ASI/SODAR/M1 - Sodar Processing Unit communication failure

Due to sodar processing unit communication failure there is frequent (almost on a daily 
basis) sodar data loss during the DQR period. Whenever available, data quality is not 
affected.

• (Raw data stream - documentation not supported)

• Round-trip time for acoustic pulse from selected range gates(time_gate)
• Mode index(mode)
• Spectral power(spectral_power)
• radiation_frequency(frequency)

• Instrument error codes(instrument_error)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Height(height)
• Vertical component of wind speed(vertical_wind_speed)
• Direction from which the wind blows, with respect to Geographic or Magnetic
  north(wind_direction)
• Standard deviation of vertical component of wind speed(vertical_wind_speed_std)
• Wind speed 5m AGL at the ground station(wind_speed)