[1] Dept. of Aerosp. Eng. Sciences, University of Colorado, Boulder, CO, United States
[2] High Altitude Observatory, Natl. Ctr. for Atmospheric Research, Boulder, CO, United States
[3] Dept. of Aerosp. Eng. Sciences, Campus Box 429, University of Colorado, Boulder, CO 80309-0429, United States
[4] HAO, NCAR, P. O. Box 3000, Boulder, CO 80307-3000, United States