More than 70 eyewitnesses reported seeing the spectacle, and American military satellites closely tracked the trajectory.

They are often numbered so that satellites can track their movement.

If circumstances required, satellites could track and identify any vehicle on the planet's surface.

The convoy should be able to make thirteen knots, but our satellites are tracking it at only ten.

A satellite will track the movements of their cars, deducting money when drivers use popular roads, particularly in rush hour.

Both companies use systems that employ satellites to track the customer's location.

Japanese defense officials say American military satellites first tracked the boat as it entered Japanese waters.

The Grace measurements should be very exacting because each satellite should track the other with extreme precision.

The satellites also track the animal's path as it moves.

These satellites can track the speed at which ice sheets move.