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

Coïsson, Pierdavide; Telali, Kader; Heumez, Benoit; Lesur, Vincent; Lalanne, Xavier; Xin, Chang Jiang

doi:https://doi.org/10.5194/gi-6-311-2017

Articles | Volume 6, issue 2

https://doi.org/10.5194/gi-6-311-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

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

https://doi.org/10.5194/gi-6-311-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 6, issue 2

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, Kader Telali, Benoit Heumez, Vincent Lesur, Xavier Lalanne, and Chang Jiang Xin

Supplement

https://doi.org/10.5194/gi-6-311-2017-supplement

Data sets

Magnetic observatory data Bureau Central de Magnetisme Terrestre (BCMT) https://doi.org/10.18715/BCMT.MAG.DEF

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.