SUMMARY OF THE FLIGHT PERFORMANCE OF THE NRL MARK I AND MARK II OMEGA AIRCRAFT RECEIVERS.
NAVAL RESEARCH LAB WASHINGTON D C
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Omega is a very-low-frequency radio navigation system which is characterized by very-long-range capability and relatively high accuracy. The performance study results indicate that the use of the Omega navigation system for aircraft is entirely practical. The use of automatic velocity-aiding and automatic dead reckoning in the Mark II receiver resulted in considerable improvement over the operation of the Mark I. The velocity -aiding inputs from the true air speed and heading instruments of the aircraft enable the receiver servo to restrict operation to the narrow bandwidth necessary to correct the velocity-aiding inputs and to automatically dead reckon in high noise conditions. The Mark II operates on either hyperbolic or circular coordinates. The repeatability of 35 fixes during five evaluation flights over a period of one month was 14 fixes within one-half mile, 20 fixes within one mile and one fix slightly less than two miles. In strong signal areas, i.e., the Carribean Hawaii--3 kilowatts kw radiated, 4300 nm range Criggion, Wales--a temporary station, 0.4 kw radiated, 3600 nm range and Forestport--0.2 kw radiated, 1300 nm range navigation is continuous and precise. Author
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