Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica
We examine the electromagnetic coupling of aGPS antennamonument pair in terms of its simulated affecton long GPS coordinate time series. We focus on the Earthand Polar Observing System (POLENET) monument designwidely deployed in Antarctica and Greenland in projectsinterested particularly in vertical...
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ftunivtasecite:oai:ecite.utas.edu.au:89659 2023-05-15T13:37:23+02:00 Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica King, MA Bevis, M Wilson, T Johns, B Blume, F 2012 https://doi.org/10.1007/s00190-011-0491-x http://ecite.utas.edu.au/89659 en eng Springer-Verlag http://dx.doi.org/10.1007/s00190-011-0491-x King, MA and Bevis, M and Wilson, T and Johns, B and Blume, F, Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica, Journal of Geodesy, 86, (1) pp. 53-63. ISSN 0949-7714 (2012) [Refereed Article] http://ecite.utas.edu.au/89659 Engineering Geomatic Engineering Geodesy Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1007/s00190-011-0491-x 2019-12-13T21:53:10Z We examine the electromagnetic coupling of aGPS antennamonument pair in terms of its simulated affecton long GPS coordinate time series. We focus on the Earthand Polar Observing System (POLENET) monument designwidely deployed in Antarctica and Greenland in projectsinterested particularly in vertical velocities. We base ourtests on an absolute robot calibration that included the top∼0.15 m of the monument and use simulations to assessits effect on site coordinate time series at eight representativePOLENET sites in Antarctica over the period 2000.02011.0. We show that the neglect of this calibration wouldintroduce mean coordinate bias, and most importantly forvelocity estimation, coordinate noise which is highly sensitiveto observation geometry and hence site location andobservation period. Considering only sub-periods longer than2.5 years, we show vertical site velocities may be biased byup to 0.4 mm/year, and biases up to 0.2 mm/year may persistfor observation spans of 8 years. Changing between uniformand elevation-dependent observation weighting altersthe time series but does not remove the velocity biases, nordoes ambiguity fixing. The effect on the horizontal coordinatesis negligible. The ambiguities fixed series spectrashownoise between flicker and randomwalk with near-whitenoise at the highest frequencies, with mean spectral indices(frequencies <20 cycles per year) of approximately −1.3(uniform weighting) and −1.4 (elevation-dependent weighting).While the results are likely highly monument specific,they highlight the importance of accounting for monumenteffects when analysing vertical coordinate time series andvelocities for the highest precision and accuracy geophysicalstudies. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Greenland eCite UTAS (University of Tasmania) Greenland The Monument ENVELOPE(162.250,162.250,-72.583,-72.583) Journal of Geodesy 86 1 53 63 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Engineering Geomatic Engineering Geodesy |
spellingShingle |
Engineering Geomatic Engineering Geodesy King, MA Bevis, M Wilson, T Johns, B Blume, F Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
topic_facet |
Engineering Geomatic Engineering Geodesy |
description |
We examine the electromagnetic coupling of aGPS antennamonument pair in terms of its simulated affecton long GPS coordinate time series. We focus on the Earthand Polar Observing System (POLENET) monument designwidely deployed in Antarctica and Greenland in projectsinterested particularly in vertical velocities. We base ourtests on an absolute robot calibration that included the top∼0.15 m of the monument and use simulations to assessits effect on site coordinate time series at eight representativePOLENET sites in Antarctica over the period 2000.02011.0. We show that the neglect of this calibration wouldintroduce mean coordinate bias, and most importantly forvelocity estimation, coordinate noise which is highly sensitiveto observation geometry and hence site location andobservation period. Considering only sub-periods longer than2.5 years, we show vertical site velocities may be biased byup to 0.4 mm/year, and biases up to 0.2 mm/year may persistfor observation spans of 8 years. Changing between uniformand elevation-dependent observation weighting altersthe time series but does not remove the velocity biases, nordoes ambiguity fixing. The effect on the horizontal coordinatesis negligible. The ambiguities fixed series spectrashownoise between flicker and randomwalk with near-whitenoise at the highest frequencies, with mean spectral indices(frequencies <20 cycles per year) of approximately −1.3(uniform weighting) and −1.4 (elevation-dependent weighting).While the results are likely highly monument specific,they highlight the importance of accounting for monumenteffects when analysing vertical coordinate time series andvelocities for the highest precision and accuracy geophysicalstudies. |
format |
Article in Journal/Newspaper |
author |
King, MA Bevis, M Wilson, T Johns, B Blume, F |
author_facet |
King, MA Bevis, M Wilson, T Johns, B Blume, F |
author_sort |
King, MA |
title |
Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
title_short |
Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
title_full |
Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
title_fullStr |
Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
title_full_unstemmed |
Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica |
title_sort |
monument-antenna effects on gps coordinate time series with application to vertical rates in antarctica |
publisher |
Springer-Verlag |
publishDate |
2012 |
url |
https://doi.org/10.1007/s00190-011-0491-x http://ecite.utas.edu.au/89659 |
long_lat |
ENVELOPE(162.250,162.250,-72.583,-72.583) |
geographic |
Greenland The Monument |
geographic_facet |
Greenland The Monument |
genre |
Antarc* Antarctica Antarctica Journal Greenland |
genre_facet |
Antarc* Antarctica Antarctica Journal Greenland |
op_relation |
http://dx.doi.org/10.1007/s00190-011-0491-x King, MA and Bevis, M and Wilson, T and Johns, B and Blume, F, Monument-antenna effects on GPS coordinate time series with application to vertical rates in Antarctica, Journal of Geodesy, 86, (1) pp. 53-63. ISSN 0949-7714 (2012) [Refereed Article] http://ecite.utas.edu.au/89659 |
op_doi |
https://doi.org/10.1007/s00190-011-0491-x |
container_title |
Journal of Geodesy |
container_volume |
86 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
63 |
_version_ |
1766091146346364928 |