Last update: September 21st, 2019 at 2:52 pm
GPM on its last truck during shipment to the launch site. On the back of the shipping container sits the Environmental Control Unit (left), as well as its generator (green on the right). The ECU has heaters and air conditioners to regulate temperature and humidity as well as filters on the air vents to keep out any contaminants.
Image Credit: NASA / Michael Starobin