Preprint Article Version 1 NOT YET PEER-REVIEWED

The RadioAstron dedicated DiFX distribution

  1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
  2. Deutsches GeoForschungsZentrum GFZ, Telegrafenberg A6, 14473 Potsdam, Germany
  3. Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
Version 1 : Received: 18 July 2016 / Approved: 19 July 2016 / Online: 19 July 2016 (04:54:57 CEST)

A peer-reviewed article of this Preprint also exists.

Bruni, G.; Anderson, J.M.; Alef, W.; Rottmann, H.; Lobanov, A.P.; Zensus, J.A. The RadioAstron Dedicated DiFX Distribution. Galaxies 2016, 4, 55. Bruni, G.; Anderson, J.M.; Alef, W.; Rottmann, H.; Lobanov, A.P.; Zensus, J.A. The RadioAstron Dedicated DiFX Distribution. Galaxies 2016, 4, 55.

Journal reference: Galaxies 2016, 4, 55
DOI: 10.3390/galaxies4040055

Abstract

DiFX is a software VLBI correlator currently adopted by several main correlation sites around the globe. After the launch of the RadioAstron Space-VLBI mission in 2011, an extension was necessary to handle processing of an orbiting antenna, to be correlated with supporting ground arrays. We present here a branch of the main DiFX distribution (2.4), recently uploaded on the publicly available repository, that MPIfR developed to process data of the three AGN-imaging RadioAstron key science projects. It can account for general relativistic correction of an orbiting antenna with variable position/velocity, providing a routine to covert the native RDF format to the more common M5B one. Also, a fringe-finding algorithm able to manage arbitrary large fringe-search window is included, allowing one to increase the search space normally adopted by common software packages like HOPS.

Subject Areas

VLBI; Space-VLBI; Correlation; RadioAstron; AGN

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