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How do I convert model grid-relative wind to earth-relative wind (so that I can compare model wind to observations?

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kwerner

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Below are the equations to convert model u and v to earth-relative u and v:

u-earth = u-model*cosalpha - v-model*sinalpha
v-earth = v-model*cosalpha + u-model*sinalpha

where cosalpha and sinalpha can be found in model input and output files.
 
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