It was used to map the cosmic microwave background radiation (CMBR).[7] MAXIMA 1998–99 Microwave telescope with a cryogenic receiver that was used to measure the CMBR.[8] HERO 2001–10 Hard X-ray telescope that flew successfully beginning in 2001 but crashed in 2010, destroying the telescope.[9] BLAST 2003– Submillimetre telescope with a 2 m aperture.