Absolute solar transmittance interferometer for ground-based measurements

Details Absolute solar transmittance interferometer for ground-based measurements Absolute solar transmittance interferometer for ground-based measurements

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apopt..41.3582h&link_type=abstract

Applied Optics, vol. 41, iss. no. 18, p. 3582-3589

Physics

Optics

Astronomical Interferometry, Atmospheric Optics, Calibrating, Infrared Spectra, Interferometers, Remote Sensing, Solar Radiation, Telescopes

Scientific paper

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.

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