Schlieren Supersonic Shock WavesOne of the greatest challenges of the fourth phase of Air-to-Air Background Oriented Schlieren flights, or AirBOS flight series was...NASA used a U.S. Air Force Test Pilot School T-38 aircraft and cameras with a special filter on the ground...NASA is using a modern version of a 150-year-old German photography technique — schlieren imagery — to visualize supersonic flow...This schlieren image of a T-38C was captured using the patented Background Oriented Schlieren using Celestial Objects (BOSCO) technique and...This schlieren image of shock waves created by a T-38C in supersonic flight was captured using the sun’s edge as...A T-38C from the Air Force Test Pilot School served as a target for NASA’s schlieren imaging system.NASA is using a 21st century version of schlieren imagery, invented by a German physicist in 1864, to visualize supersonic...