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iGorland

Does anyone know how global winds and temperatures at an altitude are interpolated?

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Hello, everyone.

 

As of X-Plane 10.50, the global winds are projected using file "global_winds.grib". The file includes u-component and v-component of winds at altitudes 10K and 34K feet. Does anyone know how winds are interpolated between these two altitudes? Something like:

 

y=y1+((x-x1)*((y2-y1)/(x2-x1)))

 

Or there is another algorithm?

 

Are winds extrapolated below 10K and above 34K feet?

 

I also noticed that X-Plane 11 does not include file "winds.rwx" anymore. That file included temperatures at various altitudes. How is temperature at an altitude now projected in X-Plane 11 without this file in US and outside of US?

 

Thank you so much in advance!

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I assume it's a linear interpolation:

 

http://developer.x-plane.com/?article=custom-wind-weather-in-x-plane-10.

 

You could also take an airliner and then use datarefeditor to check how the winds behave at different altitudes. You have to find the specific dataref that contains the wind velocity at aircraft position ( should be sim/weather/wind_speed_kt )


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