1. Applied Physics Laboratory, The Johns Hopkins University, Laurel, Maryland
2. Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, Florida
3. Science Systems and Applications, Inc., Lanham, Maryland
4. GESTAR, NASA Goddard Space Flight Center, Greenbelt, and The John Hopkins University, Baltimore, Maryland
5. Atmospheric Chemistry Division, NCAR, Boulder, Colorado
6. Heliophysics Division, NASA, Washington, D.C.