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Aero-optical measurements of a boundary layer at high supersonic speeds of M = 3.0 and 4.3 were performed in the Trisonic Wind Tunnel at the US Air Force Academy. Overall levels of aero-optical distortions, convective speeds and the aperture functions were calculated from the data. It was found that the statistics of the aero-optical distortions were similar to subsonic boundary layers. Several modified models were shown to properly predict aerooptical levels of boundary layers up to M = 5. As a separate experiment, a wedge model was placed inside the tunnel to study the aero-optical effects of the attached oblique shock. Aerooptical structures with an abnormally-low convective speed were observed in the laser beam traversing the oblique shock around the wedge. These structures were speculated to be related to convecting unsteady distortions imposed on the oblique shock by the naturallyvibrating wedge.

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