1. National Aeronautics and Space Administration Goddard Space Flight Center, Code 916, Greenbelt, MD 20771
2. Applied Research Corporation, Landover, MD 20785
3. National Oceanic and Atmospheric Administration Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303
4. National Meteorological Center Climate Analysis Center, World Weather Building, Washington, DC 20233
5. Department of Geosciences, Physical Sciences Annex 206, University of California, Irvine, CA 92717
6. Harvard University Atmospheric Research Project, Engineering Science Laboratory, 40 Oxford Street, Cambridge, MA 02138