Data Quality Reports for Session: 110943 User: cfluzheng Completed: 03/10/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040930.1NSA/METTWR/C1 - Instrument problem, Contamination, False signalnsamettwr4hC1.b1
D041004.1NSA/METTWR/C2 - Data Incorrect during Maintenancensamettwr2hC2.b1
D041004.2NSA/METTWR/C2 - All Data Missing or Incorrect during Maintenancensamettwr2hC2.b1
D041004.3NSA/METTWR/C2 - PWS Data Suspectnsamettwr2hC2.b1
D041020.1NSA/METTWR/C1 - Sonic - Instrument problem, Contamination, False signalnsamettwr4hC1.b1
D041101.1NSA/METTWR/C1 - Instrument problem, Frosting/Condensationnsamettwr4hC1.b1
D050527.2NSA/METTWR/C1 - Incorrect Maximum for Precip Valuesnsamettwr4hC1.b1
D050527.3NSA/METTWR/C2 - Incorrect Maximum for Precip Valuesnsamettwr2hC2.b1
D051025.2NSA/METTWR/C1 - Data 1-minute behindnsamettwr4hC1.b1
D051101.4NSA/METTWR/C1 - Reprocess: Wind direction data incorrectnsamettwr4hC1.b1
D060817.4NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPansamettwr4hC1.b1
D060818.1NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPansamettwr2hC2.b1


DQRID : D040930.1
Start DateStart TimeEnd DateEnd Time
09/27/2004152109/29/20040452
Subject:
NSA/METTWR/C1 - Instrument problem, Contamination, False signal
DataStreams:nsamettwr4hC1.b1
Description:
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.
Measurements:nsamettwr4hC1.b1:
  • Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
  • Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
  • Average Y Component of Sonic Wind Speed(SonicY_AVG)
  • Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
  • Average Sonic Static Speed of Sound(SonicS_AVG)
  • Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
  • Average X Component of Sonic Wind Speed(SonicX_AVG)

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DQRID : D041004.1
Start DateStart TimeEnd DateEnd Time
09/17/2004013009/17/20040411
Subject:
NSA/METTWR/C2 - Data Incorrect during Maintenance
DataStreams:nsamettwr2hC2.b1
Description:
The 10m tower was lowered for 2-year change-out of the met sensors.  Data during this time 
is not representative.
Measurements:nsamettwr2hC2.b1:
  • Vector Averaged Wind Speed(WinSpeed_U_WVT)
  • 5m Average Calculated Dew Point(DP5m_AVG)
  • Arithmetic Mean Wind Speed(WinSpeed_S_WVT)
  • Standard Deviation of Vector Averaged Wind Direction(WinDir_SDU_WVT)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Vector Averaged Wind Direction(WinDir_DU_WVT)
  • Standard Deviation of 5m Calculated Vapor Pressure(VP5m_STD)
  • 2m Average Temperature(T2m_AVG)
  • 5m Average Temperature(T5m_AVG)
  • 5m Average Relative Humidity(RH5m_AVG)
  • Standard Deviation of 5m Calculated Dew Point(DP5m_STD)
  • 5m Average Calculated Vapor Pressure(VP5m_AVG)
  • Standard Deviation of 5m Relative Humidity(RH5m_STD)
  • 2m Average Calculated Vapor Pressure(VP2m_AVG)
  • 2m Average Relative Humidity(RH2m_AVG)
  • Standard Deviation of 2m Relative Humidity(RH2m_STD)
  • Standard Deviation of 2m Calculated Dew Point(DP2m_STD)
  • Standard Deviation of 2m Calculated Vapor Pressure(VP2m_STD)
  • QLI Average Reference Temperature(RefTemp_AVG)
  • QLI Average Input Voltage(QLIVolt_AVG)
  • Standard Deviation of 5m Temperature(T5m_STD)
  • 2m Average Calculated Dew Point(DP2m_AVG)
  • Standard Deviation of 2m Temperature(T2m_STD)

