Airbus Perlan 2 glider achieves a new altitude record of 76,000ft. https://www.aerosociety.com/news/surfing-the-mountain-wave/ The origins of the project began in 1992 when Enevoldson saw new LIDAR images of standing mountain waves west of Kiruna, Sweden on an office wall during a visit to the DLR research establishment in Germany. Over the next six years Enevoldson collected evidence on the location, prevalence, and strength of stratospheric mountain waves. From 1998 the data analysis was expanded by Dr Austin and the significance was realised of the stratospheric polar night jet in propagating high altitude standing mountain waves. Meanwhile, researchers at the NASA Dryden Flight Research Center were looking at the flight dynamics and aerodynamics of sailplane flight up to 100,000ft.