PYE/MET/M1 - Deployment period

During the listed time period, the AMF was in the beginning phase of deployment.  Data 
during this time may not be representative and should be used with caution.

• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Barometric Pressure(atmos_pressure)
• alt
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• rh_std
• pwd_pw_code_1hr
• Mean Air Temperature or Hardware Error(temp_mean)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• vapor_pressure_std
• pwd_precip_rate_mean_1min
• pwd_cumul_rain
• time
• pwd_err_code
• lat
• logger_temp
• time_offset
• temp_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• base_time
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• lon
• pwd_pw_code_inst
• vapor_pressure_mean
• Wind speed vector mean(wspd_vec_mean)
• ORG precipitation rate mean(org_precip_rate_mean)
• pwd_pw_code_15min
• wdir_vec_std
• logger_volt

NIM/MET/M1 - Software problem

Intermittent Failure of Logger to read data from the Barometer.

• Barometric Pressure(atmos_pressure)

NIM/MET/M1  - ORG failure

The optical rain gauge on the met system did not record precipitation during this time 
period.

• ORG precipitation rate mean(org_precip_rate_mean)

FKB/MET/M1 - Optical Rain Gauge Data Incorrect

The optical rain gauge (ORG) data was incorrect during the listed times.  Ice/frost was 
forming on the lenses causing the ORG to believe there was precipitation occurring.

• ORG precipitation rate mean(org_precip_rate_mean)

FKB/MET/M1 - ORG Data incorrect during calibration

The ORG data was incorrect during calibration checks.  The check mimics a precipitation 
event so the precip amounts that were collected were not actually measured.

• ORG precipitation rate mean(org_precip_rate_mean)

FKB/MET/M1 - Incorrect ORG data

Precipitation was being reported on days with no rain.  Problems with the grounding and 
the orientation of the receiver facing south (sunlight in the optics) caused erroneous 
readings.

• ORG precipitation rate mean(org_precip_rate_mean)

FKB/MET/M1 - ORG reporting precip constantly

During the time period listed the ORG reported precip consistently.  Reason unknown as 
deployment ended before resolution of problem.

• ORG precipitation rate mean(org_precip_rate_mean)

NIM/MET/M1 - ORG underestimated precipitation

The ORG underestimated precipitation by about 38% during the entire NIM deployment.  No 
troubleshooting technique or replacement of gauge was successful in correcting the problem.

• ORG precipitation rate mean(org_precip_rate_mean)

NIM/MET/M1/S1 - Reprocess: ORG Data has very small rainrate values

The ORG data is collected via analog signal and not digital.  Therefore, we
   continuously collect data even when no rain is occurring.  We also capture
   small events such as leaves, large bugs, dust, etc blowing through the
   measurement path.  Because this discrete event occurs quickly the value is
   usually captured for 1 or 2 seconds.  This value is then averaged to the
   minute producing rainrate on the order of .009 mm/hr or less.  These values
   are not indicative of rain and should be removed from the record or summing
   over long periods can bias the climate record.  We are reprocessing the data
   to remove these small values and are adjusting the collection program to
   remove them before ingest.

• Rain, surface, 1-min avg(precip_rate_mean)
• precip_rate_sd
• precip_rate_max
• precip_rate_min

PYE/MET/M1 - Wind Speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

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

NIM/MET/M1 - Wind Speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

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

NIM/MET/S1 - Wind Speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

• wind_spd_arith_min
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• wind_spd_arith_max
• wind_spd_arith_sd

HFE/MET/M1 -  Wind speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

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

FKB/MET/M1 - Wind Speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

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

HFE/MET/M1 - Intermittent barometer failure

Intermittent barometer failure occurred throughout the deployment.  We were unable to 
pinpoint the cause of the failure.  Typically one or two minutes of missing data occurred 
every few days.

Since pressure data is typically invariant over 1 minute, linear interpolation should be 
fine to fill in missing data.

