sentences:  A study of operational interferometric gravitational wave detectors shows that AIGO is situated in almost the ideal location to complement existing detectors in the Northern hemisphere.Current facilities (AIGO Stage I) consist of an L-shaped ultra high vacuum system, measuring 80 m on each side forming an interferometer for detecting gravitational waves.LIGO-Australia was a proposed plan (AIGO Stage II) to install an Advanced LIGO interferometer at AIGO, forming a triangle of three Advanced LIGO detectors.