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Hodoyoshi 2 (RISESat)

Hodoyoshi 2 [RISESat consortium]

Hodoyoshi 2 or RISESat (Rapid International Scientific Experiment Satellite) is a small experimental earth-observing, science and technology demonstration satellite.

RISESAT carries 8 scientific instruments with a total mass of 10 kg developed by the following countries: Sweden, Czech Republic, Hungary, Taiwan, Vietnam, USA and Germany.

Following payloads are on board:

  • HPT (High Precision Telescope) - a telescope equipped with two separate LCTFs (Liquid Crystal Tunable Filters) in overlapping wavelength ranges, which is based on an instrument of Rising 2. Each LCTF is combined with a CCD matrix detector, providing a pixel resolution of 5 m from an altitude of 700 km. It is to measure the optical properties of solar radiation reflected from land and sea surfaces. The LCTF can be tuned to any desired wavelength by a computer command within its spectral range.
  • DOTCam (Dual-band Optical Transient Camera) - a camera system developed by NCKU (National Cheng Kung University) of Taiwan to observe TLEs (Transient Luminous Events) in Earth's upper atmosphere.
  • OOC (Ocean Observation Camera) - a multi-band WFOV (Wide Field of View) camera system in the VIS range designed for ocean surface observation. The resolution is about 100 m with a swath width of about 65 km.
  • TriTel (Three-dimensional Telescope) - an advanced dosimetric instrument developed by the Centre of Energy Research of the Hungarian Academy of Science, Budapest, Hungary
  • Timepix (Space Radiation micro-Tracker)- a detector developed at the IEAP CTU (Institute of Experimental and Applied Physics of the Czech Technical University), Prague, Czech Republic to characterize the mixed radiation field, especially the entire charged particle spectrum from energetic electrons, protons, up to relativistic cosmic-ray ions
  • µMAG (micro-Magnetometer- a MEMS-based magnetic field detector developed by ÅAC Microtec, former ÅSTC (Ångström Space Technology Centre) of Uppsala University, Uppsala, Sweden)
  • VSOTA (Very Small Optical TrAnsponder) - an optical communications terminal developed by NICT (National Institute of Information and Communication Technology), Tokyo, Japan
  • DPD (Data Packet Decoder) - a store-and-forward device designed for global environmental monitoring based on technology developed for WEOS

Hodoyoshi 2 will be launched piggy-back as a secondary payload.

Nation: Japan
Type / Application: Technology, Earth observation
Operator: University of Tokyo, RISESat consortium
Contractors: University of Tokyo, RISESat consortium
Equipment: HPT, DOTCam, OOC, TriTel, Timepix, µMAG, VSOTA, DPD
Power: Solar cells, batteries
Mass: ~50 kg
Orbit: SSO
Satellite COSPAR Date LS Launch Vehicle Remarks
Hodoyoshi 2 (RISESat) - with ?