<div class="csl-bib-body">
<div class="csl-entry">Böhm, S., Gruber, J. F., Kern, L., McCallum, J., McCallum, L., McCarthy, T., Quick, J., & Schartner, M. (2022). Characteristics and results of two years of a VLBI southern hemisphere intensive observing program. In <i>EGU General Assembly 2022</i>. EGU General Assembly 2022, Vienna, Austria. Copernicus Publications. https://doi.org/10.5194/egusphere-egu22-4801</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/136086
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dc.description.abstract
The parameter dUT1 (UT1-UTC, difference of universal time to atomic time) is essential for the transformation between celestial and terrestrial reference systems, inherent in precise navigation and positioning applications. Geodetic Very Long Baseline Interferometry (VLBI) is the only technique to directly observe dUT1. Real-time or near-real-time navigation tasks are dependent on rapid access to Earth orientation estimates or predictions. On a rapid turnaround basis, dUT1 is provided via so-called intensive sessions, which are routinely observed daily for one hour on one or sometimes more baselines. All currently operational intensive sessions are observed using northern hemisphere stations only.
In a joint initiative of TU Wien, the University of Tasmania, the Hartebeesthoek Radio Astronomy Observatory, and later on also ETH Zurich, we set up the southern hemisphere intensive observing program (SI). The SI sessions are observed with three VLBI telescopes all located south of the equator: HART15M (South Africa), HOBART12 (Tasmania), and YARRA12M (Western Australia). Observations including HOBART12 are observed in mixed-mode configuration, using the VGOS receiver in Hobart and the legacy systems at the two other stations.
By January 2022, we have successfully observed, correlated, and analyzed more than 50 SI sessions from the years 2020 and 2021. The resulting dUT1 values from the southern intensives are compared with dUT1 from the EOP 14 C04 series and with the results of other "northern intensives". The residuals with respect to C04 of the SI are on the same level as those of the INT1 and INT3 sessions and also match the level of agreement between all the various southern and northern intensives series.
en
dc.language.iso
en
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dc.publisher
Copernicus Publications
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dc.subject
UT1-UTC
en
dc.subject
VLBI
en
dc.subject
Intensive sessions
en
dc.title
Characteristics and results of two years of a VLBI southern hemisphere intensive observing program
en
dc.type
Konferenzbeitrag
de
dc.type
Inproceedings
en
dc.relation.publication
EGU General Assembly 2022
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dc.contributor.affiliation
University of Tasmania, Hobart, Australia
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dc.contributor.affiliation
University of Tasmania, Australia
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dc.contributor.affiliation
University of Tasmania, Australia
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dc.contributor.affiliation
Hartebeesthoek Radio Astronomy Observatory, South Africa
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dc.contributor.affiliation
ETH Zürich, Switzerland
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dc.type.category
Abstract Book Contribution
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tuw.booktitle
EGU General Assembly 2022
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tuw.researchTopic.id
C4
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tuw.researchTopic.id
X1
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tuw.researchTopic.id
C6
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tuw.researchTopic.name
Mathematical and Algorithmic Foundations
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tuw.researchTopic.name
Beyond TUW-research foci
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tuw.researchTopic.name
Modeling and Simulation
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tuw.researchTopic.value
30
-
tuw.researchTopic.value
40
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tuw.researchTopic.value
30
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tuw.publication.orgunit
E120-04 - Forschungsbereich Höhere Geodäsie
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tuw.publisher.doi
10.5194/egusphere-egu22-4801
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tuw.author.orcid
0000-0002-9815-183X
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tuw.author.orcid
0000-0002-4438-9658
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tuw.author.orcid
0000-0002-2065-9705
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tuw.event.name
EGU General Assembly 2022
en
tuw.event.startdate
23-05-2022
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tuw.event.enddate
27-05-2022
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Vienna
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tuw.event.country
AT
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tuw.event.institution
European Geosciences Union
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tuw.event.presenter
Böhm, Sigrid
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tuw.event.track
Multi Track
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wb.sciencebranch
Geodäsie, Vermessungswesen
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wb.sciencebranch
Informatik
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wb.sciencebranch
Physische Geographie
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wb.sciencebranch.oefos
2074
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wb.sciencebranch.oefos
1020
-
wb.sciencebranch.oefos
1054
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wb.sciencebranch.value
70
-
wb.sciencebranch.value
15
-
wb.sciencebranch.value
15
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wb.presentation.type
science to science/art to art
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item.openairetype
Konferenzbeitrag
-
item.openairetype
Inproceedings
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item.grantfulltext
none
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item.cerifentitytype
Publications
-
item.cerifentitytype
Publications
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item.languageiso639-1
en
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.fulltext
no Fulltext
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crisitem.author.dept
E120-04 - Forschungsbereich Höhere Geodäsie
-
crisitem.author.dept
E120-04 - Forschungsbereich Höhere Geodäsie
-
crisitem.author.dept
E120-04 - Forschungsbereich Höhere Geodäsie
-
crisitem.author.dept
University of Tasmania, Australia
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crisitem.author.dept
University of Tasmania, Australia
-
crisitem.author.dept
University of Tasmania, Australia
-
crisitem.author.dept
Hartebeesthoek Radio Astronomy Observatory, South Africa