mission of Raiko was:

  • Taking images of the Earth through a fish-eye lens camera
  • Measuring relative movement when deployed from the ISS through photo shooting
  • Experimental star sensor
  • Orbit descending experiment using membrane deployment
  • Development of a small movable ground station and receiving signals via international cooperation
  • Orbit determination experiment by Doppler frequency measurement of Ku-band beacon radio wave
  • High speed data communication experiment by Ku-band communication equipment

Raiko was launched on board of HTV 3 to the International Space Station, from where it was deployed on 4 October 2012. The last communication with Raiko was on 15 July 2013.

Nation: Japan
Type / Application: Technology
Operator: Wakayama Univiersity and Tohoku University
Contractors: Wakayama Univiersity and Tohoku University
Equipment: Camera
Configuration: CubeSat (2U)
Propulsion: None
Power: Solar cells, 2 deployable fixed solar arrays, batteries
Mass: 2 kg
Orbit: 399 km × 425 km, 51.65
Satellite COSPAR Date LS Launch Vehicle Remarks
Raiko 1998-067CN 21.07.2012 Ta YLP-2 H-2B-304 with HTV 3 (Kounotori 3), SCaN-Testbed, MCE, WE WISH, FITSat 1, F 1, TechEdSat 1

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