Detection of abrupt baseline length changes using cumulative sums
Dynamic processes are usually monitored by collecting a time series of observations, which is then analysed in order to detect any motion or non-standard behaviour. Geodetic examples include the monitoring of dams, bridges, high-rise buildings, landslides, volcanoes and tectonic motion. The cumulati...
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Walter de Gruyter GmbH & Co. KG
2009
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Online Access: | https://doi.org/10.1515/JAG.2009.010 http://ecite.utas.edu.au/57433 |
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ftunivtasecite:oai:ecite.utas.edu.au:57433 2023-05-15T13:22:07+02:00 Detection of abrupt baseline length changes using cumulative sums Janssen, V 2009 application/pdf https://doi.org/10.1515/JAG.2009.010 http://ecite.utas.edu.au/57433 en eng Walter de Gruyter GmbH & Co. KG http://ecite.utas.edu.au/57433/1/Janssen_JAG_2009_author_version.pdf http://dx.doi.org/10.1515/JAG.2009.010, /June/2009 Janssen, V, Detection of abrupt baseline length changes using cumulative sums, Journal of Applied Geodesy, 3, (2) pp. 89-96. ISSN 1862-9016 (2009) [Refereed Article] http://ecite.utas.edu.au/57433 Engineering Geomatic Engineering Geodesy Refereed Article PeerReviewed 2009 ftunivtasecite https://doi.org/10.1515/JAG.2009.010 2019-12-13T21:29:27Z Dynamic processes are usually monitored by collecting a time series of observations, which is then analysed in order to detect any motion or non-standard behaviour. Geodetic examples include the monitoring of dams, bridges, high-rise buildings, landslides, volcanoes and tectonic motion. The cumulative sum (CUSUM) test is recognised as a popular means to detect changes in the mean and/or the standard deviation of a time series and has been applied to various monitoring tasks. This paper briefly describes the CUSUM technique and how it can be utilised for the detection of small baseline length changes by differencing two perpendicular baselines sharing a common site. A simulation is carried out in order to investigate the expected behaviour of the resulting CUSUM charts for a variety of typical deformation monitoring scenarios. This simulation shows that using first differences (between successive epochs) as input, rather than the original baseline lengths, produces clear peaks or jumps in the differenced CUSUM time series when a sudden change in baseline length occurs. These findings are validated by analysing several GPS baseline pairs of a network deployed to monitor the propagation of an active ice shelf rift on the Amery Ice Shelf, East Antarctica. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica Journal of Applied Geodesy 3 2 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Engineering Geomatic Engineering Geodesy |
spellingShingle |
Engineering Geomatic Engineering Geodesy Janssen, V Detection of abrupt baseline length changes using cumulative sums |
topic_facet |
Engineering Geomatic Engineering Geodesy |
description |
Dynamic processes are usually monitored by collecting a time series of observations, which is then analysed in order to detect any motion or non-standard behaviour. Geodetic examples include the monitoring of dams, bridges, high-rise buildings, landslides, volcanoes and tectonic motion. The cumulative sum (CUSUM) test is recognised as a popular means to detect changes in the mean and/or the standard deviation of a time series and has been applied to various monitoring tasks. This paper briefly describes the CUSUM technique and how it can be utilised for the detection of small baseline length changes by differencing two perpendicular baselines sharing a common site. A simulation is carried out in order to investigate the expected behaviour of the resulting CUSUM charts for a variety of typical deformation monitoring scenarios. This simulation shows that using first differences (between successive epochs) as input, rather than the original baseline lengths, produces clear peaks or jumps in the differenced CUSUM time series when a sudden change in baseline length occurs. These findings are validated by analysing several GPS baseline pairs of a network deployed to monitor the propagation of an active ice shelf rift on the Amery Ice Shelf, East Antarctica. |
format |
Article in Journal/Newspaper |
author |
Janssen, V |
author_facet |
Janssen, V |
author_sort |
Janssen, V |
title |
Detection of abrupt baseline length changes using cumulative sums |
title_short |
Detection of abrupt baseline length changes using cumulative sums |
title_full |
Detection of abrupt baseline length changes using cumulative sums |
title_fullStr |
Detection of abrupt baseline length changes using cumulative sums |
title_full_unstemmed |
Detection of abrupt baseline length changes using cumulative sums |
title_sort |
detection of abrupt baseline length changes using cumulative sums |
publisher |
Walter de Gruyter GmbH & Co. KG |
publishDate |
2009 |
url |
https://doi.org/10.1515/JAG.2009.010 http://ecite.utas.edu.au/57433 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf East Antarctica |
geographic_facet |
Amery Amery Ice Shelf East Antarctica |
genre |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
genre_facet |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
op_relation |
http://ecite.utas.edu.au/57433/1/Janssen_JAG_2009_author_version.pdf http://dx.doi.org/10.1515/JAG.2009.010, /June/2009 Janssen, V, Detection of abrupt baseline length changes using cumulative sums, Journal of Applied Geodesy, 3, (2) pp. 89-96. ISSN 1862-9016 (2009) [Refereed Article] http://ecite.utas.edu.au/57433 |
op_doi |
https://doi.org/10.1515/JAG.2009.010 |
container_title |
Journal of Applied Geodesy |
container_volume |
3 |
container_issue |
2 |
_version_ |
1766363357070229504 |