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Passive utilization of the TWSTFT technique
RISE - Research Institutes of Sweden (2017-2019), Safety and Transport, Measurement Science and Technology.ORCID iD: 0000-0003-1710-6058
RISE - Research Institutes of Sweden (2017-2019), Safety and Transport, Measurement Science and Technology.
RISE - Research Institutes of Sweden (2017-2019), Safety and Transport, Measurement Science and Technology.ORCID iD: 0000-0002-5518-4607
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

As an active technique TWSTFT is limited in the number of concurrent users on the same communication channel. Using the transmissions of the reference network, passive users can observe the signals in a common view sense and by knowing the orbit of the relaying satellite, corrections describing the dynamic path delay can be used to estimate the clock difference between passive stations. Reliable orbit determination can be achieved using all the active measurements performed by the regular active users. For the EU/US network using Telesat Telstar 11N, the orbit estimation uncertainty is in the order of 1m for the area spanned by the contributing stations. The corresponding time uncertainty for a passive user is about 1 ns, slightly larger than achievable by active links. A passive use of TWSTFT may provide increased timing resiliency for a number of applications. The design of a passive ground station based on a SDR receiver is suggested.

Place, publisher, year, edition, pages
2018. p. 263-269
Keywords [en]
Orbits, Extraterrestrial measurements, Delays, Satellites, Real-time systems, Atmospheric measurements, Current measurement, TWSTFT, time transfer, orbit determination, passive approach, real-time, resiliency
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-34326DOI: 10.1109/EFTF.2018.8409046Scopus ID: 2-s2.0-85050723601OAI: oai:DiVA.org:ri-34326DiVA, id: diva2:1237075
Conference
2018 European Frequency and Time Forum (EFTF)
Available from: 2018-08-07 Created: 2018-08-07 Last updated: 2023-05-23Bibliographically approved

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Rieck, CarstenJaldehag, Kenneth

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CiteExportLink to record
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  • apa
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Output format
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