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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Carrier-phase time transfer
1Dept. of Aerosp. Eng. Sci., Colorado Univ., Boulder, CO.
Summary
We developed a new GPS carrier-phase time transfer method. This technique offers significantly higher precision than current GPS systems, improving atomic clock synchronization.
Area of Science:
- Geodesy
- Metrology
- Satellite Navigation
Background:
- Current Global Positioning System (GPS) time transfer relies on code-based measurements.
- Existing methods have limitations in precision and accuracy for advanced synchronization needs.
Purpose of the Study:
- To introduce and evaluate a novel time transfer method utilizing GPS carrier-phase observations.
- To assess the precision and stability of GPS carrier-phase time transfer compared to existing techniques.
Main Methods:
- Connected atomic clocks to geodetic GPS receivers.
- Utilized GPS carrier-phase observations for time transfer at 6-minute intervals.
- Compared results with GPS common view and two-way satellite time transfer.
Main Results:
- GPS carrier-phase time transfer demonstrated over an order of magnitude improvement in precision.
- Measurements agreed with two-way satellite time transfer over a 2400 km baseline.
- Achieved a stability of 100 picoseconds, yielding a frequency uncertainty of ~2x10⁻¹⁵.
Conclusions:
- GPS carrier-phase time transfer is a highly precise and stable method for synchronizing atomic clocks.
- This technique offers a significant advancement over traditional GPS code-based time transfer.
- Potential applications in geodesy, telecommunications, and fundamental physics research.
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