Calibrating away at Mauna Loa Observatory

4STAR, 4STARB, and AATS are standing tall at the Maun Loa Observatory, at 11000 ft altitude within the remote Pacific Atmosphere, where the nearly pristine environment, with low aerosol optical depth, is used for calibrating our measurements.

AATS, 4STARB, and 4STAR staring at the sunrise
Mission: