Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method
Abstract In Fennoscandia, the Glacial Isostatic Adjustment (GIA) causes intraplate deformations that affect the national static reference frames. The GNSS-determined velocities are important data for constraining the GIA models, which are necessary for maintaining the national reference frames. The...
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crspringernat:10.1007/s10291-021-01194-z 2023-05-15T16:12:03+02:00 Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method Lahtinen, Sonja Jivall, Lotti Häkli, Pasi Nordman, Maaria National Land Survey of Finland 2021 http://dx.doi.org/10.1007/s10291-021-01194-z https://link.springer.com/content/pdf/10.1007/s10291-021-01194-z.pdf https://link.springer.com/article/10.1007/s10291-021-01194-z/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY GPS Solutions volume 26, issue 1 ISSN 1080-5370 1521-1886 General Earth and Planetary Sciences journal-article 2021 crspringernat https://doi.org/10.1007/s10291-021-01194-z 2021-11-12T07:42:44Z Abstract In Fennoscandia, the Glacial Isostatic Adjustment (GIA) causes intraplate deformations that affect the national static reference frames. The GNSS-determined velocities are important data for constraining the GIA models, which are necessary for maintaining the national reference frames. The Nordic Geodetic Commission (NKG) has published a dense and consistent GNSS station velocity solution in 2019, and we present now an update of the solution covering additional 3.5 years of data. Undetected positional offsets are the main factor decreasing the accuracy of the velocity estimates. We developed a method for the semi-automatic offset detection to improve the quality of our solution. The results show that we could correctly detect 74% of the manually determined offsets, and the undetected offsets would have caused a median 0.1 mm/y bias in trend. The method pointed out some otherwise unnoticed offsets and will decrease the need for manual analysis in the future. The updated velocity solution especially improves the velocity estimates of the newly established stations and the quality of the velocity estimates in Baltic countries. The formal uncertainties estimated using the power-law plus white noise model were at a median of 0.06 and 0.15 mm/y for horizontal and vertical velocities, respectively. However, we concluded that the systematic velocity uncertainties due to the reference frame alignment were approximately at the same level. Article in Journal/Newspaper Fennoscandia Springer Nature (via Crossref) GPS Solutions 26 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
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English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Lahtinen, Sonja Jivall, Lotti Häkli, Pasi Nordman, Maaria Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
topic_facet |
General Earth and Planetary Sciences |
description |
Abstract In Fennoscandia, the Glacial Isostatic Adjustment (GIA) causes intraplate deformations that affect the national static reference frames. The GNSS-determined velocities are important data for constraining the GIA models, which are necessary for maintaining the national reference frames. The Nordic Geodetic Commission (NKG) has published a dense and consistent GNSS station velocity solution in 2019, and we present now an update of the solution covering additional 3.5 years of data. Undetected positional offsets are the main factor decreasing the accuracy of the velocity estimates. We developed a method for the semi-automatic offset detection to improve the quality of our solution. The results show that we could correctly detect 74% of the manually determined offsets, and the undetected offsets would have caused a median 0.1 mm/y bias in trend. The method pointed out some otherwise unnoticed offsets and will decrease the need for manual analysis in the future. The updated velocity solution especially improves the velocity estimates of the newly established stations and the quality of the velocity estimates in Baltic countries. The formal uncertainties estimated using the power-law plus white noise model were at a median of 0.06 and 0.15 mm/y for horizontal and vertical velocities, respectively. However, we concluded that the systematic velocity uncertainties due to the reference frame alignment were approximately at the same level. |
author2 |
National Land Survey of Finland |
format |
Article in Journal/Newspaper |
author |
Lahtinen, Sonja Jivall, Lotti Häkli, Pasi Nordman, Maaria |
author_facet |
Lahtinen, Sonja Jivall, Lotti Häkli, Pasi Nordman, Maaria |
author_sort |
Lahtinen, Sonja |
title |
Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
title_short |
Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
title_full |
Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
title_fullStr |
Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
title_full_unstemmed |
Updated GNSS velocity solution in the Nordic and Baltic countries with a semi-automatic offset detection method |
title_sort |
updated gnss velocity solution in the nordic and baltic countries with a semi-automatic offset detection method |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s10291-021-01194-z https://link.springer.com/content/pdf/10.1007/s10291-021-01194-z.pdf https://link.springer.com/article/10.1007/s10291-021-01194-z/fulltext.html |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
GPS Solutions volume 26, issue 1 ISSN 1080-5370 1521-1886 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s10291-021-01194-z |
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GPS Solutions |
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