HARP2 is a contributed instrument to the PACE mission, designed and built by UMBC's Earth and Space Institute.
HARP2 HeritageHARP2 is preceded by its aircraft version (AirHARP) and by the HARP 3U CubeSat satellite that was successfully launched from the International Space Station on 19-Feb-2020 (learn more at the UMBC website). The three current versions of HARP uses the same basic telescope and optical system to measure polarization in the visible and near infrared (VNIR) spectral ranges.
The AirHARP instrument has flown on the NASA ER2 aircraft during the ACEPOL (Aerosol Characterization from Polarimeter and Lidar) campaign and on the NASA UC12 aircraft during the LMOS (Lake Michigan Ozone Study). AirHARP data has been used for algorithm development to demonstrate the science proposed for the HARP2 instrument on the retrieval of aerosol and cloud properties.