d01341ba-30aa-4f34-8f54-c10c83d968c9 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T08:23:50 creation ISO 19115 2016 2018 Mount Stromlo Geodetic Observatory Co-Location Local Tie Survey Technical Report d01341ba-30aa-4f34-8f54-c10c83d968c9 The integrity and strength of multi-technique terrestrial reference frames, such as realisations of the International Terrestrial Reference Frame (ITRF), depend on the precisely measured and expressed local-tie connections between space geodetic observing systems at co-located observatories. Australia has several observatories which together host the full variety of space geodetic observation techniques, including Global Navigation Satellites Systems (GNSS), Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR) and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) beacons. This report documents the technical aspects of the local tie survey completed at the Mount Stromlo observatory, in Canberra in September 2018. 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 include 3 International GNSS Service (IGS) stations (AU45 A 50119M001, STR3 A 50119M005 & STR1 A 50119M002), SLR (7825 A 50119S003) and DORIS (MSPB A 50119S004) infrastructure. In particular, this report documents the indirect measurement of the SLR invariant reference point. Geoscience Australia has routinely performed classical terrestrial surveys at Mount Stromlo, including surveys in 1999, 2002 and 2003 (post-fire). A high precision survey was conducted between the survey pillars surrounding the SLR 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 SLR and other observing systems. The relationship between points of interest included the millimetre level accurate connections and their associated variance covariance matrix. {"type": "Polygon", "coordinates": [[[149.0, -35.5], [149.5, -35.5], [149.5, -35.0], [149.0, -35.0], [149.0, -35.5]]]} 149.0 149.5 -35.5 -35.0 50119M001 50119M001 50119S004 50119S003 50119M005 50119M002 50119M002 50119M005 50119S003 50119S004 Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) Local Tie Local Tie Survey 2018 Mount Stromlo OTHER EARTH SCIENCES Published_External STR1 STR2 STR3 Satellite Laser Ranging (SLR) Survey co-located geodetic Download the Record (pdf) [2.7 MB] documentDigital Download the Record (pdf) [2.7 MB] PDF Download associated data (SNX) [15 KB] documentDigital Download associated data (SNX) [15 KB] HTML