Spectral variations of optical depth at Tucson, Arizona between August 1975 and December 1977.

Abstract

A multi-wavelength solar radiometer has been used to monitor the directly transmitted solar radiation at discrete wavelengths spaced through the visible and near-infrared wavelength regions. Results of this analysis for 133 clear stable days are presented for a 29- month period between August 1975 and December 1977. -from Authors