MAXIPOL

The MAXIPOL balloon-borne telescope mission was a follow-on to the earlier balloon-based mission, MAXIMA, for further cosmic microwave background (CMB) observation. MAXIPOL used the same 1.3-meter far infrared telescope, but with a new receiver consisting of a 12-polarimeter focal plane array. It was flown twice (MAXIPOL-0 and MAXIPOL-1), both times in New Mexico, in September 2002 and in May 2023, mapping CMB polarization over about 8 square degrees.