1. Lt. Colonel, Dept. of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson AFB, OH 45433.
2. Distinguished Professor, Dept. of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson AFB, OH 45433 (corresponding author).
3. Associate Professor, Dept. of Mathematics and Statistics, Air Force Institute of Technology, Wright-Patterson AFB, OH 45433.