Authors / CoAuthors
Thomas, B. | Brown, N. | McCubbine, J.
Abstract
<div>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.</div><div><br></div>
Product Type
document
eCat Id
148836
Contact for the resource
Resource provider
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Digital Object Identifier
Keywords
- ( Project )
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- Mount Pleasant
- ( Project )
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- Local Tie survey 2023
- ( Project )
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- 50116S007
- ( Project )
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- 50116S002
- ( Project )
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- 50116M004
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- Local Tie
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- co-located
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- geodetic
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- Survey
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- Hobart
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- Mount Pleasant
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- HOB2
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- AU16
- theme.ANZRC Fields of Research.rdf
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- Earth system sciences
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- Published_External
Publication Date
2023-12-14T00:47:11
Creation Date
Security Constraints
Legal Constraints
Status
completed
Purpose
This report provides a continuation of the local tie connection data set obtained at the site, to provide an updated value of the local tie vectors for use by the international geodetic community and determination of the international terrestrial reference frame (ITRF), and to allow comparison to previous solutions so to monitor deformation in the local system.
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
GA Record GA Record 2023/52
Lineage
<div>This document is a report about the terrestrial survey completed at the site in this year. It is a continuation of a set of results from similar works completed at the site in previous years. The current report references the results of the previous work, but for complete workings of previous surveys, refer to the relevant report of that dataset.</div>
Parent Information
Extents
[-43, -42.5, 147, 147.5]
Reference System
Spatial Resolution
Service Information
Associations
Source Information