I was on perimeter guard duty with 3 others who were off watch and asleep.I remember this vividly and can't ever forget it.while looking to the North West, right above the treeline Inoticed a bright luminous object. It was silverist/blue/white. I noticed it move to ward the South a little then stop on a dime, leaving a trailing tracing effect (a blur of light)from start to stop. repeating this numerous times.when it was almost due South it shot upward at about 45 degrees back toward the North.I can't describe the shape, size or distance accurately.It was distant several miles, best guest. It deffinately was'nt any of our aircraft.