NSA/METTWR/C1 - Instrument problem, Contamination, False signal

Heavy, wet and blowing snow and ice caused measurement problems with the sonic anemometer 
mounted at the 2m level.  Erroneous readings caused both the wind speed and direction 
values to be reported anomolously.  Once the heavy, wet snow and ice stopped the readings 
returned to normal.

Use the wind speed and direction values from the cup and vane at the 2m level.

• Average X Component of Sonic Wind Speed(SonicX_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Wind direction vector mean standard deviation(SonicWD_SDU_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)