What is "pionier"

Pionier may refer to:

• PIONIER, the Polish academic network
• Pionier, the German-language paper published by Karl Heinzen
• PIONIER (VLTI), an instrument at the VLTI astronomical observatory
• the Wehrmacht "Pioniere" combat engineering battalions

The Precision Integrated-Optics Near-infrared Imaging ExpeRiment (PIONIER) is an instrument for the VLTI astronomical observatory. It combines the light from four telescopes simultaneously and provide the equivalent angular resolution of a 100 m telescope.

PIONIER has been built at LAOG and has been installed at VLTI in November 2010. After few nights of commissioning, it is now routinely delivering science data.