NSA/TWR/C1 - 40m T/RH sensor noise

40m T/RH sensor spiked on 5/17/12, then remained noisy mostly at high humidity. Sensor 
replacement during tower maintenance on 8/1/12 has resolved the issue.

• dew_point_mean
• rh_std
• Temperature mean(temp_mean)
• temp_std
• vapor_pressure_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• vapor_pressure_std
• dew_point_std
• trh_err_code

NSA/MET/C1 - 10m wind data not reporting

10 meter wind speed and direction data were not reporting after a scheduled power outage 
took place.   Sensor was replaced.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

NSA/MET/C1 - 20m T/RH sensor failure

The 20 meter temperature, dew point, and humidity data were spiking and reporting high/low 
in relation to other sensors on the tower.  Sensor was replaced.

• dew_point_mean
• rh_std
• Temperature mean(temp_mean)
• temp_std
• vapor_pressure_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• vapor_pressure_std
• dew_point_std

NSA/MET/C1 - Tower maintenance

Data not representative due to tower instrument maintenance.

• wdir_vec_std
• rh_std
• qc_rh_mean
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_temp_mean
• vapor_pressure_mean
• vapor_pressure_std
• trh_err_code
• qc_wspd_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_wdir_vec_mean
• dew_point_mean
• qc_dew_point_mean
• Temperature mean(temp_mean)
• temp_std
• Wind speed vector mean(wspd_vec_mean)
• dew_point_std
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_vapor_pressure_mean

NSA/MET/C1 - Incorrect 20m wind data

The 20 meter wind data flatline due to a loss of communication settings.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

NSA/MET/C1 - Incorrect 2m wind data

The 2 meter wind data flatlines due to a loss of communication settings.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

NSA/MET/C1 - Power outage

Incorrect data due to power outage.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• vapor_pressure_mean
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_std

NSA/TWR/C1 - 40m temp/humidity problem

A problem with the temp/humidity sensor at the 40m level caused incorrect data to be 
recorded. Between 5/10/14 and 5/16/14, dew point, relative humidity, and vapor pressure data 
are occasionally incorrect (vastly different when compared with other levels). Beginning 
6/5/14, the data go missing entirely until a sensor exchange occurred on 7/15/2014.

• dew_point_mean
• Temperature mean(temp_mean)
• vapor_pressure_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)

NSA/TWR/C1 - 40m wind sensor outage

Wind direction and speed at the 40 meter level are missing during this time due to 
incorrect sensor configuration.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

NSA/TWR/C1 - Reprocessing Notice (RID 1240)

See below for details of reprocessing that was completed on 20150626.  Original 
DQR category: 4 (Red, Incorrect).

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The 10m temperature and relative humidity fields are swapped during this time (and 
corresponding standard deviation fields). The 40m temperature and relative humidity fields are 
swapped during this time (and corresponding standard deviation fields). The raw data will 
be corrected and reprocessed to fix this issue. The 10m and 40m error codes are incorrect 
and will not be fixed.

• rh_std
• Temperature mean(temp_mean)
• temp_std
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• trh_err_code

NSA/TWR/C1 - 2m Temp/RH instrument offline

A broken wire caused missing data from the 2m temp/relative humidity sensor during this 
time.

• dew_point_mean
• Temperature mean(temp_mean)
• vapor_pressure_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• trh_err_code

NSA/MET/C1 - Reprocessing Notice (RID 1252)

See below for details of reprocessing that was completed on 20150109.  Original 
DQR category: 4 (Red, Incorrect).

-----------------------------------------------------------

The wind direction data are 30 degrees too high due to an alignment/offset problem during 
this time. Problem affects all 4 tower levels in the nsatwrC1.b1 datastream, as well as 
the wind direction data in the nsametC1.b1 datastream. Data will be reprocessed for 
correction.

• wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)

NSA/TWR/C1 - 40m wind data missing

There was a communication problem with the 40m wind sensor. Data are missing during the 
indicated time period.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

NSA/TWR/C1 - Tower maintenance

Tower was lowered for annual T/RH sensor exchanges. Data may not be representative of 
conditions at stardard heights.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• dew_point_mean
• rh_std
• Temperature mean(temp_mean)
• temp_std
• Wind direction vector mean(wdir_vec_mean)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• vapor_pressure_mean
• Wind speed vector mean(wspd_vec_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• vapor_pressure_std
• dew_point_std
• trh_err_code

NSA/TWR/C1 - 10m T/RH possible bias

A calibration check showed questionable agreement of relative humidity with the test 
probe. The sensor was replaced with a newly calibrated unit. 10m relative humidity values are 
suspect during this time.

• dew_point_mean
• rh_std
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• dew_point_std

NSA/TWR/C1 - Wind data missing at 40 meter level

40 meter wind sensor lost configuration settings resulting in missing data.

• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)