Near-Term Time Transfer Technologies and International Atomic Time (TAI)
NAVAL OBSERVATORY WASHINGTON DC
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While there are many forms of time-transfer, the most precise long-distance forms currently used for the generation of TAI and Coordinated Universal Time UTC involve either GPS or Two Way Satellite Time Transfer TWSTT. This paper will give a brief description of their current and future capabilities, with emphasis on their uncertainties. Some of these uncertainties are due to inherent modeling or receiver instabilities, while others can be reduced through temperature and humidity stabilization, electronic impedance matching, and multipath minimization. The residual time-transfer uncertainties directly affect the uncertainties in each individual laboratorys realization of UTC.
- Test Facilities, Equipment and Methods
- Navigation and Guidance