Arcminute_Cosmology_Bolometer_Array_Receiver
Arcminute Cosmology Bolometer Array Receiver
Measure the anisotropy of the Cosmic microwave background
ACBAR was an experiment to measure the anisotropy of the Cosmic microwave background. It was active 2000-2008.
The ACBAR 145 GHz measurements were the most precise high multipole measurements of the CMB at the time.