[image: 1675455078751-7d8a2e91-b899-4091-b45f-64736282241d-image.png] Use the orange slider

@giganticvis I believe linear is OK, exept the levels around tropopause and jetstreams were there is a discontinuity in temp. and wind. For the height of tropopause and the location and height of jet streams you must consult a Significant Weather Chart http://www.flightwork.com/weather/significant-weather-charts.html