SGP/MET/E9 - Wind Speed Data Incorrect

Wind speed sensor reference wire became detached.  This caused all wind sensor data to 
report near 0 m/s.

• Wind speed vector mean(wspd_vec_mean)
• qc_wspd_vec_mean
• qc_wspd_arith_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/MET/E21 - Wind Sensor Inoperative Due to Ice

Due to an ice storm the wind sensor was inoperative.

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

SGP/MET/E11 - Intermittent incorrect windspeed

Starting on 10/20 the wind speed values intermittently flatlined.  Site operations 
reseated cable on 11/1.

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

SGP/MET/E13 - PWD data incorrect/missing

Data collection problems during the time period specified resulted in incorrect or missing 
PWD data.

• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• pwd_cumul_snow
• pwd_precip_rate_mean_1min
• pwd_pw_code_15min
• pwd_pw_code_1hr
• pwd_pw_code_inst
• pwd_err_code

SGP/MET/E13 - Missing PWD data

PWD data were missing due to an accidental reset on the instrument.

• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• pwd_cumul_snow
• pwd_precip_rate_mean_1min
• pwd_pw_code_15min
• pwd_pw_code_1hr
• pwd_pw_code_inst
• pwd_err_code

SGP/MET/E21 - TimeCheck Error

Starting on 2010-06-07 the E21 system clock started drifting until the problem was 
corrected on 2010-06-29.  The maximum daily offset reported in the collection logs were:

Jun 7 offset:	  -5.04
Jun 8  Offset:	  -267.449039
Jun 9  Offset:	  -541.038624
Jun 10 Offset:	  -814.469141
Jun 11 Offset:	  -1076.862114
Jun 12 Offset:	  -1350.330223
Jun 13 Offset:	  -1623.639335
Jun 14 Offset:	  -1897.047754
Jun 15 Offset:	  -2170.552312
Jun 16 Offset:	  -2422.130746
Jun 17 Offset:	  -2684.607495
Jun 18 - Jun 22 (unknown)
Jun 23 Offset:	  -4204.730579

If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect 
time. The met data will be correct but the corresponding time stamp cannot be accurately 
known or simply corrected.

• wdir_vec_std
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_mean
• qc_wspd_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_atmos_pressure
• Corrected total precipitation measured by TBRG(tbrg_precip_total_corr)
• tbrg_precip_total
• Barometric Pressure(atmos_pressure)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• qc_wdir_vec_std
• time
• qc_temp_mean
• base_time
• qc_rh_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• time_offset
• qc_vapor_pressure_mean
• Mean Air Temperature or Hardware Error(temp_mean)
• qc_tbrg_precip_total
• qc_tbrg_precip_total_corr
• qc_time
• qc_wspd_arith_mean

SGP/MET/E9 - Time-stamp uncertainty

Between 20100503 and 20100507 the sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks 
were drifting outside the allowable +/-3 seconds.  During the specified period, the 
swings ranged from -326 to +637 seconds.

• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_temp_mean
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• qc_wdir_vec_std
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Barometric Pressure(atmos_pressure)
• qc_rh_mean
• qc_wspd_vec_mean
• time
• Corrected total precipitation measured by TBRG(tbrg_precip_total_corr)
• qc_tbrg_precip_total
• qc_vapor_pressure_mean
• Mean Air Temperature or Hardware Error(temp_mean)
• qc_tbrg_precip_total_corr
• wdir_vec_std
• vapor_pressure_mean
• base_time
• time_offset
• tbrg_precip_total
• qc_time
• qc_wspd_arith_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_atmos_pressure

SGP/MET/E11 - Wind speed incorrect

Starting on 05/14 the wind speed values at E11 intermittently flat-lined.  The connections 
were reseated 5/18.

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/MET/E9 - RH probe failure

The T/RH probe failed. The resulting problem led to very unreasonable values of RH (~160%) 
which caused the vapor pressure values to also be incorrect.

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