The Compton Spectrometer and Imager explained

Dr. Steven Boggs, professor and head of the Department of Physics, University of California, Berkeley, describes the objectives of the Compton Spectrometer and Imager (COSI), a gamma-ray telescope set for liftoff to the near space environment via a NASA super pressure balloon.

The balloon launch is scheduled for no earlier than Monday, April 4, from Wanaka, New Zealand, NASA’s location for launching mid-latitude, southern hemisphere balloon missions.