GEE - WWII Hyperbolic Navigation System скачать в хорошем качестве

GEE - WWII Hyperbolic Navigation System

GEE is actually a short range (250 mile) hyperbolic curve navigation system, same principal as LORAN. Measures difference in time of arrival of radio pulses transmitted exactly at the same time from two towers about 70 miles apart. Measurements in micro seconds (millionths of a second). Oscilloscope shows relative timing of the two radio signals and is displayed on a Cathode Ray Tube. Places aircraft or ship on a hyperbolic curve. Two separate towers transmit a second signal providing a position fix where colored hyperbolic curves cross. Time required 15 seconds. Accuracy 25 feet at sea level. Two traces shown on the CRT permit landing an aircraft in a pea soup English fog. The GEE box is user friendly, easy to operate, and was used very effectively by both the RAF, USAAF and Navy. The night of D-Day would have been a disaster of collisions in the channel and the air without GEE.