Title from AIAA paper 2001-2727. Some of the papers were presented at 32nd AIAA Plasmadynamics and Lasers Conference, 4th Weakly Ionized Gases Workshop, 11-14 June 2001 / Anaheim, CA. Other paper numbers in this range may be found in the following conferences: 31st AIAA Fluid Dynamics Conference and Exhibit - call #: TA357.A42 2001, 35th AIAA Thermophysics Conference - call #: TL900.A42 2001