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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 24 — Aug. 20, 2014
  • pp: 5425–5433

Far-infrared spectroscopy of the troposphere: calibration with a cold background

Harri Latvakoski, Martin G. Mlynczak, Richard P. Cageao, David G. Johnson, and David P. Kratz  »View Author Affiliations


Applied Optics, Vol. 53, Issue 24, pp. 5425-5433 (2014)
http://dx.doi.org/10.1364/AO.53.005425


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Abstract

The far-infrared spectroscopy of the troposphere (FIRST) instrument is a Fourier-transform spectrometer developed to measure the Earth’s thermal emission spectrum with a particular emphasis on the far-infrared. FIRST has observed the atmosphere from both the ground looking up and from a high-altitude balloon looking down. A recent absolute laboratory calibration of FIRST under ground-like operating conditions showed accuracy to better than 0.3 K at near-ambient temperatures (270–325 K) but reduced accuracy at lower temperatures. This paper presents calibration results for balloon-flight conditions using a cold blackbody to simulate the space view used for on-board calibration. An unusual detector nonlinearity was discovered and corrected, and stray light was measured and removed. Over most of the range of Earth scene temperatures (205–300 K), the accuracy of FIRST is 0.35–0.15 K (one sigma).

© 2014 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.7030) Atmospheric and oceanic optics : Troposphere
(010.0280) Atmospheric and oceanic optics : Remote sensing and sensors

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: April 28, 2014
Manuscript Accepted: June 4, 2014
Published: August 15, 2014

Citation
Harri Latvakoski, Martin G. Mlynczak, Richard P. Cageao, David G. Johnson, and David P. Kratz, "Far-infrared spectroscopy of the troposphere: calibration with a cold background," Appl. Opt. 53, 5425-5433 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-24-5425


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References

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