article · GPS Solutions · 2023

Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides

Cited by 12Open access

Abstract

Abstract Over the last decade, chip-scale atomic clocks (CSACs) have emerged as stable time and frequency references with small size, weight, and power (SWaP). While the short-term stability of these devices clearly outperforms other oscillators with similar power consumption, their stability over longer time intervals is notably limited by frequency noise. Such long-term deviations can effectively be compensated by disciplining the clock with respect to a stable time and frequency reference such as Coordinated Universal Time (UTC) or a time scale based on GNSS observations. In view of the limited accuracy of GPS pseudorange observations and broadcast ephemerides, the performance of GNSS-disciplined atomic clocks is commonly limited to the few-nanosecond level. For further improvement, this study combines the use of carrier phase-based precise-point-positioning (PPP) techniques and high-performance broadcast ephemerides to discipline the phase of a CSAC with respect to GNSS broadcast time. Making use of a dual-frequency, dual-constellation GPS/Galileo receiver, a sub-nanosecond time interval error with respect to a national UTC timing laboratory is demonstrated over time intervals from 1 s to several days.

Cite this paper

APA 7

Kunzi, F., & Montenbruck, O. (2023). Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides. GPS Solutions, 27(4). https://doi.org/10.1007/s10291-023-01496-4

MLA 9

Kunzi, Florian, and Oliver Montenbruck. “Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides.” GPS Solutions, vol. 27, no. 4, 2023, https://doi.org/10.1007/s10291-023-01496-4.

Chicago

Kunzi, Florian, and Oliver Montenbruck. 2023. “Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides.” GPS Solutions 27 (4). https://doi.org/10.1007/s10291-023-01496-4.

Harvard

Kunzi, F. and Montenbruck, O. (2023) ‘Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides’, GPS Solutions, 27(4). Available at: https://doi.org/10.1007/s10291-023-01496-4.

BibTeX

@article{kunzi2023precise,
  title = {{Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides}},
  author = {Kunzi, Florian and Montenbruck, Oliver},
  journal = {GPS Solutions},
  volume = {27},
  number = {4},
  year = {2023},
  doi = {10.1007/s10291-023-01496-4}
}

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