FIRST: far-infrared and submillimeter space telescope, a major scientific project of the European Space Agency

Details FIRST: far-infrared and submillimeter space telescope, a major scientific project of the European Space Agency FIRST: far-infrared and submillimeter space telescope, a major scientific project of the European Space Agency

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994opten..33..785l&link_type=abstract

Optical Engineering 33(03), 785-790, Brian J. Thompson; Ed.

Astronomy and Astrophysics

Astronomy

Scientific paper

As one of the four cornerstones of its scientific program Horizon 2000, the European Space Agency is studying a far-infrared and submillimeter space telescope (FIRST) that will open to astronomical observations the 100-micrometers to 1-mm spectral region, virtually unexplored with a subarcminute angular resolution. The 3- to 4-m-diam telescope will be diffraction limited at (lambda) equals 300 micrometers or less. The expected lifetime of this system in orbit is five years or more. The model payload is composed of two focal instruments. The multifrequency heterodyne spectrometer will give a very high spectral resolution in the 400- to 630-micrometers wavelength range and around 300 micrometers . The far-infrared receiver (FIR) will be an imaging spectrometer covering the 100- to 400-micrometers range with spectral resolutions ranging from 3 to 104 obtained with a set of Fabry-Perot interferometers and filters. Arrays of photoconductors and bolometers are cooled at 1.5 and 0.15 K, respectively, by an open-cycle 3He/4He dilution + Joule-Thomson expansion system developed to operate at zero gravity.

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