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ESRO 1A, 1B (Aurorae, Boreas)

ESRO 1A (Aurorae) [ESA]

ESRO-1A / Aurorae (European Space Research Organisation) was a 80 kg, cylindrically shaped, solar-cell-powered spacecraft instrumented with seven scientific experiments chosen to measure a comprehensive range of auroral effects. The measurements include auroral luminosity, ionospheric composition and temperature, and the flux, type and energy spectra of trapped and precipitated energetic particles (electrons of energies 1 to 30,000 keV. The spacecraft was placed in a low polar orbit with its axis of symmetry magnetically aligned along the earth's field. It had operated satisfactorily for 18 months, except for the tape recorder which failed after 7 months.  

ESRO 1B / Boreas conducted correlative studies with the identical satellite ESRO 1A / Aurorae.

Its experiements were:

  • Trapped and Precipitated Electron Flux and Energy Spectra
  • High Latitude Particle Electrostatic Analyzer
  • Trapped and Precipitated Proton Spectra
  • Pitch Angle Distribution of Electrons and Protons
  • Flux and Energy Spectra of Solar Protons
  • Auroral Photometers
  • Langmuir Probe
  • Ion Composition and Temperature
Nation: Europe
Type / Application: Research
Operator: ESRO
Contractors: Laboratoire Central de Telecommunications
Power: Solar cells, batteries
Mass: 80 kg
Orbit: 258 km × 1538 km, 93.7 (#1A); 291 km × 389 km, 86 (#1B)
Satellite COSPAR Date LS Launch Vehicle Remarks
ESRO 1A (Aurorae) 1968-084A 03.10.1968 Va SLC-5 Scout-B
ESRO 1B (Boreas) 1969-083A 01.10.1969 Va SLC-5 Scout-B


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