• Barometric Pressure(atmos_pressure)

HFE/MET/M1 - Intermittent PWD data

The Present Weather Detector had intermittent missing values throughout this deployment.  
Missing values occurred almost everyday, usually just one or two minutes per day.

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

HFE/MET/M1 - ORG measuring ice crystals or fog

The ORG was measuring consistent values for long periods of time.  Typically this is 
indicative of fog, ice crystals in the air or poor performance of the lens heaters.

• ORG precipitation rate mean(org_precip_rate_mean)

HFE/MET/M1 - Induced voltage on wind speed sensor cable

The cable for the wind monitor is not a twisted pair shielded cable.  This caused an 
induced voltage on the wind sensor wires from the wind direction measurement excitation 
voltage.  A small offset is added into the wind speeds.  This value varies.  Most frequently 
the values of 0.49, 0.588 and 0.686 m/s were added into the wind speed.  On 11/27/2008 the 
value jumped to 0.98 m/s for most of the day.

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

NSA/MET/C1 - Temp/RH/wind data questionable

New wind sensors and new T/RH probes were being installed during this time period.  The 
tower booms were lowered and much of the data collected were not at listed heights nor were 
the data accurate due to configurations during install.

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

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

NSA/MET/C1 - PWS data missing due to snow impaction

Blizzard conditions caused the optics to become impacted with snow and ice rendering the 
Present Weather Detector inoperative.

• qc_pws_cumul_snow
• qc_pws_pw_code_15min
• qc_pws_precip_rate_mean_1min
• PWS 10 minute mean visibility(pws_vis_mean_10min)
• qc_pws_cumul_rain
• pws_err_code
• qc_pws_vis_mean_1min
• pws_cumul_rain
• pws_pw_code_1hr
• pws_cumul_snow
• Rain, surface, 1-min avg(pws_precip_rate_mean_1min)
• pws_pw_code_15min
• qc_pws_pw_code_inst
• pws_pw_code_inst
• qc_pws_pw_code_1hr
• qc_pws_err_code
• qc_pws_vis_mean_10min
• PWS 1 minute mean visibility(pws_vis_mean_1min)

NSA/MET/C1 - Wind data intermittent

There was a loose wire on the serial data multiplexer causing the wind data to become 
missing during high wind situations.  The high winds caused the enclosure to vibrate making 
the connection intermittent.

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

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

NSA/MET/C1 - CMH data missing

The data from the CMH was missing during these times due to a failing logic board.  The 
board was replaced.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

HFE/MET/S1 - Barometer missing

All spare barometers and the working barometer for this supplemental site were damaged 
during shipment.  They were sent in for repair and recalibration.

• Barometric Pressure(atmos_pressure)

HFE/MET/S1 - Optical Rain Gage Failed

All data collected by the ORG is of no use.  The ORG had failed and any data collected was 
not indicative of the current weather.

• precip_rate_max
• precip_rate_sd
• Rain, surface, 1-min avg(precip_rate_mean)
• org_carrier_mean
• precip_rate_min

HFE/MET/S1 - Wind Data Incorrect

The wind sensor became disconnected and no wind speed or direction data were collected.

• wind_dir_sd
• wind_spd_arith_min
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• wind_spd_arith_max
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• wind_spd_arith_sd
• Vector-averaged Wind Direction(wind_dir_vec_avg)

GRW/MET/M1 - Tower lowered during installation

Data was collected during set up and installation.  Any data collected is suspect due to 
the tower being lowered and calibration checks occurring.  The data should be viewed 
critically before being used.

• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_mean
• pwd_err_code
• rh_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• pwd_pw_code_inst
• Barometric Pressure(atmos_pressure)
• wdir_vec_std
• temp_std
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• vapor_pressure_std
• ORG precipitation rate mean(org_precip_rate_mean)
• pwd_precip_rate_mean_1min
• Wind speed vector mean(wspd_vec_mean)
• pwd_cumul_rain
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• pwd_pw_code_15min
• pwd_pw_code_1hr

NSA/MET/C1 - Met data incorrect during calibration

All met data from the tower booms (temp, RH, winds and derived variables) were incorrect 
due to the booms being lowered from their measurement heights.  Additionally, the 
scaffolding was located directly adjacent to the booms affecting the wind field and the Temp/RH 
data.

