From left, Capt. Brian Gatzke, a test engineer with the Propulsion Test Branch of Arnold Engineering Development Complex; Theron Price, a doctoral student at the University of Tennessee Space Institute (UTSI); Dr. Phil Kreth, an assistant professor with UTSI; Terry Hayes, vice president and chief technical officer of Non-Contact Technologies, LLC, (NCT); and Marc Dennis, a test and assembly engineer with NCT, stand next to a focused laser differential interferometry (FLDI) setup at UTSI within the confines of Arnold Air Force Base, Tenn., Dec. 15, 2021. FLDI is being developed by UTSI and NCT for collecting data about exhaust plumes through the Small Business Technology Transfer program. (U.S. Air Force photo by Jill Pickett)
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