PoleStar: An 810 GHz Array Receiver for AST/RO

We have constructed a 4-channel receiver at 810 GHz for use on the Antarctic Submillimeter Telescope and Remote Observatory located at the South Pole (AST/RO). The array was assembled and tested at the Steward Observatory Radio Astronomy Lab (SORAL) and then installed on AST/RO in November-December 2000. In this paper we describe the instrument and its performance both in the lab and on the telescope.