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

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

NSA/MET/C1 - PWS calibration

The PWS was undergoing calibration. Any data collected during this time is not 
representative of the atmospheric state.

• qc_pws_cumul_snow
• qc_pws_pw_code_15min
• qc_pws_precip_rate_mean_1min
• PWS 10 minute mean visibility(pws_vis_mean_10min)
• qc_pws_cumul_rain
• pws_err_code
• qc_pws_vis_mean_1min
• pws_cumul_rain
• pws_pw_code_1hr
• pws_cumul_snow
• Rain, surface, 1-min avg(pws_precip_rate_mean_1min)
• pws_pw_code_15min
• qc_pws_pw_code_inst
• pws_pw_code_inst
• qc_pws_pw_code_1hr
• qc_pws_err_code
• qc_pws_vis_mean_10min
• PWS 1 minute mean visibility(pws_vis_mean_1min)

NSA/MET/C1 - CMH calibration

CMH data missing due to removal of the sensor for annual calibration.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - 2m RH values incorrect

The new t/rh probe installed during annual calibrations and checks began to exhibit 
readings that were biased high compared to the Chilled Mirror Hygrometer.  In high RH 
conditions the sensor would consistently report RH values in excess of 105%.  Comparisons to the 
other tower levels also suggested that the 2m level RH data is suspect.

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

• rh_std
• qc_rh_mean
• vapor_pressure_mean
• vapor_pressure_std
• dew_point_mean
• qc_dew_point_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• dew_point_std
• qc_vapor_pressure_mean

GRW/MET/M1 - Temperature/RH aspirator failure

The aspirator fan on the solar shield failed causing incorrect readings on the temp, RH 
and calculated variables.

• Mean Air Temperature or Hardware Error(temp_mean)
• vapor_pressure_std
• vapor_pressure_mean
• rh_std
• temp_std
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)

NSA/MET/C2 - CMH Data Incorrect During Maintenance

Data was incorrect as the CMH was offline and undergoing maintenance.

• qc_cmh_vapor_pressure
• cmh_sat_vapor_pressure
• qc_cmh_rh
• qc_cmh_dew_point
• cmh_rh
• qc_cmh_temp
• cmh_temp
• cmh_dew_point
• qc_cmh_sat_vapor_pressure
• cmh_vapor_pressure

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

NIM/MET/M1 - PWD cumulative precipitation incorrect

The Present Weather Detector is a serial sensor.  The MET system datalogger reads in the 
data from this sensor.  During the time in question serial comms problems were causing the 
data from the sensor to be read incorrectly.  The data for one variable showed up in 
data for another variable or not at all.  We reprocessed the data to correct as much of this 
error as we could.  The cumulative rainfall variable was calculated from the 
instantaneous rainfall variable during reprocessing.  Since we cannot be entirely sure all 
cumulative rainfall values are correct or were completely captured the cumulative rainfall data is 
considered to be unreliable.  This issue shows up when comparing the cumulative rainfall 
data at the end of the day 07/31/2006 (79.08) and the beginning of the next day 
08/01/2006 (3.17).  Clearly we were either under or over-estimating the cumulative rainfall.

• pwd_cumul_rain

NIM/MET/M1 - PWD 1 minute rainfall data suspect

The Present Weather Detector is a serial sensor.  The MET system datalogger reads in the 
data from this sensor.  During the time in question serial comms problems were causing the 
data from the sensor to be read incorrectly.  The data for one variable showed up in 
data for another variable or not at all.  We reprocessed the data to correct as much of this 
error as we could. We cannot be entirely certain that all rainfall values are correct or 
were captured properly.  It is possible that some values were missed completely.

• pwd_precip_rate_mean_1min

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)

NSA/MET/C1 - CMH and 10m winds failure

At 0513GMT on 1/23 the atmos_pressure and CMH - temp, RH, DP & Sat. VP changed abruptly to 
unlikely values. The 10m winds failed at 1420GMT.

