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Proceedings Paper

Improving multichannel radiometer calibration and data quality
Author(s): Susana B. Diaz; Charles Rockwell Booth; Guillermo Deferrari; Carolina Camilion; James Robertson
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Paper Abstract

When a multi-channel radiometer is calibrated using the sun as calibration source, the error in the calculated calibration constants may be large when solar zenith angles increase. A multi-regression model has proved to be suitable to derive narrowband irradiance from broadband irradiance, ozone column and solar zenith angles (SZA). In this paper, a modification of this model is being proposed to improved the multi-channel instrument sun calibration against spectroradiometers, considering a channel of a multi-channel radiometers as a broadband instrument. The errors in the GUV irradiance, compared to the spectroradiometer irradiance, diminished considerably at all channels for SZA larger than 50a, then, this technique could be particularly beneficial to calibrate radiometers installed at high latitudes, where SZA during winter, even at noon, are larger than 50a.

Paper Details

Date Published: 5 September 2002
PDF: 7 pages
Proc. SPIE 4815, Atmospheric Radiation Measurements and Applications in Climate, (5 September 2002); doi: 10.1117/12.482307
Show Author Affiliations
Susana B. Diaz, CADIC/CONICET (Argentina)
Charles Rockwell Booth, Biospherical Instruments Inc. (United States)
Guillermo Deferrari, CADIC/NSF (Argentina)
Carolina Camilion, CADIC/IAI (Argentina)
James Robertson, Biospherical Instruments Inc. (United States)

Published in SPIE Proceedings Vol. 4815:
Atmospheric Radiation Measurements and Applications in Climate
Joseph A. Shaw, Editor(s)

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