The majority of GeoNet's ground deformation data is collected continuously using GNSS (commonly referred to at GPS) receivers and antennas.
GPS/GNSS receivers determine very precisely positions on the surface of the earth. We compute a daily position for each of our stations so we can track the deformation caused by the interaction of the Australian and Pacific tectonic plates. This is our collection of GPS/GNSS-related data resources and tools.
The coordinates and their formal uncertainties are extracted during the GLOBK run from the combined daily solution files, and converted to (east, north, up) displacement in millimetres with respect to an a priori position and epoch in the ITRF2008 realisation.
The resulting time series have no adjustments made to them, so they may, for example, contain offsets due to earthquakes, offsets due to equipment changes at individual sites, and seasonal (annual and semi-annual) signals due to various causes.
For more information on GNSS processing using GAMIT/GLOBK please see the GNSS Time Series Notes.
GeoNet's GPS data are stored in RINEX (Receiver Independent Exchange) format.
The full set of 30-second sampling rate GPS/GNSS data are available via anonymous ftp from:
The last two months of 1-second sampling rate GPS data (for PositioNZ sites only) are available as 15-minute files via anonymous ftp from:
There are two forms of Rinex data available on our ftp site.
RINEX 2 files are in available for all sites but this format only includes tracking for GPS and GLONASS constellations. These files are in Hatanaka-compressed format, with a filename extension like .YYd.Z, where YY is the 2-digit year. Tools for converting Hatanaka-compressed RINEX to standard RINEX (filename extension .YYo) can be found at http://terras.gsi.go.jp/ja/crx2rnx.
RINEX 3 files are available for stations that are capable of tracking all GNSS constellations. These files are in Hatanaka and gzip compressed format (extension crx.gz). RINEX 3 file names follow the convention explained in the IGS Rinex 3 format document.
GeoNet's network map can be used to investigate the distribution of GNSS stations.
Full mark metadata for an individual site: http://magma.geonet.org.nz/services/gps/reception?markCode=taup
Change the markCode suffix to view each different site. In this example, markCode=taup returns station information for the Taupo continuous GPS station TAUP.
Station metadata are also provided following the International GNSS Service formats:
Site logs and XML files are available on the GeoNet ftp site.
Site equipment setup file that can be used for GNSS processing with Gamit/GlobK is also available on the GeoNet ftp site