SGP/EBBR/E12 - Wind Direction Sensor Malfunctions

For much of the period above, a malfunction in the E12 EBBR wind direction 
sensor (insect larvae shorting out the circuit board) caused incorrect 
values for 5 minute res_ws, wind_d, and sigma_wd, 15 minute mv_wind_d, and 
30 minute res_ws, wind_d, and sigma_wd.  Wind direction normally indicated 
north (near 0 or 360 degrees); there were some times during the period when 
wind directions looked good, but the lack of variation in direction and sigma 
implies that the data is suspect.  Therefore, it would be wise to flag all
of the values listed above during the entire time period as incorrect. 
The wind direction sensor (S/N 3081) was replaced with S/N 3042 at 1515 GMT 
on June 8, 1997.

Resultant wind speed is incorrect: under this condition it has the same 
value as mean wind speed.

• Wind direction vector mean (mV)(wdir_vec_mean_mv)

• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind direction vector mean standard deviation(wdir_vec_std)

• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind direction vector mean standard deviation(wdir_vec_std)