High, dry sites Atacama, Chile CMB (Stage 3) Image of a brown, mountain terrain with several small telescopes. Labels are: Simons Observatory now being built here. Simons Array (POLARBEAR 2.5m x 3) CLASS (1.5m x 2) 6m Atacama Cosmology Telescope South Pole CMB (Stage 3) A flat, snow-covered landscape. There are several buildings and tracks in the snow. Labels are: NSF Amundsen Scott Research Station BICEP3 (0.55m) 10m South Pole Telescope BICEP Array (0.55m x 4)
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