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DQRID : D041004.2
Start DateStart TimeEnd DateEnd Time
09/17/2004221709/18/20040047
09/18/2004232409/19/20040307
Subject:
NSA/METTWR/C2 -  All Data Missing or Incorrect during Maintenance
DataStreams:nsamettwr2hC2.b1
Description:
All data incorrect or missing due to change of the Serial Data multiplexer and the Vaisala 
QLI data collector during these times.
Measurements:nsamettwr2hC2.b1:
  • Atmospheric Pressure(AtmPress)
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Standard Deviation of 5m Calculated Vapor Pressure(VP5m_STD)
  • 5m Average Temperature(T5m_AVG)
  • Chilled Mirror Dew Point(CMHDP)
  • 5m Average Relative Humidity(RH5m_AVG)
  • Instant Present Weather Code(InstPWCod)
  • 1 minute Average Visibility(AvgVis1mi)
  • Chilled Mirror Temperature(CMHTemp)
  • 2m Average Calculated Vapor Pressure(VP2m_AVG)
  • 2m Average Relative Humidity(RH2m_AVG)
  • Standard Deviation of 2m Relative Humidity(RH2m_STD)
  • 1 hour Present Weather Code(PWCod1hr)
  • Cumulative Snow Sum(CumSnow)
  • Standard Deviation of 2m Calculated Dew Point(DP2m_STD)
  • Standard Deviation of 2m Calculated Vapor Pressure(VP2m_STD)
  • QLI Average Reference Temperature(RefTemp_AVG)
  • Standard Deviation of 5m Temperature(T5m_STD)
  • Present Weather Sensor Alarm(PWSAlarm)
  • Standard Deviation of 2m Temperature(T2m_STD)
  • Vector Averaged Wind Speed(WinSpeed_U_WVT)
  • 5m Average Calculated Dew Point(DP5m_AVG)
  • Arithmetic Mean Wind Speed(WinSpeed_S_WVT)
  • Standard Deviation of Vector Averaged Wind Direction(WinDir_SDU_WVT)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Vector Averaged Wind Direction(WinDir_DU_WVT)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • 2m Average Temperature(T2m_AVG)
  • 10 minute Average Visibility(AvgVis10m)
  • Standard Deviation of 5m Calculated Dew Point(DP5m_STD)
  • 5m Average Calculated Vapor Pressure(VP5m_AVG)
  • Standard Deviation of 5m Relative Humidity(RH5m_STD)
  • Cumulative Water Sum(CumH2O)
  • 15 minute Present Weather Code(PWcod15mi)
  • Battery voltage(batt_volt)
  • QLI Average Input Voltage(QLIVolt_AVG)
  • 2m Average Calculated Dew Point(DP2m_AVG)
  • Precipitation Rate(PCPRate)

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DQRID : D041004.3
Start DateStart TimeEnd DateEnd Time
09/18/2004004809/18/20042323
09/19/2004030709/19/20041530
Subject:
NSA/METTWR/C2 - PWS Data Suspect
DataStreams:nsamettwr2hC2.b1
Description:
Data from the PWS is suspect during these times due to problems when the system was 
re-calibrated.  System was corrected.
Measurements:nsamettwr2hC2.b1:
  • 1 hour Present Weather Code(PWCod1hr)
  • Cumulative Snow Sum(CumSnow)
  • 10 minute Average Visibility(AvgVis10m)
  • Present Weather Sensor Alarm(PWSAlarm)
  • Precipitation Rate(PCPRate)
  • Instant Present Weather Code(InstPWCod)
  • Cumulative Water Sum(CumH2O)
  • 15 minute Present Weather Code(PWcod15mi)
  • 1 minute Average Visibility(AvgVis1mi)

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DQRID : D041020.1
Start DateStart TimeEnd DateEnd Time
10/19/2004060010/19/20041200
Subject:
NSA/METTWR/C1 - Sonic - Instrument problem, Contamination, False signal
DataStreams:nsamettwr4hC1.b1
Description:
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.
Measurements:nsamettwr4hC1.b1:
  • Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
  • Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
  • Average Y Component of Sonic Wind Speed(SonicY_AVG)
  • Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
  • Average Sonic Static Speed of Sound(SonicS_AVG)
  • Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
  • Average X Component of Sonic Wind Speed(SonicX_AVG)

