HIPASS

HI Parkes All Sky Survey, usually abbreviated as HIPASS is a 1997-2002 conducted radio-astronomical survey of the sky at a wavelength of 21 cm, ie, the wavelength of neutral hydrogen. It was carried out with the 64- m radio telescope at the Parkes Observatory in Australia. Because of the location (33 ° South and 148 ° 15 'E) and the telescope objects can not drive north of 55 ° north, along with the NRAO VLA Sky Survey is thus but a complete map of the sky in the 21cm- line before.