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Proceedings Paper

PACMAN: PRIMA astrometric instrument software
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Paper Abstract

The dual feed astrometric instrument software of PRIMA (PACMAN) that is currently being integrated at the VLTI will use two spatially modulated fringe sensor units and a laser metrology system to carry out differential astrometry. Its software and hardware compromises a distributed system involving many real time computers and workstations operating in a synchronized manner. Its architecture has been designed to allow the construction of efficient and flexible calibration and observation procedures. In parallel, a novel scheme of integrating M-code (MATLAB/OCTAVE) with standard VLT (Very Large Telescope) control software applications had to be devised in order to support numerically intensive operations and to have the capacity of adapting to fast varying strategies and algorithms. This paper presents the instrument software, including the current operational sequences for the laboratory calibration and sky calibration. Finally, a detailed description of the algorithms with their implementation, both under M and C code, are shown together with a comparative analysis of their performance and maintainability.

Paper Details

Date Published: 21 July 2010
PDF: 12 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77340W (21 July 2010); doi: 10.1117/12.857388
Show Author Affiliations
Roberto Abuter, European Southern Observatory (Germany)
Johannes Sahlmann, Observatoire de Genève (Switzerland)
European Southern Observatory (Germany)
Eszter Pozna, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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