Data were obtained from the Atmospheric Radiation Measurement (ARM) Program sponsored by the U.S. Department of Energy, Office of Energy Research, Office of Health and Environmental Research, Environmental Sciences Division. We thank Richard Irish for providing us information about the ACCA algorithm, and W. Wiscombe, R. Pincus, A. Davis for helpful discussions. Thanks also go to M. Mischenko of NASA GISS for making the ISCCP ice crystal phase function available to us. This research was supported by funding provided under Landsat Science Team activities, which are part of NASA-MTPE, under Proposal 1996-MTPE-00116, the Department of Energy’s ARM program under Grants DE-A102-97ER62369, and DE-A105-90ER61069, and NASA Grant NAG5-6675 as part of the EOS validation program.
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