Articles | Volume 6, issue 2
Geosci. Instrum. Method. Data Syst., 6, 311–317, 2017
https://doi.org/10.5194/gi-6-311-2017

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

Geosci. Instrum. Method. Data Syst., 6, 311–317, 2017
https://doi.org/10.5194/gi-6-311-2017

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, https://doi.org/10.2481/dsj.IAGA-23, 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: https://pubs.er.usgs.gov/publication/ofr20091226 (last access: 9 August 2017), 2009.
INTERMAGNET Operations Committee and Executive Council: INTERMAGNET Technical Reference Manual, 4.6th Edn., available at: http://www.intermagnet.org/publication-software/technicalsoft-eng.php (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, https://doi.org/10.1002/2013EO420001, 2013.
Peltier, A. and Chulliat, A.: On the feasibility of promptly producing quasi-definitive magnetic observatory data, Earth Planets Space, 62, e5–e8, https://doi.org/10.5047/eps.2010.02.002, 2010.
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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.