This computation involved: SRB satellite Pinker algorithm using ISCCP-C1 and ERBE data deployed on NASA Langley Atmospheric Science Data Center (ASDC). The primary data source is the International Satellite Cloud Climatology Project (ISCCP) C1 data product. Using the ISCCP C1 parameters as input, SRB results are generated using two different algorithms. The Pinker algorithm (developed jointly by Drs. R.T. Pinker and I. Laszlo form the University of Maryland) is a physical model which uses an iterative procedure based on delta-Eddington radiative transfer calculations. The Staylor algorithm (developed by Mr. W.F. Staylor from the NASA Langley Research Center) is a parameterized physical model in which both cloud and aerosol transmission characteristics have been separately tuned to historical data at various locations around the globe. Earth Radiation Budget Experiment (ERBE) data are also used as input to the models. The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center is responsible for the processing, archival, and distribution of NASA Earth science data in the areas of radiation budget, clouds, aerosols, and tropospheric chemistry. The Data Center was established in 1991 to support the Earth Observing System (EOS) as part of NASA's Earth Science enterprise and the U.S. Global Change Research Program, and is one of several Distributed Active Archive Centers (DAACs) sponsored by NASA as part of the Earth Observing System Data and Information System (EOSDIS). The Data Center specializes in atmospheric data important to understanding the causes and processes of global climate change and the consequences of human activities on the climate.