PIONIER (Very Large Telescope)

The Precision Integrated-optics Near-infrared Imaging Experiment (PIONIER) is a visiting instrument at the ESO's Paranal Observatory,^[1] part of the VLTI astronomical observatory. It combines the light from four telescopes simultaneously and provide 0.002 arc seconds of angular resolution, the equivalent angular resolution of a 100 m telescope.^{[citation needed]}

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Precision Integrated-Optics Near-infrared Imaging ExpeRiment

Alternative names	PIONIER
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PIONIER has been built at LAOG and has been installed at VLTI in November 2010.^{[citation needed]}