Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
: Received: 18 July 2016 / Approved: 19 July 2016 / Online: 19 July 2016 (04:54:57 CEST)
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Bruni, G.; Anderson, J.; Alef, W.; Rottmann, H.; Lobanov, A.; Zensus, J. The RadioAstron dedicated DiFX distribution. Preprints2016, 2016070060 (doi: 10.20944/preprints201607.0060.v1).
Bruni, G.; Anderson, J.; Alef, W.; Rottmann, H.; Lobanov, A.; Zensus, J. The RadioAstron dedicated DiFX distribution. Preprints 2016, 2016070060 (doi: 10.20944/preprints201607.0060.v1).
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.