Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia Society
Publications of the Astronomical Society of Australia

Use of the Long Baseline Array in Australia for Precise Geodesy and Absolute Astrometry

Leonid Petrov A G , Chris Phillips B , Alessandra Bertarini C , Adam Deller D , Sergei Pogrebenko E and Ari Mujunen F
+ Author Affiliations
- Author Affiliations

A ADNET Systems, Inc./NASA GSFC, Code 610.2, Greenbelt, MD 20771, USA

B Australia Telescope National Facility, Australia

C Institute of Geodesy and Geoinformation, Nussallee 17, Bonn, Germany

D Centre for Astrophysics and Supercomputing Swinburne University, Hawthorn VIC 3123, Australia

E Joint Institute for Very Long Baseline Interferometry in Europe, The Netherlands

F Metsähovi Radio Observatory, Helsinki University of Technology TKK, Finland

G Corresponding author. Email:

Publications of the Astronomical Society of Australia 26(1) 75-84
Submitted: 29 October 2008  Accepted: 12 January 2009   Published: 2 April 2009


We report the results of a successful 12-hour 22-GHz VLBI experiment using a heterogeneous network that includes radio telescopes of the Long Baseline Array (LBA) in Australia and several VLBI stations that regularly observe in geodetic VLBI campaigns. We have determined positions of three VLBI stations, atca-104, ceduna and mopra, with an accuracy of 4–30 mm using a novel technique of data analysis. These stations have never before participated in geodetic experiments. We observed 105 radio sources, and amongst them 5 objects which have not previously been observed with VLBI. We have determined positions of these new sources with the accuracy of 2–5 mas. We make the conclusion that the LBA network is capable of conducting absolute astrometry VLBI surveys with an accuracy better than 5 mas.

Keywords: instrumentation: interferometers — techniques: interferometric — reference systems


EXPReS is an Integrated Infrastructure Initiative (I3), funded under the European Commission’s Sixth Framework Programme (FP6), contract number 026642, from March 2006 through February 2009. We greatly appreciate Alan Fey and Roopesh Ojha who made digital images in FITS format from the surveys publicly available and Robert Campbell for performing the highly non-standard test correlations of LBA data at the JIVE correlator.


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4 Source code and detailed documentation is available at

5 A machine readable version of this table is also accessible in the electronic supplement.

6 Available at

7 The table of absolute positions of the ATCA antenna stations can be found at


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