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2023 Mount Pleasant Geodetic Observatory (Hobart) Co-Location Local Tie Survey Technical Report

Created 17/10/2025

Updated 17/10/2025

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The integrity and strengths of multi-technique terrestrial reference frames such as ITRF2020 depend on the precisely measured and expressed local tie connections between space geodetic observing systems at co-located observatories. A local tie survey was conducted at the Mount Pleasant Geodetic observatory, in Hobart in March 2023. The aim of the survey was to precisely measure the local terrestrial connections between the space-based geodetic observing systems co-located at the observatory, which includes a permanent International GNSS Service (IGS) site (HOB2 A 50116M004), and Very Long Baseline Interferometry (VLBI) radio telescopes. In particular, this report documents the indirect measurement of the VLBI invariant reference point for both the 12m (7374 A 50116S007) and 26m (7242 A 50116S002) radio telescopes at the site. Geoscience Australia has routinely performed classical terrestrial surveys at Mount Pleasant since 1995. A high precision survey was conducted between the survey pillars surrounding the observatory. These survey pillars were monitored to ensure their stability as part of a consistent, stable terrestrial network from which local tie connections were made to the VLBI and GNSS systems. The relationship between points of interest included the millimetre level accurate connections and their associated variance covariance matrix.

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Field Value
Title 2023 Mount Pleasant Geodetic Observatory (Hobart) Co-Location Local Tie Survey Technical Report
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/f64e42e4-1e21-4005-a836-91438696e5c5
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 14/12/2023
Geospatial Coverage
Map data © OpenStreetMap contributors
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      ],
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  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "2023 Mount Pleasant Geodetic Observatory (Hobart) Co-Location Local Tie Survey Technical Report". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/2023-mount-pleasant-geodetic-observatory-hobart-co-location-local-tie-survey-technical-report