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Interkosmos 22 (Bulgaria 1300, 11F65)

Interkosmos 22 (Bulgaria 1300) [Interkosmos]

The spacecraft Interkosmos 22 (Bulgaria 1300) was a research satellite, that carried a set of plasma, particles, fields, and optical experiments designed and constructed in Bulgaria on a satellite bus provided by the Soviet Union as part of the Interkosmos program.

The spacecraft was three-axis stabilized, based on the VNIIEM built Meteor bus, with the negative Z-axis pointing toward the nadir and the X-axis pointing along the velocity vector. The outer skin of the spacecraft, including the solar panels, was coated with a conducting material in order to allow the proper measurement of electric fields and low energy plasma. Both active and passive thermal control were employed. The solar panels supplied 2 kW and batteries were used during eclipse periods. For data storage, there were two tape recorders, each with a capacity of 60 megabits. The transmitter radiated about 10 W in the 130 MHz band.

Experiments on board were:

  • Ion Drift Meter and Retarding Potential Analyzer
  • Spherical Electrostatic Ion Trap
  • Cylindrical Langmuir Probe
  • Double Spherical Electron Temperature Probes
  • Low-Energy Electron-Proton Electrostatic Analyzer Array in 3 Orthogonal Directions
  • Ion Energy-Mass Composition Analyzers
  • Wavelength Scanning UV Photometer
  • Proton Solid-State Telescope
  • Visible Airglow Photometers
  • Triaxial Spherical Vector Electric Field Probes
  • Triaxial Fluxgate Magnetometer
Nation: International
Type / Application: Science
Operator: Bulgarian Space Research Institute, Interkosmos
Contractors: VNIIEM (bus); Bulgarian Space Research Institute (instruments)
Equipment: see above
Configuration: Meteor Bus
Power: 2 deployable solar arrays, batteries
Mass: 1500 kg
Orbit: 825 km × 906 km, 81.2
Satellite COSPAR Date LS Launch Vehicle Remarks
Interkosmos 22 (Bulgaria 1300) 1981-075A 07.08.1981 Pl LC-43/3 Vostok-2M


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