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If you are looking to measure wind speed at height then other than the excellent advice given above you should look towards other methods that you can find in books on meteorology. In particular some form of radio sonde (A’s was suggested above in some way) but using a balloon to carry the device which will not interfere with the measurements. In my day we used a helium balloon and theodolite and measure heights and angle that way, converting them to wind speeds and directions. Both of those are available on eBay . Like the others I would suggest that a drone will not be your best tool,to measure upper winds with.