Abstract We describe the design and calibration of the Far-Infrared Photometer (FIRP), one of four focal plane instruments on the Infrared Telescope in Space (IRTS). The FIRP will provide absolute photometry in four bands centered at 150, 250, 400, and 700 μm with spectral resolution λ/Δλ ≈ 3 and spatial resolution ΔΘ = 0.5 degrees. High sensitivity is achieved by using bolometric detectors operated at 300 mK in an AC bridge circuit. The closed-cycle 3He refrigerator can be recycled in orbit. A 2 K shutter provides a zero reference for each field of view. More than 10% of the sky will be surveyed during the ≈3 week mission lifetime with a sensitivity of <10−13 W·cm−2·sr−1 per 0.5 degree pixel.


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    Title :

    A Far Infrared Photometer (FIRP) for the Infrared Telescope in Space (IRTS)


    Contributors:
    Freund, M.M. (author) / Hirao, T. (author) / Matsumoto, T. (author) / Sato, S. (author) / Watabe, T. (author) / Brubaker, G.K. (author) / Duband, L. (author) / Grossman, B. (author) / Larkin, N. (author) / Lumetta, S. (author)

    Published in:

    Advances in Space Research ; 13 , 12 ; 505-508


    Publication date :

    1993-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    A Far Infrared Photometer (FIRP) for the Infrared telescope in Space (IRTS)

    Freund, M. M. / Hirao, T. / Matsumoto, T. et al. | British Library Conference Proceedings | 1993


    A Far Infrared Photometer (FIRP) for the infrared telescope in space (IRTS)

    Freund, M. M. / Hirao, T. / Matsumoto, T. et al. | NTRS | 1993


    Infrared telescope in space — IRTS

    Hayakawa, S. | Elsevier | 1983


    Development of the Infrared Telescope in Space: IRTS

    Matsumoto, T. / COSPAR | British Library Conference Proceedings | 1993