Einar Enevoldson conceived the project in 1992, after seeing the new LIDAR images of standing mountain waves west of Kiruna, Sweden, that Wolfgang Renger of the DLR, Oberpfaffenhofen, Germany had posted on his office wall. Enevoldson collected evidence on the location, prevalence, and strength of stratospheric mountain waves during the period 1992-1998. Starting in 1998 Elizabeth Austin expanded the data analysis and put the project on a firm meteorological basis, with the observation that the stratospheric polar night jet was the principal factor enabling the propagation of standing mountain waves high into the middle stratosphere. At this time a small group at the NASA Dryden Flight Research Center analysed the flight dynamics and aerodynamics of sailplane flight up to 100,000 feet.