Flight performance of the Near-Infrared Spectrometer

Details Flight performance of the Near-Infrared Spectrometer Flight performance of the Near-Infrared Spectrometer

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2817..248n&link_type=abstract

Proc. SPIE Vol. 2817, p. 248-257, Infrared Spaceborne Remote Sensing IV, Marija S. Scholl; Bjorn F. Andresen; Eds.

Computer Science

Performance

10

Scientific paper

The near-infrared spectrometer (NIRS) is one of the focal plane instruments of the infrared telescope in space (IRTS). The NIRS is a simple grating spectrometer with two element InSb linear arrays, and was designed to measure the absolute sky brightness at the wavelengths from 1.4 to 4.0 micrometer with a spectral resolution of 0.13 micrometer and a beam size of 8 feet by 8 feet. The IRTS was launched on 1995 March 18. The NIRS worked well throughout the observation period from March 29 to April 25, and scanned about 7% of the entire sky. Multiple passage of bright stars through the NIRS field of view enabled us to reconstruct the beam pattern and to calibrate the sensitivity. Those flight data confirmed good performance of the NIRS on the orbit as was expected from the preflight measurements.

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