Global Positioning System (GPS) Analysis

ARGN GPS Station Coordinate Time Series

The following GPS coordinate time series have been derived using continuous GPS observations from the Australian Regional GPS Network (ARGN) and the International GPS Service (IGS) stations shown on this gif_48k world map image as red dots, located in the Australian and the Australian-Antarctic region. The GPS coordinate time series have been computed using the ARGN data set from late 1995 to the present.

The GPS solutions used in this time series analysis have previously been submitted to the IGS as part of Geoscience Australia's contribution to the IGS as an IGS Regional Network Associative Analysis Centre (RNAAC). The time series has been aligned to the International Terrestrial Reference Frame 2000 (ITRF2000) using the latest available IGS combined cumulative solution.

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ARGN GPS time series

• Download the latest ARGN GPS time series [PDF_3.2Mb] (1996 to present, 1995 data onwards is currently subject to re-analysis). Summary follows:
• This combined ARGN GPS solution has been aligned to International Terrestrial Reference Frame 2000 (ITRF2000) using the latest available IGS combined cumulative solution. The reference epoch for all station coordinates is 1 Jan 2000.
• Error bars are 1 sigma. All variance-covariances have been re-scaled to better reflect actual precision.
• Each solution 'circle' represents a weekly combined solution ie seven daily solutions. Outliers are not shown on plots.
• The tectonic velocities of some stations with less than 6 months of solutions are not estimated and are constrained to 0.0 ± 0.1mm/yr.
• For the purposes of these time series, GPS stations in close proximity have NOT been constrained by local terrestrial tie information or had their tectonic velocities constrained together.
• Plots marked 'GPS-GLONASS receiver' were derived using only the GPS data from a GPS-GLONASS capable receiver.
• Please note the scale difference between the vertical and horizontal components.

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SPSLCMP GPS Station Coordinate Time Series

• Download the latest South Pacific Sea Level & Climate Monitoring (SPSLCMP) project - GPS time series plots (2001 to 2005) [PDF_610k]. Summary follows:
• This combined SPSLCMP GPS solution has been aligned to the International Terrestrial Reference Frame 2000 (ITRF2000).
• Error bars are 1 sigma. All variance-covariances have been re-scaled to better reflect actual precision.
• Each solution 'circle' represents a daily solution. Outliers are not shown on plots.

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Tectonic Motion Maps

The "Australian Tectonic Motion" image shows Geoscience Australia site velocities (and 95% error ellipses) in red at 50mm/yr computed from ARGN GPS. Select this image for larger gif_46k.

The "Antarctic Tectonic Motion" image shows Geoscience Australia site velocities (and 95% error ellipses) in red at 10mm/yr computed from ARGN GPS. Select this image for larger gif_46k.

Australian Tectonic Motion

Antarctic Tectonic Motion

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