Here is the Double-Telescope system. It detects and magnifies surveillance balloons located up to 10 km away. Here, the Double-Telescope has spotted and magnified a small test balloon, only 2 feet across, located 0.5 km away.
The Double-Telescope system tracks and magnifies the surveillance balloon.
Three short videos showing the Double-Telescope tracking and magnifying the surveillance balloon, alerting NORAD and providing live video.
All-Sky balloon reconnaissance camera. It views the entire sky, 1 frame per second,
to achieve early detection of incoming balloons. The double-telescope system then can magnify
the balloon.