Integral

International Gamma Ray Astrophysics Laboratory

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General

Designation	27540 / 02048A
Launch date	17 Oct 2002
Country of origin	Europe
Mission	Scientific: gamma-ray astronomy
Perigee/Apogee	9000/153000 km
Inclination	51.6°
Period	66 hours
Launch vehicle	Proton #297

The launch is provided against 25% of the observation time to Russian scientists.

Safe reentry is planned in 2029.

Satellite went into safe mode on 22 Sep 2021 when it sparted spinning after a reaction wheel incident. Control was regained and normal science activities resumed on 1 Oct 2021.

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External resources

http://astro.estec.esa.nl/SA-general/Projects/Integral/integral.html

http://sci.esa.int/integral/
http://isdc.unige.ch/
sat-index articles

Technical data

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Specifications

Prime contractor	Alenia Aerospazio
Platform	Same as XMM
Mass at launch	4100 kg
Mass in orbit
Payload mass	~ 2000 kg
Dimension	5 m height x 3.7 m diameter
Solar array
Stabilization
DC power
Design lifetime

It has turned out that the satellite is affected by space weather. The constant rain of tiny particles can temporarily blind detectors designed to register gamma radiation.

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Instruments

Spectrometer SPI (Spectrometer on Integral): sources in 20 keV - 8 MeV, 0.7m coded mask telescope
Imager IBIS (Imager on Board the Integral Satellite): sources in 20 keV - 10 MeV, 1.1m square coded mask telescope
X-Ray Monitor JEM-X, two 0.5m coded mask telescopes covering the 3 - 35 keV range
Optical Monitoring Camera OMC, 0.05m aperture optical telescope
Integral Science Data Centre Isdc

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