Test and Evaluation of a System for Precise Time-Dissemination Using DME (VORTAC) Synchronization.
Final rept. Jul-Nov 72,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY NJ
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The report covers the test and evaluation of an experimental system designed to provide precise time to aircraft via a DME Distance Measuring equipment VORTAC ground station modified to use a cesium-beam atomic clock for a time base. Data acquired from a flight test at NAFEC demonstrated the feasibility of this time-dissemination concept for application in timefrequency collision avoidance systems. The standard deviation of time-dissemination error was found to be 0.47 microseconds. DME one-way ranging capability was also demonstrated, wherein ranging accuracy of a modified airborne DME operated one-way averaged 0.1-nmi difference over that of an unmodified airborne DME in conventional two-way operation. Author
- Air Navigation and Guidance