1. NOAA/NESDIS/National Climatic Data Center, and CICS/ESSIC, University of Maryland, College Park, College Park, Maryland
2. ESSIC, University of Maryland, College Park, College Park, Maryland
3. NOAA/NESDIS/National Climatic Data Center, Asheville, North Carolina
4. Science Systems and Applications, Inc., Lanham, and NASA Goddard Space Flight Center, Greenbelt, Maryland