PACMAN: PRIMA astrometric instrument software

Roberto Abuter; Johannes Sahlmann; Eszter Pozna

doi:10.1117/12.857388

21 July 2010 PACMAN: PRIMA astrometric instrument software

Roberto Abuter, Johannes Sahlmann, Eszter Pozna

Proceedings Volume 7734, Optical and Infrared Interferometry II; 77340W (2010) https://doi.org/10.1117/12.857388
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Roberto Abuter, Johannes Sahlmann, and Eszter Pozna "PACMAN: PRIMA astrometric instrument software", Proc. SPIE 7734, Optical and Infrared Interferometry II, 77340W (21 July 2010); https://doi.org/10.1117/12.857388

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