DQRID : D061003.1
Start DateStart TimeEnd DateEnd Time
09/25/2006223410/04/20062347
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Subject:
NSA/METTWR/C1 - All data from 10m Level Missing
DataStreams:nsamettwr4hC1.b1
Description:
The winch that lowers the tower booms failed.  Manual testing of the motor and winch 
allowed the booms to be lowered briefly and then raised back into position.  A heavy freezing 
rain/icing event added extra weight to the booms.  This extra weight was suspected as the 
cause as to why the 10m boom became disconnected.  After a new motor was installed and 
all booms were lowered and re-raised the 10m level came back on line.
Suggestions: 
Use 2m or 20m level data.
Measurements:nsamettwr4hC1.b1:
  • 10m Average Temperature(T10M_AVG)
  • Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
  • 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
  • Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
  • 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
  • Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
  • Standard Deviation of 10m Relative Humidity(RH10M_STD)
  • 10m Vector Averaged Wind Speed(WS10M_U_WVT)
  • 10m Average QLI Reference Temperature(RefT10m_AVG)
  • Standard Deviation of 10m Temperature(T10M_STD)
  • 10m Average Calculated Vapor Pressure(VP10M_AVG)
  • 10m Average Calculated Dew Point(DP10M_AVG)
  • 10m Average QLI Input Voltage(Volt10M_AVG)
  • 10m Average Relative Humidity(RH10M_AVG)
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