Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination

Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination Tiege McCarthy, Lucia McCallum, Matthias Schartner This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4727071/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Apr, 2025 Read the published version in Earth, Planets and Space → Version 1 posted 5 You are reading this latest preprint version Abstract In this simulation study, we investigate the potential performance of VLBI intensives using the AuScope 12-metre VLBI network. This continental Australian network consisting of three stations, has recently been fully upgraded with VGOS receivers and has the capacity for observing the first southern hemisphere VGOS intensive series. This intensive series can be conducted entirely in-house, from the scheduling through to the correlation and post-processing. We determine such a VGOS intensive series could achieve a median performance, with respect to the estimation of UT1-UTC, of 9.74 μs for mean formal error and 17.95 μs for repeatabiliy, which is comparable to existing inter-continental S/X intensive series. Additionally, we investigate the effects of varying observation duration and session duration on the accuracy of the UT1-UTC estimate from this network. The ideal location for a 4th station on continental Australia is also evaluated under the context of optimising UT1-UTC performance, with north-eastern Tasmania providing the greatest increase to UT1-UTC accuracy. Finally, we investigate the effect of adding the Warkworth 12-metre into the network and determine the best location for a future antenna to be situated to maximise UT1-UTC performance. Very Long Baseline Interferometry (VLBI) UT1-UTC Intensive sessions Earth rotation VGOS Full Text Supplementary Files graphicalabstract.png Cite Share Download PDF Status: Published Journal Publication published 29 Apr, 2025 Read the published version in Earth, Planets and Space → Version 1 posted Editorial decision: Major Revision 27 Feb, 2025 Reviewers agreed at journal 25 Jul, 2024 Reviewers invited by journal 25 Jul, 2024 Editor assigned by journal 22 Jul, 2024 First submitted to journal 11 Jul, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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