Improving multichannel radiometer calibration and data quality

Susana B. Diaz; Charles Rockwell Booth; Guillermo Deferrari; Carolina Camilion; James Robertson

doi:10.1117/12.482307

5 September 2002 Improving multichannel radiometer calibration and data quality

Susana B. Diaz, Charles Rockwell Booth, Guillermo Deferrari, Carolina Camilion, James Robertson

Proceedings Volume 4815, Atmospheric Radiation Measurements and Applications in Climate; (2002) https://doi.org/10.1117/12.482307
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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 50^a, then, this technique could be particularly beneficial to calibrate radiometers installed at high latitudes, where SZA during winter, even at noon, are larger than 50^a.

Citation Download Citation

Susana B. Diaz, Charles Rockwell Booth, Guillermo Deferrari, Carolina Camilion, and James Robertson "Improving multichannel radiometer calibration and data quality", Proc. SPIE 4815, Atmospheric Radiation Measurements and Applications in Climate, (5 September 2002); https://doi.org/10.1117/12.482307

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