Mon Aug 24, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Kawaguchi, Junichiro, Nishimoto, Shingo, and Komachi, Saki, 2026. Consolidated Simultaneous Range Measurement and Clock Synchronization. Journal of the Astronautical Sciences, 73(4):57, doi:10.1007/s40295-026-00594-y.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2026JAnSc..73...57K,
author = {{Kawaguchi}, Junichiro and {Nishimoto}, Shingo and {Komachi}, Saki},
title = "{Consolidated Simultaneous Range Measurement and Clock Synchronization}",
journal = {Journal of the Astronautical Sciences},
keywords = {Ranging, Clock synchronization, Time transfer, Carrier phase tracking, Positioning, PNT, GNSS},
year = 2026,
month = jun,
volume = {73},
number = {4},
eid = {57},
pages = {57},
abstract = "{The Asynchronous One-Way Range (AOWR) scheme was developed by the
authors, and the results of the field tests conducted to date
have been reported. It works in a pair of transceivers. The
Gravity Recovery and Climate Experiment (GRACE) mission adopted
the Dual One-Way Range (DOWR) scheme to measure distance by
referencing the phase difference, while clock synchronization is
performed independently through the code correlation method
known as Two-Way Time Transfer (TWTT). The clock synchronization
has been conceived distinct from the range measurement. However,
the mutual phase difference data inherently contain not only
range information but also clock-difference information. This
paper provides an overview of how the single AOWR scheme
operates in real-time by integrating a simultaneous range
measurement method with clock synchronization. This paper
discusses how relativity is treated in the AOWR scheme enabling
the simultaneous measurement through symmetric formulation,
taking advantage of the duality. The symmetric formulation
developed in this paper accounts strictly for special and
general relativistic time dilation. While the current AOWR
scheme relies on code correlation, which exhibits significant
fluctuations and reduced accuracy, the paper further
incorporates a mutual carrier-phase tracking scheme into the
AOWR framework. The new estimator yields significantly more
stable and accurate range and clock-difference data. The paper
presents how the effects of tropospheric and ionospheric delays
are effectively mitigated for the AOWR scheme in the
configurations that include a ground station. Preliminary
hardware-in-the-loop tests have been conducted, and their
results are presented.}",
doi = {10.1007/s40295-026-00594-y},
adsurl = {https://ui.adsabs.harvard.edu/abs/2026JAnSc..73...57K},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Aug 24, F. Flechtner