It is a good site for telescopes which probe the universe in the optical and infrared wavelengths because of its altitude and low levels of light pollution.
Among the telescopes belonging to the Mauna Kea Observatory, seven are involved in the ‘OHANA project : The project's big improvement is the use of optic fiber instead of mirrors to guide the beams in the interferometer recombination system.
Those tests were partly carried out on the Infrared Optical Telescope Array Observatory.
To do that, a long delay line was integrated in the Meudon Observatory to be used in the CFHT Coudé room.
The next stage will be the use of the two Kecks and the Subaru, then the use of Gemini North, the CFHT and UKIRT together, and finally, the use of all telescopes together.