This GOES-8 Sounder tutorial is a product of the Cooperative Institute for Meteorological Satellite Studies ( CIMSS ), located at the University of Wisconsin-Madison. CIMSS is a cooperative institute formed through a memorandum of understanding between the University of Wisconsin-Madison, the National Oceanic and Atmospheric Administration (NOAA) and the National Aeronatics and Space Administration (NASA). This material was prepared by the National Environmental Satellite Data and Information Service (NESDIS) Systems Design and Applications Branch together with University scientists within CIMSS.