The CMH was repaired on 02/04/2010 at 2254GMT and the 10m winds sensor was replaced on 
02/05/2010 at 2100GMT.

• cmh_dew_point
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_wspd_arith_mean
• qc_cmh_dew_point
• qc_wspd_vec_mean
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• cmh_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• qc_cmh_rh
• cmh_temp
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• cmh_rh

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)

NSA/MET/C1 - CMH Data Missing

The GFCI had tripped causing the CMH to lose power.  All CMH variables are missing except 
CMHRH which reports 100% for the entire time.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

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

NSA/MET/C1 - CMH Sent to Vendor for Repair

CMH connector on the transmitter enclosure that goes to the head unit degraded and failed. 
 System was removed and sent to the manufacturer for repair.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - CMH offline

CMH removed for repair.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - 10m wind sensor offline

The 10m wind sensor values were 0 m/s and 000 for wind direction. The sensor lost 
communications.

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

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

SBS/MET/M1 - Atmospheric pressure spikes

A nearby AC unit was causing +/-.05 (approx.) changes in pressure values, most frequently 
during the daylight hours but occasionally over night.  Corrective action was taken to 
shield the sensor 1/28.

• Barometric Pressure(atmos_pressure)

SBS/MET/M1 - Site setup

The instruments were being setup and installed during this period.  Some data may be 
questionable and minimal quality reporting will be done.

• precip_rate_min
• precip_rate_max
• pwd_err_code
• temp_sd
• time_offset
• relh_sd
• pwd_pw_code_15_min
• Barometric Pressure(atmos_pressure)
• pwd_cumul_snow
• Average 1 min visibility(pwd_avg_vis_1_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• pwd_pw_code_1_hr
• wind_spd_arith_min
• pwd_id
• wind_dir_sd
• time
• wind_spd_arith_max
• pwd_avg_H2O_int_1_min
• pwd_pw_code_inst
• alt
• lat
• logger_voltage
• Mean Air Temperature or Hardware Error(temp_mean)
• Vapor pressure mean(vappress_mean)
• Rain, surface, 1-min avg(precip_rate_mean)
• base_time
• Average 10 min visibility(pwd_avg_vis_10_min)
• Relative humidity mean(relh_mean)
• org_carrier_mean
• lon
• vappress_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• pwd_cumul_water
• precip_rate_sd
• logger_temp
• wind_spd_arith_sd

NSA/MET/C1 - CMH offline

Beginning 1/24/2011, the CMH went offline resulting in missing temperature and dewpoint 
measurements and erroneous vapor pressure, saturation vapor pressure, and RH measurements. 

Problem fixed with a power cycle.

• cmh_dew_point
• cmh_temp
• cmh_vapor_pressure
• cmh_sat_vapor_pressure
• cmh_rh

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

SBS/MET/M1 - Incorrect atmospheric pressure

The atmospheric pressure readings showed a ~.3 - 1 mb oscillatory behavior. The sensor 
tube was found to be obstructed. It was fixed and  proper function resumed.

• Barometric Pressure(atmos_pressure)

SGP/MET/E6 - Intermittent missing atmos pressure data

Atmospheric pressure data were intermittently missing during the period specified.  No 
known reason for the missing data.

• Barometric Pressure(atmos_pressure)

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

NSA/MET/C1 - CMH Failure

The Chilled Mirror Hydrometer (CMH) developed a short in the wiring harness. All CMH data 
missing or incorrect during the period listed.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

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)

NSA/MET/C1 - Wind sensor data missing

2m, 10m, 20m wind sensors went off-line 5/17 due to GFCI tripping caused by failing CMH.   
The 2m and 20m data wind sensor returned 6/6, but the 10m remained offline until 7/20 as 
the sensor was damaged.

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

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

SGP/MET/E7 - T/RH values incorrect

The temperature, RH, and vapor pressure data were incorrect due to a loose connection.

