Comparison of aerosol optical depth from four solar radiometers during the Fall...
Schmid, B., J. J. Michalsky, R. Halthore, M. C. Beauharnois, L. C. Harrison, J. M. Livingston, and P. B. Russell (1999), Comparison of aerosol optical depth from four solar radiometers during the Fall 1997 ARM Intensive Observation Period, Geophys. Res. Lett., 26, 2725-2728.