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Applied Optics

Applied Optics


  • Vol. 41, Iss. 18 — Jun. 20, 2002
  • pp: 3582–3589

Absolute solar transmittance interferometer for ground-based measurements

Toufic Hawat, Thomas Stephen, and Frank Murcray  »View Author Affiliations

Applied Optics, Vol. 41, Issue 18, pp. 3582-3589 (2002)

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The absolute solar transmittance interferometer measures absolute solar radiance at the Earth’s surface. The instrument is based on a Fourier-transform spectrometer that utilizes a liquid-nitrogen-cooled InSb detector and appropriate optical bandpass filters. The recorded solar spectra are calibrated against National Institute of Standards and Technology traceable lamps and a blackbody source. The spectral range addressed by this instrument is from 1950 to 10100 cm-1 at a resolution of 2 cm-1. The optical design of the instrument and the experimental methods are discussed. A discussion of the uncertainties involving the instrument and the calibration sources is presented. Initial measurements from several sites are compared with atmospheric model calculations.

© 2002 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.1310) Remote sensing and sensors : Atmospheric scattering
(300.6340) Spectroscopy : Spectroscopy, infrared

Original Manuscript: October 23, 2001
Revised Manuscript: March 11, 2002
Published: June 20, 2002

Toufic Hawat, Thomas Stephen, and Frank Murcray, "Absolute solar transmittance interferometer for ground-based measurements," Appl. Opt. 41, 3582-3589 (2002)

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