• vapor_pressure_mean
• Mean Air Temperature or Hardware Error(temp_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)

GAN/MET/M1 - Tower lowered and tipped for maintenance

The met tower was lowered for a PIR replacement. All met tower data are questionable 
during this period.

• precip_rate_max
• precip_rate_min
• wind_spd_arith_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Rain, surface, 1-min avg(precip_rate_mean)
• Vapor pressure mean(vappress_mean)
• precip_rate_sd
• Relative humidity mean(relh_mean)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Barometric Pressure(atmos_pressure)
• pwd_err_code
• Mean Air Temperature or Hardware Error(temp_mean)
• pwd_pw_code_inst
• pwd_cumul_water
• logger_voltage
• pwd_pw_code_1_hr
• wind_dir_sd
• wind_spd_arith_max
• vappress_sd
• Average 10 min visibility(pwd_avg_vis_10_min)
• wind_spd_arith_min
• pwd_avg_H2O_int_1_min
• pwd_cumul_snow
• pwd_pw_code_15_min
• pwd_id
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• logger_temp
• Average 1 min visibility(pwd_avg_vis_1_min)
• temp_sd
• org_carrier_mean
• relh_sd

NIM/MET/M1 - Deployment period

All data from the met tower are suspect during this time period as the systems were being 
deployed and in various states of operation.

• ORG precipitation rate mean(org_precip_rate_mean)
• time
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• logger_temp
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_precip_rate_mean_1min
• Mean Air Temperature or Hardware Error(temp_mean)
• pwd_err_code
• Barometric Pressure(atmos_pressure)
• pwd_cumul_rain
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_mean
• vapor_pressure_std
• rh_std
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• temp_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• alt
• time_offset
• pwd_pw_code_inst
• logger_volt
• lat
• lon
• base_time
• pwd_pw_code_1hr
• pwd_pw_code_15min
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

GAN/MET/M1 - Met data questionable

Met data are questionable during this time period as the system was being deployed and in 
various states of operation.

• lat
• precip_rate_max
• precip_rate_min
• wind_spd_arith_sd
• time_offset
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• lon
• Rain, surface, 1-min avg(precip_rate_mean)
• Vapor pressure mean(vappress_mean)
• precip_rate_sd
• base_time
• Relative humidity mean(relh_mean)
• alt
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Barometric Pressure(atmos_pressure)
• pwd_err_code
• Mean Air Temperature or Hardware Error(temp_mean)
• pwd_pw_code_inst
• logger_voltage
• pwd_cumul_water
• pwd_pw_code_1_hr
• time
• wind_dir_sd
• wind_spd_arith_max
• vappress_sd
• Average 10 min visibility(pwd_avg_vis_10_min)
• wind_spd_arith_min
• pwd_avg_H2O_int_1_min
• pwd_cumul_snow
• pwd_pw_code_15_min
• pwd_id
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• logger_temp
• Average 1 min visibility(pwd_avg_vis_1_min)
• temp_sd
• org_carrier_mean
• relh_sd

GAN/MET/M1 - Intermittent PWD alarm

Intermittent backscatter alarms were tripping on the PWD suggesting something was blocking 
(dew) or getting into the measurement path (spider or ants).  Problem resolved 10/9 with 
no clear indication of the cause.

• pwd_pw_code_15_min
• pwd_id
• pwd_pw_code_inst
• pwd_pw_code_1_hr
• pwd_cumul_water
• Average 1 min visibility(pwd_avg_vis_1_min)
• Average 10 min visibility(pwd_avg_vis_10_min)
• pwd_avg_H2O_int_1_min
• pwd_err_code
• pwd_cumul_snow

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

NSA/MET/C1 - CMH communication failure

CMH lost communication with datalogger. All values from CMH were -6999 during this time 
resulting in the CMHRH flatlining at 100%. Communications was intermittent during entire 
time period.

• cmh_dew_point
• cmh_temp
• cmh_vapor_pressure
• cmh_sat_vapor_pressure
• cmh_rh