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DQRID : D041101.1
Start DateStart TimeEnd DateEnd Time
10/23/2004024511/02/20042325
Subject:
NSA/METTWR/C1 - Instrument problem, Frosting/Condensation
DataStreams:nsamettwr4hC1.b1
Description:
The 2m T & RH values were not in very good agreement with the CMH data or the other tower 
levels.  A failed aspirator fan caused the readings to be incorrect.
Measurements:nsamettwr4hC1.b1:
  • 2m Average Calculated Vapor Pressure(VP2M_AVG)
  • Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
  • Standard Deviation of 2m Relative Humidity(RH2M_STD)
  • 2m Average Relative Humidity(RH2M_AVG)
  • Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
  • 2m Average Temperature(T2M_AVG)
  • Standard Deviation of 2m Temperature(T2M_STD)
  • 2m Average Calculated Dew Point(DP2M_AVG)

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DQRID : D050527.2
Start DateStart TimeEnd DateEnd Time
10/31/2003000005/26/20051014
Subject:
NSA/METTWR/C1 - Incorrect Maximum for Precip Values
DataStreams:nsamettwr4hC1.b1
Description:
The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are 
incorrect.  In communication with the manufacturer it has been found that the manual was in 
error.  The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 
999.99 mm/hr.
Measurements:nsamettwr4hC1.b1:
  • Precipitation Rate(PcpRate)
  • Cumulative Water Sum(CumH2O)

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DQRID : D050527.3
Start DateStart TimeEnd DateEnd Time
11/06/2003000005/26/20051014
Subject:
NSA/METTWR/C2 - Incorrect Maximum for Precip Values
DataStreams:nsamettwr2hC2.b1
Description:
The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are 
incorrect.  In communication with the manufacturer it has been found that the manual was in 
error.  The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 
999.99 mm/hr.
Measurements:nsamettwr2hC2.b1:
  • Precipitation Rate(PCPRate)
  • Cumulative Water Sum(CumH2O)

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DQRID : D051025.2
Start DateStart TimeEnd DateEnd Time
10/31/2003000009/14/20051420
Subject:
NSA/METTWR/C1 - Data 1-minute behind
DataStreams:nsamettwr4hC1.b1
Description:
Data from the Barometer, Chilled Mirror Hygrometer and the Present Weather Sensor were 
one-minute behind due to timing problems collecting data from the Serial Data Multiplexer 
that handled these sensors.
Measurements:nsamettwr4hC1.b1:
  • 15 minute Present Weather Code(PwCod15mi)
  • 1 minute Average Visibility(AvgVis1mi)
  • Chilled Mirror Dew Point(CMHDP)
  • Instant Present Weather Code(InstPwCod)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • 1 hour Present Weather Code(PwCod1hr)
  • Cumulative Snow Sum(CumSnow)
  • 10 minute Average Visibility(AvgVis10m)
  • Chilled Mirror Temperature(CMHTemp)
  • Precipitation Rate(PcpRate)
  • Cumulative Water Sum(CumH2O)
  • Present Weather Sensor Alarm(PWSAlarm)
  • Atmospheric Pressure(AtmPress)

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DQRID : D051101.4
Start DateStart TimeEnd DateEnd Time
10/31/2003000010/20/20051900
Subject:
NSA/METTWR/C1 - Reprocess: Wind direction data incorrect
DataStreams:nsamettwr4hC1.b1
Description:
Wind direction data is off by 30 degrees for all wind sensors.  The 40-m tower was 
misaligned to true north.
Measurements:nsamettwr4hC1.b1:
  • 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
  • 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
  • 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
  • Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
  • 10m Vector Averaged Wind Direction(WD10M_DU_WVT)

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DQRID : D060817.4
Start DateStart TimeEnd DateEnd Time
10/31/2003000007/12/20061608
Subject:
NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa
DataStreams:nsamettwr4hC1.b1
Description:
Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.
Measurements:nsamettwr4hC1.b1:
  • Atmospheric Pressure(AtmPress)

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DQRID : D060818.1
Start DateStart TimeEnd DateEnd Time
11/06/2003000007/12/20061853
Subject:
NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPa
DataStreams:nsamettwr2hC2.b1
Description:
Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.
Measurements:nsamettwr2hC2.b1:
  • Atmospheric Pressure(AtmPress)

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