The Infrared Space Observatory (ISO) and its instruments

Details The Infrared Space Observatory (ISO) and its instruments The Infrared Space Observatory (ISO) and its instruments

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992wadc.iafcsu...k&link_type=abstract

IAF, International Astronautical Congress, 43rd, Washington, Aug. 28-Sept. 5, 1992. 8 p.

Astronomy and Astrophysics

Astronomy

Astronomical Satellites, Infrared Detectors, Infrared Space Observatory (Iso), Optical Measuring Instruments, Ariane Launch Vehicle, Cryostats, European Space Programs, Helium, Instrument Packages, Liquid Helium, Transfer Orbits

Scientific paper

ISO, a fully approved and funded project of ESA, is an astronomical satellite observing at wavelengths of 3 to 200 microns. ISO is to provide a unique facility of unprecedented sensitivity for a detailed exploration of the universe, ranging from objects in the solar system to the most distant extragalactic sources. The satellite consists of a large cryostat containing, at launch, more than 2000 liters of superfluid helium to maintain the Ritchey-Chretien telescope, the scientific instruments, and the optical baffles at temperatures between 2 and 8 K. The telescope has a 60-cm diameter primary mirror and is diffraction-limited at a wavelength of 5 microns. A pointing accuracy of a few arcsec is provided by a three-axis-stabilization system consisting of reaction wheels, gyros, and optical sensors. ISO's instrument complement consists of an imaging photo-polarimeter, a camera, a short-wavelength spectrometer, and a long-wavelength spectrometer.

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