RADOT stands for Recording Automatic Digital Optical Tracker. This system comprises a very versatile pedestal guided by a two-channel infrared tracker. it maintains precise tracking at rates approaching 90°/sec., with a payload in excess of 1000 lbs. in addition, fast responding shaft encoders permit a unique digital data recorder to print azimuth, elevation, and time on each frame of two 70 mm cameras running at 360 fps. The RADOT's were designed to provide metric and engineering sequential data on both launch and re-entry vehicles at the Kwajalein Test Site.