[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Univ Maryland, College Pk, MD 20742 USA
[3] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA
[4] Sci Syst & Applicat Inc, Lanham, MD 20706 USA
[5] Cardiff Univ, Cardiff CF24 3YB, S Glam, Wales
[6] Observ Paris, F-92195 Meudon, France
[7] Univ Oxford, Oxford OX1 3PU, England
[8] European So Observ, D-85748 Garching, Germany
[9] Cornell Univ, Ithaca, NY 14853 USA
[10] Ist Astrofis Spaziale, I-00133 Rome, Italy
[11] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[12] CEA, Serv Astrophys, F-91191 Gif Sur Yvette, France
[13] Univ Gesamthsch Wuppertal, D-5600 Wuppertal, Germany
[14] Univ Hawaii, Honolulu, HI 96822 USA
[15] Univ Paris & 12, F-94010 Creteil, France
[16] QSS Grp Inc, Lanham, MD 20706 USA
[17] Stanford Univ, Stanford, CA 94305 USA
[18] SW Res Inst, Boulder, CO 80302 USA