The Hyper-Angular Rainbow Polarimeter #2 (HARP2) instrument undergoes calibration testing after at NASA's Goddard Space Flight Center in Greenbelt Maryland on October 4th, 2022. HARP2 is one of three instruments on NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) observatory, it was designed and built by UMBC's Earth and Space Institute.