Retrieving Cloud Characteristics from Ground-Based Daytime Color All-Sky Images Long, C. N. ; Sabburg, J. M. ; Calbó, J. ; Pagès, D. Abstract Publication: Journal of Atmospheric and Oceanic Technology Pub Date: 2006 DOI: 10.1175/JTECH1875.1 Bibcode: 2006JAtOT..23..633L