W. Paul Menzel* and James F. W. Purdom+
*Advanced Satellite Products Project, National Environmental Satellite Data and Information Service, NOAA, Madison, Wisconsin.
+Regional and Mesoscale Meteorology Branch, National Environmental Satellite Data and Information Service, NOAA, Ft. Collins, Colorado.
Corresponding author address: Dr. W. Paul Menzel, NESDIS/ASPP, Room 201, 1225 West Dayton St., Madison, Wl 53706.
In final form 17 February 1994.
�1994 American Meteorological Society