Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica
For several decades relative gravimetric measurements have allowed the precise observation of harmonic signals related to Earth body and ocean tides. More recently, GPS data have been shown to be precise enough to allow the determination of antenna displacements at tidal frequencies in three dimensi...
Published in: | Journal of Geodynamics |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
x
2006
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.jog.2005.08.019 http://ecite.utas.edu.au/81911 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:81911 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:81911 2023-05-15T14:02:31+02:00 Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica King, MA 2006 https://doi.org/10.1016/j.jog.2005.08.019 http://ecite.utas.edu.au/81911 en eng x http://dx.doi.org/10.1016/j.jog.2005.08.019 King, MA, Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica, Journal of Geodynamics, 41, (1-3) pp. 77-86. ISSN 0264-3707 (2006) [Refereed Article] http://ecite.utas.edu.au/81911 Earth Sciences Physical Geography and Environmental Geoscience Physical Geography and Environmental Geoscience not elsewhere classified Refereed Article PeerReviewed 2006 ftunivtasecite https://doi.org/10.1016/j.jog.2005.08.019 2019-12-13T21:46:56Z For several decades relative gravimetric measurements have allowed the precise observation of harmonic signals related to Earth body and ocean tides. More recently, GPS data have been shown to be precise enough to allow the determination of antenna displacements at tidal frequencies in three dimensions. In this paper I focus on a comparison between 'kinematic' and 'static' tidal displacement estimation techniques using GPS data between 1998.5 and 2003.5 from South Pole (AMUN). The GPS estimates are compared with modelled values using the TPXO.6 and FES99 numerical tide models which themselves are found to be in agreement at the 1/100 mm level except for O1 and N2. The kinematic estimates are of lower accuracy to the static estimates and the height time series is dominated by non-tidal errors. The best resolved frequencies in the kinematic analysis are solar-related constituents, suggesting the presence of GPS systematic biases. The static analysis agrees with the model estimates, generally at the sub-mm level, with larger errors evident at S2, K1 and K2 frequencies. A time-variable behaviour of K2 is demonstrated. After combination of all daily data, high correlations (0.7-0.9) are evident between north and east components of each constituent, whilst the remainder of the correlations are less than 0.06. These correlations alter with site latitude and point to the source of the correlations being related to the non-integer ambiguities in the daily GPS estimates which are known to introduce correlations between horizontal and vertical site coordinate components and also change with site latitude. Fixing carrier phase ambiguities to integers may therefore increase the precision of harmonic parameter estimates using GPS. 2005 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal South pole South pole eCite UTAS (University of Tasmania) South Pole Journal of Geodynamics 41 1-3 77 86 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Physical Geography and Environmental Geoscience not elsewhere classified |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Physical Geography and Environmental Geoscience not elsewhere classified King, MA Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Physical Geography and Environmental Geoscience not elsewhere classified |
description |
For several decades relative gravimetric measurements have allowed the precise observation of harmonic signals related to Earth body and ocean tides. More recently, GPS data have been shown to be precise enough to allow the determination of antenna displacements at tidal frequencies in three dimensions. In this paper I focus on a comparison between 'kinematic' and 'static' tidal displacement estimation techniques using GPS data between 1998.5 and 2003.5 from South Pole (AMUN). The GPS estimates are compared with modelled values using the TPXO.6 and FES99 numerical tide models which themselves are found to be in agreement at the 1/100 mm level except for O1 and N2. The kinematic estimates are of lower accuracy to the static estimates and the height time series is dominated by non-tidal errors. The best resolved frequencies in the kinematic analysis are solar-related constituents, suggesting the presence of GPS systematic biases. The static analysis agrees with the model estimates, generally at the sub-mm level, with larger errors evident at S2, K1 and K2 frequencies. A time-variable behaviour of K2 is demonstrated. After combination of all daily data, high correlations (0.7-0.9) are evident between north and east components of each constituent, whilst the remainder of the correlations are less than 0.06. These correlations alter with site latitude and point to the source of the correlations being related to the non-integer ambiguities in the daily GPS estimates which are known to introduce correlations between horizontal and vertical site coordinate components and also change with site latitude. Fixing carrier phase ambiguities to integers may therefore increase the precision of harmonic parameter estimates using GPS. 2005 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
King, MA |
author_facet |
King, MA |
author_sort |
King, MA |
title |
Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
title_short |
Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
title_full |
Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
title_fullStr |
Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
title_full_unstemmed |
Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica |
title_sort |
kinematic and static gps techniques for estimating tidal displacements with application to antarctica |
publisher |
x |
publishDate |
2006 |
url |
https://doi.org/10.1016/j.jog.2005.08.019 http://ecite.utas.edu.au/81911 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Antarc* Antarctica Antarctica Journal South pole South pole |
genre_facet |
Antarc* Antarctica Antarctica Journal South pole South pole |
op_relation |
http://dx.doi.org/10.1016/j.jog.2005.08.019 King, MA, Kinematic and static GPS techniques for estimating tidal displacements with application to Antarctica, Journal of Geodynamics, 41, (1-3) pp. 77-86. ISSN 0264-3707 (2006) [Refereed Article] http://ecite.utas.edu.au/81911 |
op_doi |
https://doi.org/10.1016/j.jog.2005.08.019 |
container_title |
Journal of Geodynamics |
container_volume |
41 |
container_issue |
1-3 |
container_start_page |
77 |
op_container_end_page |
86 |
_version_ |
1766272815321841664 |