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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Latest update: 24 Oct 2021
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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.