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HSU-SAT 1 (Happy Science University Satellite 1) is a educational CubeSat (1U) built by the Happy Science University in Chosei, Chiba, an organization of the Happy Science cult.

The objectives of the satellite are:

  • A technology demonstration of Electrical Power Supply On Board Computer and other bus components.
  • HSU-SAT1 performs three-axis attitude control by combining aerodynamic stabilization and magnetic torquers.
  • The modulated infrared light emitted from our ground station is experimented as command transmission link. The command format conforms to the infrared remote-control system used in electrical appliances.
  • Camera image is downlinked by Slow Scan Television. The camera takes a photograph of the Earth with a resolution of is 320×240 pixels. The photograph taken is converted into analog SSTV signal, transferred to Communication and sent by FM-SSTV downlink.
  • A technology demonstration of gyro sensor and magnetic sensor which has not been confirmed its operation in space.

The satellite launched on board of Dragon CRS-25 on a Falcon-9 v1.2 (Block 5) rocket to be delivered to the ISS, from where it is to be deployed via the JEM airlock.

Nation: Japan
Type / Application: Technology, education
Operator: Happy Science University in Chosei, Chiba
Contractors: Happy Science University in Chosei, Chiba
Equipment: Cameras
Configuration: CubeSat (1U)
Propulsion: None
Power: Solar cells, batteries
Lifetime: ~ 6 months
Mass: 1 kg
Orbit: 400 km 400 km, 51.6 (typical)
Satellite COSPAR Date LS Launch Vehicle Remarks
HSU-SAT 1 1998-067UB 15.07.2022 CCK LC-39A Falcon-9 v1.2 (Block 5) with Dragon CRS-25, EMIT, BeaverCube, CLICK A, D3, JAGSAT 1, CapSat 1, FUTABA, TUMnanoSAT


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