Characterization of a 450 km baseline GPS carrier-phase link using an optical fiber link

Droste, Stefan; Grebing, Christian; Leute, J.; Raupach, S. M. F.; Matveev, A.; Hänsch, Theodor W.; Bauch, A.; Holzwarth, Ronald; Grosche, G.

doi:10.1088/1367-2630/17/8/083044

Cited by 25 publications

(10 citation statements)

References 22 publications

(41 reference statements)

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“…Free space time and frequency transfer can be realized using radiofrequency signals (of order 1-10 GHz) with well established techniques [83], and in the optical domain with lasers [84]. GNSS (Global Navigation Satellite Systems) [85,86,87,88,89] and TWSTFT (Two-Way Satellite Time and Frequency Transfer) [90,91,83,92,93] have been widely used for years to perform clock comparisons and establish international timescales such as TAI [56]. The ACES MWL (MicroWave Link) [94] is being developed in the frame of the ACES (Atomic Clocks Ensemble in Space) experiment [95,96].…”

Section: Frequency Transfer Techniquesmentioning

confidence: 99%

Chronometric Geodesy: Methods and Applications

Delva

Denker

Lion

2019

Fundamental Theories of Physics

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Section: Frequency Transfer Techniquesmentioning

confidence: 99%

Chronometric Geodesy: Methods and Applications

Delva

Denker

Lion

2019

Fundamental Theories of Physics

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“…Much better performance is possible where direct fibre optic connections are feasible. The current situation on time and frequency transfer has been nicely summarized in recent references [2][3][4]. Most importantly, the GNSS signals are available essentially anywhere on the Earth, and there are more to come on the near-term horizon from GALILEO and BEIDOU.…”

Section: Time and Frequency Distributionmentioning

confidence: 99%

Optical atomic phase reference and timing

Hollberg

Cornell

Abdelrahmann

2017

Phil. Trans. R. Soc. A.

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Atomic clocks based on laser-cooled atoms have made tremendous advances in both accuracy and stability. However, advanced clocks have not found their way into widespread use because there has been little need for such high performance in real-world/commercial applications. The drive in the commercial world favours smaller, lower-power, more robust compact atomic clocks that function well in real-world non-laboratory environments. Although the high-performance atomic frequency references are useful to test Einstein's special relativity more precisely, there are not compelling scientific arguments to expect a breakdown in special relativity. On the other hand, the dynamics of gravity, evidenced by the recent spectacular results in experimental detection of gravity waves by the LIGO Scientific Collaboration, shows dramatically that there is new physics to be seen and understood in space-time science. Those systems require strain measurements at less than or equal to 10 As we discuss here, cold atom optical frequency references are still many orders of magnitude away from the frequency stability that should be achievable with narrow-linewidth quantum transitions and large numbers of very cold atoms, and they may be able to achieve levels of phase stability, Δ/ ≤ 10, that could make an important impact in gravity wave science.This article is part of the themed issue 'Quantum technology for the 21st century'.

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“…Recent papers provide useful comparisons of time transfer by optical fibers compared to GPS carrier phase and TWSTFT. 39,47 The potential advantages of free--space optical methods for time and frequency transfer between ground and space have long been recognized. Pioneering work for a precise optical time transfer from ground to space is done as part of the the ESA T2L2 mission.…”

Section: Context and Related Systems Testing General Relativity And Fmentioning

confidence: 99%

Space-time reference with an optical link

Berceau

Taylor

Kahn

et al. 2016

Class. Quantum Grav.

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We describe a method for realizing a high performance Space--Time Reference (STR) using a stable atomic clock in a precisely defined orbit and synchronizing the orbiting clock to high--accuracy atomic clocks on the ground. The synchronization would be accomplished using a two--way lasercom link between ground and space. The basic concept is to take advantage of the highest--performance cold--atom atomic clocks at national standards laboratories on the ground and to transfer that performance to an orbiting clock that has good stability and that serves as a "frequency--flywheel" over time--scales of a few hours. The two--way lasercom link would also provide precise range information and thus precise orbit determination (POD). With a well-defined orbit and a synchronized clock, the satellite could serve as a high--accuracy Space--Time Reference, providing precise time worldwide, a valuable reference frame for geodesy, and independent high--accuracy measurements of GNSS clocks. With reasonable assumptions, a practical system would be able to deliver picosecond timing worldwide and millimeter orbit determination.

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Characterization of a 450 km baseline GPS carrier-phase link using an optical fiber link

Cited by 25 publications

References 22 publications

Chronometric Geodesy: Methods and Applications

Chronometric Geodesy: Methods and Applications

Optical atomic phase reference and timing

Space-time reference with an optical link

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