The rocket uses triangle shaped flight limit lines which determine if it is safe to light the next stage. Between stages (coast phase), the rocket slows down below any GPS velocity restriction and is able to provide accurate data. The system is fail safe, such that it will only light if everything is a go (data from GPS is not stale or unavailable, no pending ground abort)

The rocket had to abort when we launched in Nevada last year in May, because it would have gone outside of our 12 mile hazard area.

Haven't been able to launch another one because of weather. Winter time is pretty cloudy/rainy out here.

This little rocket is not critical for our X-prize development and we will be launching a more exciting rocket shortly.. :)