Behind the scenes
DeeDee Dockrey, an Aerospace Testing Alliance (ATA) signature measurement team engineer, and ATA Instrument Technician Matt Reel at the U.S. Air Force's Arnold Engineering Development Center, calibrate and prepare an infrared radiometer for a test. An infrared radiometer is an instrument that measures the intensity of infrared energy coming from a source, such as a missile plume from a shoulder launched missile. ATA is the support contractor for AEDC. (Photo by Rick Goodfriend)