The above isentrope altitude cross-section (IAC) for the SOLVE DC-8 flight on January 25, 2000, shows the largest mountain lee wave ever recorded by a MTP. It was seen as the DC-8 was heading west towards Norway just south of Kiruna, Sweden. The flight track was chosen because large lee waves had been predicted by several models. At the time of the encounter (60.1 ks = 16.7 hrs UT), the DC-8 was flying at 12.5 km above the tropopause (11.7 km). The wavelength of the lee waves was about 31 km. Mountain lee wave lovers go here for a more information describing this event.