He specializes in the dynamics and control of spacecraft using avionics sensors such as GPS navigation and attitude determination. Prior to joining the University of Texas in 1999, Dr. Lightsey worked at NASA’s Goddard Space Flight Center for eight years, where he designed control systems for several NASA spacecraft. At the University of Texas, Dr. Lightsey has developed, tested, and fl own space receivers that perform attitude determination and control as well as relative navigation and formation control.