Articles | Volume 6, issue 2
Geosci. Instrum. Method. Data Syst., 6, 311–317, 2017

Special issue: The Earth’s magnetic field: measurements, data, and applications...

Geosci. Instrum. Method. Data Syst., 6, 311–317, 2017

Research article 01 Sep 2017

Research article | 01 Sep 2017

Time-stamp correction of magnetic observatory data acquired during unavailability of time-synchronization services

Pierdavide Coïsson et al.

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Cited articles

Changjiang, X. and Zhang, S.: The Analysis of Baselines for Different Fluxgate Theodolites of Geomagnetic Observatories, Data Science Journal, 10, IAGA159–IAGA168,, 2011.
Chulliat, A., Savary, J., Telali, K., and Lalanne, X.: Acquisition of 1-second data in IPGP magnetic observatories, in: Proceedings of the XIIIth IAGA Workshop on Geomagnetic Observatory Instruments, Data Acquisition, and Processing, edited by: Love, J. J., Open-File Report 2009–1226, 54–59, U.S. Geological Survey, 54–59, available at: (last access: 9 August 2017), 2009.
INTERMAGNET Operations Committee and Executive Council: INTERMAGNET Technical Reference Manual, 4.6th Edn., available at: (last access: 9 August 2017), 2012.
Love, J. J. and Chulliat, A.: An International Network of Magnetic Observatories, Eos, Transactions American Geophysical Union, 94, 373–374,, 2013.
Peltier, A. and Chulliat, A.: On the feasibility of promptly producing quasi-definitive magnetic observatory data, Earth Planets Space, 62, e5–e8,, 2010.
Short summary
Data loggers of magnetic observatories use GPS receivers to provide accurate time stamping of recorded data. Typical sampling rate is 1 s. A failure of the GPS receiver can result in erroneous time stamps. The observatory of Lanzhou, China, accumulated a lag of 28 s over 1 year. Using magnetic data recorded at other locations in a radius of 3000 km it was possible to estimate the diurnal lag and correct the time tamps to produce reliable 1 min averages of magnetic data.