ENA/MET/C1 - Wind sensor data questionable

The vector wind speed, wind direction, and standard deviation were occasionally 0, when 
wind direction was between 355 and 360 degrees.

Data values of 0 should be disregarded.

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