Gelsomina Pappalardo, IMAA-CNR Istituto di Metodologie per l'Analisi Ambientale, Potenza, Italy; and J. Bösenberg, A. Ansmann, D. Balis, C. Böckmann, A. Chaikovsky, A. Comeron, R. Eixmann, I. V. Grigorov, A. Hågård, V. Mitev, S. Nickovic, A. Papayannis, J. Pelon, M. R. Perrone, D. Resendes, V. Rizi, V. Simeonov, P. Sobolewski, N. Spinelli, T. Trickl, G. Vaughan, M. Wiegner, and M. Zavrtanik

Ellsworth J. Welton, NASA/GSFC, Greenbelt, MD; and J. R. Campbell, T. A. Berkoff, S. Valencia, J. D. Spinhirne, B. Holben, and S. C. Tsay

http://mplnet.gsfc.nasa.gov

Raymond M. Hoff, JCET/Univ. of Maryland Baltimore County, Baltimore, MD; and K. J. McCann, W. W. McMillan, R. Rogers, N. Jordan, K. Mubenga, F. Moshary, M. Newchurch, T. J. Duck, and E. W. Eloranta

http://alg.umbc.edu/REALM

Richard Ferrare, NASA/LRC, Hampton, VA; and D. Turner, M. Clayton, D. Covert, R. Elleman, H. Jonsson, B. Schmid, J. Redemann, J. Ogren, E. Andrew, M. Chin, I. Brooks, S. Guibert, and M. Schultz

Janet L. Machol, Univ. of Colorado and NOAA/ETL, Boulder, CO

E. W. Eloranta, University of Wisconsin-Madison, Madison, WI; and I. A. Razenkov, J. P. Garcia, and J. Hedrick