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Simulating the effects of quasar structure on parameters from geodetic VLBI
Citation
Shabala, SS and McCallum, JN and Plank, L and Bohm, J, Simulating the eff ects of quasar structure on parameters from geodetic VLBI, Journal of Geodesy, 89, (9) pp. 873-886. ISSN 0949-7714 (2015) [Refereed Article]
Copyright Statement
Copyright 2015 Springer-Verlag Berlin Heidelberg
DOI: doi:10.1007/s00190-015-0820-6
Abstract
We investigate the effects of quasar structure on geodetic VLBI measurements.
We create catalogues of simulated and real quasars with a range of
structure indices, and use these to generate synthetic CONT11 observations with
the Vienna VLBI Software (VieVS) simulator tool. We systematically investigate
the effects of quasars with different amounts of source structure, and find that
source structure can affect station positions at the one millimetre level. This effect
is stronger for isolated stations. Overall, source structure is found to contribute to
about 10 percent of the troposphere and clock effects. Our simulations confirm analytical
predictions that source structure mitigation strategies must be developed
in order to achieve millimetre-level VLBI position accuracy.
Item Details
Item Type: | Refereed Article |
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Keywords: | geodesy, Very Long Baseline Interferometry (VLBI), astrometry, Celestial Reference Frame (CRF) |
Research Division: | Earth Sciences |
Research Group: | Geophysics |
Research Field: | Geodesy |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the physical sciences |
UTAS Author: | Shabala, SS (Associate Professor Stas Shabala) |
UTAS Author: | McCallum, JN (Dr Jamie McCallum) |
UTAS Author: | Plank, L (Dr Lucia McCallum) |
ID Code: | 100257 |
Year Published: | 2015 |
Funding Support: | Australian Research Council (DE130101399) |
Web of Science® Times Cited: | 7 |
Deposited By: | Mathematics and Physics |
Deposited On: | 2015-05-08 |
Last Modified: | 2017-11-06 |
Downloads: | 0 |
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