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Automated and dynamic scheduling for geodetic VLBI – a simulation study for AuScope and global networks

Citation

Iles, EJ and McCallum, L and Lovell, JEJ and McCallum, JN, Automated and dynamic scheduling for geodetic VLBI - a simulation study for AuScope and global networks, Advances in Space Research pp. 1-12. ISSN 0273-1177 (In Press) [Refereed Article]


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DOI: doi:10.1016/j.asr.2017.11.012

Abstract

As we move into the next era of geodetic VLBI, the scheduling process is one focus for improvement in terms of increased flexibility and the ability to react with changing conditions. A range of simulations were conducted to ascertain the impact of scheduling on geodetic results such as Earth Orientation Parameters (EOPs) and station coordinates. The potential capabilities of new automated scheduling modes were also simulated, using the so-called ‘dynamic scheduling’ technique. The primary aim was to improve efficiency for both cost and time without losing geodetic precision, particularly to maximise the uses of the Australian AuScope VLBI array.

We show that short breaks in observation will not significantly degrade the results of a typical 24 h experiment, whereas simply shortening observing time degrades precision exponentially. We also confirm the new automated, dynamic scheduling mode is capable of producing the same standard of result as a traditional schedule, with close to real-time flexibility. Further, it is possible to use the dynamic scheduler to augment the 3 station Australian AuScope array and thereby attain EOPs of the current global precision with only intermittent contribution from 2 additional stations. We thus confirm automated, dynamic scheduling bears great potential for flexibility and automation in line with aims for future continuous VLBI operations.

Item Details

Item Type:Refereed Article
Keywords:geodesy, Very Long Baseline Interferometry (VLBI), scheduling, simulation, AuScope
Research Division:Engineering
Research Group:Geomatic Engineering
Research Field:Geodesy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Iles, EJ (Miss Elizabeth Iles)
Author:McCallum, L (Dr Lucia McCallum)
Author:Lovell, JEJ (Dr Jim Lovell)
Author:McCallum, JN (Dr Jamie McCallum)
ID Code:122885
Year Published:In Press
Deposited By:Mathematics and Physics
Deposited On:2017-12-05
Last Modified:2017-12-05
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