What is "hipass"

The HI Parkes All Sky Survey (HIPASS) is a large survey for neutral atomic hydrogen (HI). Most of the data was taken between 1997 and 2002 using CSIRO's 64-m Parkes Telescope. HIPASS covered 71% of the sky and identified more than 5000 galaxies; the major galaxy catalogs are: the "HIPASS Bright Galaxy Catalog" (HIPASS BGC), the southern HIPASS catalog (HICAT), and the northern HIPASS catalog (NHICAT) Discoveries include over 5000 galaxies (incl. several new galaxies), the Leading Arm of the Magellanic Stream and a few gas clouds devoid of stars.