http://www.ApogeeRockets.com/ How to track a model rocket to find out how high it flew. This video will show you how to optically track a rocket's flight, and how to figure out from angular measurement the peak altitude. It is a great activity for school students, as it gives them something to do while the other students are flying their own model rockets. The technical name for the altitude tracking device is called an inclinometer. The chart we use to determine the height from the angular measurement is called the altitude nomograph.