1. Atmospheric and Environmental Research, Inc.; Lexington Massachusetts USA
2. Naval Research Laboratory; Washington D. C. USA
3. National Center for Atmospheric Research; Boulder Colorado USA
4. Jet Propulsion Laboratory; Pasadena California USA
5. NASA Langley Research Center; Hampton Virginia USA
6. NOAA Aeronomy Laboratory; Boulder Colorado USA
7. Harvard University; Cambridge Massachusetts USA
8. California Institute of Technology; Pasadena California USA
9. Georgia Institute of Technology; Atlanta Georgia USA
10. NASA Ames Research Center; Moffett Field California USA