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Composite infrared spectrometer (CIRS) on Cassini

Jennings, D. E., Flasar, F. M., Kunde, V. G., Nixon, C. A., Segura, M. E., Romani, P. N., Gorius, N., Albright, S., Brasunas, J. C., Carlson, R. C., Mamoutkine, A. A., Guandique, E., Kaelberer, M. S., Aslam, S., Achterberg, R. K., Bjoraker, G. L., Anderson, C. M., Cottini, V., Pearl, J. C., Smith, M. D., Hesman, B. E., Barney, R. D., Calcutt, S., Vellacott, T. J., Spilker, L. J., Edgington, S. G., Brooks, S. M., Ade, Peter, Schinder, P. J., Coustenis, A., Courtin, R., Michel, G., Fettig, R., Pilorz, S. and Ferrari, C. 2017. Composite infrared spectrometer (CIRS) on Cassini. Applied Optics 56 (18) , pp. 5274-5294. 10.1364/AO.56.005274

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Abstract

The Cassini spacecraft orbiting Saturn carries the composite infrared spectrometer (CIRS) designed to study thermal emission from Saturn and its rings and moons. CIRS, a Fourier transform spectrometer, is an indispensable part of the payload providing unique measurements and important synergies with the other instruments. It takes full advantage of Cassini’s 13-year-long mission and surpasses the capabilities of previous spectrometers on Voyager 1 and 2. The instrument, consisting of two interferometers sharing a telescope and a scan mechanism, covers over a factor of 100 in wavelength in the mid and far infrared. It is used to study temperature, composition, structure, and dynamics of the atmospheres of Jupiter, Saturn, and Titan, the rings of Saturn, and surfaces of the icy moons. CIRS has returned a large volume of scientific results, the culmination of over 30 years of instrument development, operation, data calibration, and analysis. As Cassini and CIRS reach the end of their mission in 2017, we expect that archived spectra will be used by scientists for many years to come.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: OSA Publishing
ISSN: 0003-6935
Date of First Compliant Deposit: 20 July 2017
Date of Acceptance: 20 June 2017
Last Modified: 20 Jun 2018 04:27
URI: http://orca-mwe.cf.ac.uk/id/eprint/102676

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