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: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

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May 2017	82	4	3	89
Jun 2017	60	6	5	71
Jul 2017	17	6	2	25
Aug 2017	9	6	0	15
Sep 2017	67	17	2	86
Oct 2017	20	9	1	30
Nov 2017	32	11	2	45
Dec 2017	15	8	0	23
Jan 2018	22	12	1	35
Feb 2018	20	6	4	30
Mar 2018	22	9	2	33
Apr 2018	13	7	1	21
May 2018	12	7	1	20
Jun 2018	16	8	1	25
Jul 2018	9	3	1	13
Aug 2018	16	6	1	23
Sep 2018	11	4	1	16
Oct 2018	10	3	2	15
Nov 2018	10	7	1	18
Dec 2018	10	5	0	15
Jan 2019	11	4	0	15
Feb 2019	14	5	0	19
Mar 2019	10	6	2	18
Apr 2019	9	5	0	14
May 2019	10	4	0	14
Jun 2019	8	8	1	17
Jul 2019	9	7	0	16
Aug 2019	7	3	0	10
Sep 2019	5	6	0	11
Oct 2019	10	12	2	24
Nov 2019	4	3	0	7
Dec 2019	6	7	1	14
Jan 2020	5	5	1	11
Feb 2020	9	9	0	18
Mar 2020	2	8	0	10
Apr 2020	2	4	0	6
May 2020	2	2	1	5
Jun 2020	32	33	1	66
Jul 2020	45	76	28	149
Aug 2020	5	4	1	10
Sep 2020	6	6	0	12
Oct 2020	5	6	2	13
Nov 2020	8	7	0	15
Dec 2020	9	6	0	15
Jan 2021	17	9	0	26
Feb 2021	6	9	0	15
Mar 2021	6	3	0	9
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May 2021	6	9	1	16
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Jul 2021	3	5	1	9
Aug 2021	8	4	0	12
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Oct 2021	6	30	0	36
Nov 2021	7	29	4	40
Dec 2021	10	10	1	21
Jan 2022	14	6	1	21
Feb 2022	10	4	2	16
Mar 2022	9	9	0	18
Apr 2022	6	10	1	17
May 2022	3	5	1	9
Jun 2022	10	2	1	13
Jul 2022	4	4	0	8
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Oct 2022	11	1	1	13
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Dec 2022	16	3	4	23
Jan 2023	5	7	2	14
Feb 2023	5	8	1	14
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Apr 2023	6	3	0	9
May 2023	16	8	5	29
Jun 2023	2	6	0	8
Jul 2023	10	4	3	17
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Oct 2023	7	3	1	11
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Jan 2024	4	6	0	10
Feb 2024	2	3	0	5
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Apr 2024	15	11	7	33
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Oct 2024	22	10	1	33
Nov 2024	10	5	0	15
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Jan 2025	4	8	1	13
Feb 2025	26	9	1	36
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Apr 2025	9	13	0	22
May 2025	22	6	3	31
Jun 2025	29	10	2	41
Jul 2025	12	13	2	27
Aug 2025	14	20	1	35
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Oct 2025	106	28	3	137
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Cumulative views and downloads (calculated since 17 Mar 2017)

Month	HTML	PDF	XML	Total
Mar 2017	77	14	6	97
Apr 2017	85	12	5	102
May 2017	82	4	3	89
Jun 2017	60	6	5	71
Jul 2017	17	6	2	25
Aug 2017	9	6	0	15
Sep 2017	67	17	2	86
Oct 2017	20	9	1	30
Nov 2017	32	11	2	45
Dec 2017	15	8	0	23
Jan 2018	22	12	1	35
Feb 2018	20	6	4	30
Mar 2018	22	9	2	33
Apr 2018	13	7	1	21
May 2018	12	7	1	20
Jun 2018	16	8	1	25
Jul 2018	9	3	1	13
Aug 2018	16	6	1	23
Sep 2018	11	4	1	16
Oct 2018	10	3	2	15
Nov 2018	10	7	1	18
Dec 2018	10	5	0	15
Jan 2019	11	4	0	15
Feb 2019	14	5	0	19
Mar 2019	10	6	2	18
Apr 2019	9	5	0	14
May 2019	10	4	0	14
Jun 2019	8	8	1	17
Jul 2019	9	7	0	16
Aug 2019	7	3	0	10
Sep 2019	5	6	0	11
Oct 2019	10	12	2	24
Nov 2019	4	3	0	7
Dec 2019	6	7	1	14
Jan 2020	5	5	1	11
Feb 2020	9	9	0	18
Mar 2020	2	8	0	10
Apr 2020	2	4	0	6
May 2020	2	2	1	5
Jun 2020	32	33	1	66
Jul 2020	45	76	28	149
Aug 2020	5	4	1	10
Sep 2020	6	6	0	12
Oct 2020	5	6	2	13
Nov 2020	8	7	0	15
Dec 2020	9	6	0	15
Jan 2021	17	9	0	26
Feb 2021	6	9	0	15
Mar 2021	6	3	0	9
Apr 2021	5	6	0	11
May 2021	6	9	1	16
Jun 2021	8	5	1	14
Jul 2021	3	5	1	9
Aug 2021	8	4	0	12
Sep 2021	10	8	0	18
Oct 2021	6	30	0	36
Nov 2021	7	29	4	40
Dec 2021	10	10	1	21
Jan 2022	14	6	1	21
Feb 2022	10	4	2	16
Mar 2022	9	9	0	18
Apr 2022	6	10	1	17
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Nov 2022	7	6	0	13
Dec 2022	16	3	4	23
Jan 2023	5	7	2	14
Feb 2023	5	8	1	14
Mar 2023	14	5	6	25
Apr 2023	6	3	0	9
May 2023	16	8	5	29
Jun 2023	2	6	0	8
Jul 2023	10	4	3	17
Aug 2023	7	6	1	14
Sep 2023	4	5	1	10
Oct 2023	7	3	1	11
Nov 2023	1	2	0	3
Dec 2023	15	6	4	25
Jan 2024	4	6	0	10
Feb 2024	2	3	0	5
Mar 2024	12	12	1	25
Apr 2024	15	11	7	33
May 2024	11	7	1	19
Jun 2024	28	8	2	38
Jul 2024	17	6	0	23
Aug 2024	24	7	1	32
Sep 2024	19	5	1	25
Oct 2024	22	10	1	33
Nov 2024	10	5	0	15
Dec 2024	14	6	2	22
Jan 2025	4	8	1	13
Feb 2025	26	9	1	36
Mar 2025	13	4	2	19
Apr 2025	9	13	0	22
May 2025	22	6	3	31
Jun 2025	29	10	2	41
Jul 2025	12	13	2	27
Aug 2025	14	20	1	35
Sep 2025	40	18	2	60
Oct 2025	106	28	3	137
Nov 2025	16	9	1	26

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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.


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