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Mission Profile

Name (pre-launch in parentheses) REIMEI (INDEX)
International Designation Code 2005-031B
Objectives Demonstration of next-generation advanced satellite technologies in orbit
Realization of small-scale, frequent scientific observation missions
Launch Date 06:10, August 24, 2005 (JST)
Location Republic of Kazakhstan
Launch Vehicle Dnepr (launched together with OICETS satellite)
Configuration Weight Approx. 72 kg
Dimensions Approx. 62 × 62 × 72 cm

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Orbit Altitude Perigee 610 km, Apogee 654 km
Inclination 97.8°
Type of Orbit Near-circular orbit
Period 97 min
Attitude Control Method Bias Momentum Three Axis Stabilized Attitude Control
Scientific Instruments
  1. Star tracker
  2. Spin/non-spin type solar sensors (SSAS/NSAS)
  3. Geomagnetic Aspect sensor (GAS)
  4. Three-axis optical fiber gyro (FOG)
  5. Reaction wheel (RW) and magnetic torquer (MTQ) as actuators
  6. Multi-spectral Auroral Camera (MAC)
  7. Aurora particle observation instrument (Electron/Ion Spectrum Analyzer: ESA/ISA)
Operation All the onboard instruments are operational in orbit. We succeeded in demonstrating advanced onboard satellite instrument technologies in orbit, including a solar-concentrated paddle using thin-film reflector and ultra-small GPS receiver as engineering missions.
Results We successfully obtained scientific results in terms of both satellite engineering and space science, and were able to demonstrate the effectiveness of small satellite.