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10/30, I recalculated the offset using data from Sept 30 through 12:00 Oct 30 and set the minimum speed equal to 10 m/s. The result is Dir.10m - dir.3m = 0.2 +/- 0.8 degree, so need to subtract another 0.2 degrees or add 226.8 degrees to the 2D wind direction data.
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10/8, At FLR, the 2D sonic was pointed nominally north, but must be off by 180 degrees. The median value of Dir.10m + 180 - dir.3m = 6.6 +/- 5 deg. Thus need to add 180 - 6.6 = 173.4 deg to 2D wind direction data.
10/30, I recalculated the offset using data from Sept 30 through 12:00 Oct 30 and set the minimum speed equal to 3 m/s. The result is Dir.10m - dir.3m = -0.6 +/- 5.4 degree, so need to add another 0.6 degrees or add 174 degrees to the 2D wind direction data.
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