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6. We should keep track of the frequency and amplitude of the noise while correcting the CWEX11 data. We also may get turbine operating parameter data (rotation speed?) from the wind farm operator. This log entry may be revisited with a check of whether these values are correlated.
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Postlude:
Contrary to summary comment 2 above, I now note that noise is apparent in the PTB220's pressure signal as well. This occurs all the time at stn2 and some of the time at stns 3&4. Note that it is impossible to detect that it is 2Hz noise, since the sampling rate is 1sps. Also note that this stn 2/4 behavior is opposite that seen in kh2oV, where the noise was continuous and large at stn 4 and much less and variable at stn 2. The bottom-line conclusion probably doesn't change -- the source likely is RF and the effect on a sensor depends on some nuance of mounting and cabling.
Unfortunately, this "noise" appears to preclude the use of pressure to identify the existence of turbine wakes at the surface, though it might be possible to pull out a signal...