SGP/MET/E27 - Rain Values Incorrect

Rainfall reported as 600mm.  This value is incorrect.  Reason unknown; maintenance on this 
facility ceased 10/1/2009.

• Corrected total precipitation measured by TBRG(tbrg_precip_total_corr)
• tbrg_precip_total

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/E4 - Wind sensor frozen

Icing resulted in flatlined wind speed and direction measurements.

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

SGP/MET/E20 - Rain Gauge Cable Chewed by Rodents

The rain gauge cable was damaged by rodents.  At the beginning of the time period, the 
data was falsely indicating nearly constant precipitation. Later it was falsely reporting no 
precipitation during a large rain event.

Data are not recoverable.

• Corrected total precipitation measured by TBRG(tbrg_precip_total_corr)
• tbrg_precip_total

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