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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 10 — Apr. 1, 2009
  • pp: 1912–1925

Infrared limb sounding of Titan with the Cassini Composite InfraRed Spectrometer: effects of the mid-IR detector spatial responses

Conor A. Nixon, Nicholas A. Teanby, Simon B. Calcutt, Shahid Aslam, Donald E. Jennings, Virgil G. Kunde, F. Michael Flasar, Patrick G.J. Irwin, Fredric W. Taylor, David A. Glenar, and Michael D. Smith  »View Author Affiliations


Applied Optics, Vol. 48, Issue 10, pp. 1912-1925 (2009)
http://dx.doi.org/10.1364/AO.48.001912


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Abstract

The composite infrared spectrometer (CIRS) instrument on board the Cassini Saturn orbiter employs two 1 × 10 HgCdTe detector arrays for mid-infrared remote sensing of Titan’s and Saturn’s atmospheres. In this paper we show that the real detector spatial response functions, as measured in ground testing before launch, differ significantly from idealized “boxcar” responses. We further show that neglecting this true spatial response function when modeling CIRS spectra can have a significant effect on interpretation of the data, especially in limb-sounding mode, which is frequently used for Titan science. This result has implications not just for CIRS data analysis but for other similar instrumental applications.

© 2009 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.6340) Spectroscopy : Spectroscopy, infrared
(010.0280) Atmospheric and oceanic optics : Remote sensing and sensors

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: August 21, 2008
Revised Manuscript: January 30, 2009
Manuscript Accepted: February 25, 2009
Published: March 26, 2009

Citation
Conor A. Nixon, Nicholas A. Teanby, Simon B. Calcutt, Shahid Aslam, Donald E. Jennings, Virgil G. Kunde, F. Michael Flasar, Patrick G. Irwin, Fredric W. Taylor, David A. Glenar, and Michael D. Smith, "Infrared limb sounding of Titan with the Cassini Composite InfraRed Spectrometer: effects of the mid-IR detector spatial responses," Appl. Opt. 48, 1912-1925 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-10-1912

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