https://doi.org/10.5194/acp-18-4201-2018-supplement

IMPROVE (Interagency Monitoring of Protected Visual Environments): Spatial and seasonal patterns and temporal variability of haze and its constituents in the United States J. L., Hand, S. A. Copeland, D. E. Day, A. M. Dillner, H. Indresand, W. C. Malm, C. E. McDade, C. T. Moore, M. L. Pitchford, B. A. Schichtel, and J. G. Watson http://vista.cira.colostate.edu/Improve/spatial-and-seasonal-patterns-and-temporal-variability-of-haze-and-its-constituents-in-the-united-states-report-v-june-2011/

NOAA Climate Data Record (CDR) of Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) M. Claverie, E. Vermote, and NOAA-CDR-Program https://doi.org/10.7289/V5M043BX

Status and performance of the CALIOP lidar D. M. Winker, W. Hunt, and C. Hostetler https://doi.org/10.1117/12.571955