A new multiwavelength sun-photometer has been developed to obtain accurate measurements of the atmospheric attenuation of direct solar radiation at seven window wavelengths in the visible and near-infrared spectral range. The instrument’s optical features and performance are described. The photometer was calibrated by following a careful procedure based on the Langley method. An additional eighth bandpass filter was used to obtain measurements of the precipitable water. Five examples of this instrument have been constructed and calibrated for a network of mountain stations in Southern Italy to monitor Sahara dust transport episodes.
© 1983 Optical Society of America
Original Manuscript: June 8, 1982
Published: February 15, 1983
Claudio Tomasi, Franco Prodi, Monica Sentimenti, and Giulio Cesari, "Multiwavelength sun-photometers for accurate measurements of atmospheric extinction in the visible and near-IR spectral range," Appl. Opt. 22, 622-630 (1983)