[1] Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA
[2] Inst Nucl Phys, PAN, PL-31342 Krakow, Poland
[3] LUTH, Observ Paris, F-92195 Meudon, France
[4] Univ Kansas, Dept Phys & Astrophys, Lawrence, KS 66045 USA
[5] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
[6] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[7] Clemson Univ, Clemson, SC 29634 USA
[8] NASA, MSFC, Huntsville, AL 35805 USA