2014/03/13 by Miho Fujieda, M Fujieda, D Piester +9 · 98 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Baseline (sea) #Cold Atom Physics and Bose-Einstein Condensates #Compensation (psychology) #Computer science #Environmental science #Geodesy #Geography #Geology #Global Positioning System #Ionosphere #Phase (matter) #Physics #Remote sensing #Satellite #Telecommunications #Time transfer #physics.atom-ph #physics.ins-det
paper · pdf · doi:10.1088/0026-1394/51/3/253
published in Metrologia 51(3), 253-262 (IOP Publishing)
arxiv created 2014/03/13 · openalex publication_date 2014/05/28 · arxiv updated 2014/07/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we report that carrier-phase two-way satellite time and frequency transfer (TWSTFT) was successfully demonstrated over a very long baseline of 9000 km, established between the National Institute of Information and Communications Technology (NICT) and the Physikalisch-Technische Bundesanstalt (PTB). We verified that the carrier-phase TWSTFT (TWCP) result agreed with those obtained by conventional TWSTFT and GPS carrier-phase (GPSCP) techniques. Moreover, a much improved short-term instability for frequency transfer of 2 × 10 −13 at 1 s was achieved, which is at the same level as previously confirmed over a shorter baseline within Japan. The precision achieved was so high that the effects of ionospheric delay became significant; they are ignored in conventional TWSTFT even over a long link. We compensated for these effects using ionospheric delays computed from regional vertical total electron content maps. The agreement between the TWCP and GPSCP results was improved because of this compensation.