Detection of a New Large Free Core Nutation Phase Jump
We announce the detection of a new large jump in the phase of the free core nutation (FCN). This is only the second such large FCN phase jump in more than thirty years of FCN monitoring by means of a very long baseline interferometry (VLBI) technique. The new event was revealed and confirmed by anal...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/16/5960 |
| _version_ | 1797408008741847040 |
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| author | Zinovy Malkin Santiago Belda Sadegh Modiri |
| author_facet | Zinovy Malkin Santiago Belda Sadegh Modiri |
| author_sort | Zinovy Malkin |
| collection | DOAJ |
| description | We announce the detection of a new large jump in the phase of the free core nutation (FCN). This is only the second such large FCN phase jump in more than thirty years of FCN monitoring by means of a very long baseline interferometry (VLBI) technique. The new event was revealed and confirmed by analyzing two FCN models derived from a long-time series of VLBI observations. The jump started in 2021 and is expected to last until the late fall of 2022. The amplitude of the phase jump is expected to be approximately 3 rad, which is as much as 1.5 times larger than the first phase jump in 1999–2000. A connection of the new FCN phase jump with the recent geomagnetic jerk started in 2020 is suggested. |
| first_indexed | 2024-03-09T03:52:06Z |
| format | Article |
| id | doaj.art-08b6e8dff1db4188b693d55452d05c06 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T03:52:06Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-08b6e8dff1db4188b693d55452d05c062023-12-03T14:25:17ZengMDPI AGSensors1424-82202022-08-012216596010.3390/s22165960Detection of a New Large Free Core Nutation Phase JumpZinovy Malkin 0Santiago Belda1Sadegh Modiri 2Pulkovo Observatory, St. Petersburg 196140, RussiaUniversity of Alicante VLBI Analysis Centre (UAVAC), University of Alicante, 03080 Alicante, SpainDepartment Geodesy, Federal Agency for Cartography and Geodesy (BKG), 60322 Frankfurt am Main, GermanyWe announce the detection of a new large jump in the phase of the free core nutation (FCN). This is only the second such large FCN phase jump in more than thirty years of FCN monitoring by means of a very long baseline interferometry (VLBI) technique. The new event was revealed and confirmed by analyzing two FCN models derived from a long-time series of VLBI observations. The jump started in 2021 and is expected to last until the late fall of 2022. The amplitude of the phase jump is expected to be approximately 3 rad, which is as much as 1.5 times larger than the first phase jump in 1999–2000. A connection of the new FCN phase jump with the recent geomagnetic jerk started in 2020 is suggested.https://www.mdpi.com/1424-8220/22/16/5960Earth’s rotationcelestial pole motionfree core nutation (FCN)FCN phase variationsVLBI |
| spellingShingle | Zinovy Malkin Santiago Belda Sadegh Modiri Detection of a New Large Free Core Nutation Phase Jump Sensors Earth’s rotation celestial pole motion free core nutation (FCN) FCN phase variations VLBI |
| title | Detection of a New Large Free Core Nutation Phase Jump |
| title_full | Detection of a New Large Free Core Nutation Phase Jump |
| title_fullStr | Detection of a New Large Free Core Nutation Phase Jump |
| title_full_unstemmed | Detection of a New Large Free Core Nutation Phase Jump |
| title_short | Detection of a New Large Free Core Nutation Phase Jump |
| title_sort | detection of a new large free core nutation phase jump |
| topic | Earth’s rotation celestial pole motion free core nutation (FCN) FCN phase variations VLBI |
| url | https://www.mdpi.com/1424-8220/22/16/5960 |
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