F-15A
F-15B
NASA's F-15B research testbed jet from NASA's Dryden Flight Research Center flew in the supersonic shockwave of a Northrop-Grumman Corp. - modified U.S. Navy F-5E jet in support of the Shaped Sonic Boom Demonstration (SSBD) project, which is part of the DARPA's Quiet Supersonic Platform (QSP) program.
On August 27, 2003, the F-5 SSBD aircraft demonstrated a method to reduce the intensity of sonic booms.The project is an effort to lessen sonic booms.
During the recent demonstration, the F-15B flew behind the modified F-5E sonic boom demonstrator aircraft in order to measure the aircraft's sonic boom characteristics.
Flying behind and below the F-5E, and using its specially-instrumented nose boom, the F-15B recorded many shockwave patterns from the F-5E at various distances and orientations from the aircraft.