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The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) is a European Space Agency (ESA) mission designed to study celestial gamma-ray sources in the 15 keV to 10 MeV energy range. The primary INTEGRAL science payload consists of a gamma ray spectrometer (SPI) operating over 20 keV-8 MeV, a gamma ray imager (IBIS) operating over 15 keV-10 MeV, an X-ray monitor (JEM-X) operating in the 3-35 keV band, and an Optical Monitoring Camera (OMC) operating at 550 nm.

The spacecraft was launched on October 17, 2002 into a 66 hr., 639 x 153,000 km orbit at 51.7 degrees inclination. The mission is scheduled to last 2 years, and up to 5 years is possible. The spacecraft is three-axis stabilized with an absolute pointing error of 5 (y,z) to 15 (x) arcmin and an absolute measurement error of 1 (y,z) to 3 (x) arcmin. The spacecraft with solar panels stowed is roughly 3 x 4 x 5 m in size with a mass of about 4000 kg, 520 kg of that being hydrazine fuel. Science telemetry will be transmitted in S-band at 86 kbit/s to ground stations in Redu (Belgium) and Goldstone (US).

Alternate Names

  • 27540
  • International Gamma-Ray Astrophysics Laboratory

Facts in Brief

Launch Date: 2002-10-17
Launch Vehicle: Proton-K
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan
Mass: 3500 kg
Nominal Power: 690 W

Funding Agency

  • European Space Agency (International)


  • Astronomy

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Mr. Christoph WinklerProject ScientistRuhr-Universitat Bochum

Selected References

  • Georgoulis, M. K., et al., Analysis and interpretation of inner-heliospheric SEP events with the ESA Standard Radiation Environment Monitor (SREM) onboard the INTEGRAL and Rosetta Missions, J. Space Weather Space Clim., 8, A40, 32 pp., doi:10.1051/swsc/2018027, Sept. 2018.

US Active Archive for INTEGRAL Information/Data


Other Sources of INTEGRAL Information/Data

INTEGRAL Science Data Centre

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