Data Quality Reports for Session: 145814 User: martino1ca Completed: 11/06/2012


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000608.7TWP/C2/SMET Wind Speedstwpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
D000608.8TWP/C2/SMET Wind Speedstwpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
D000608.9TWP/C2/SMET Winds Speedstwpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
D000613.2TWP/C2/SMET Temperature spiketwpsmet60sC2.a1, twpsmet60sC2.b1
D000613.3TWP/C2/SMET - Pressure sensitivity to raintwpsmet60sC2.a1, twpsmet60sC2.b1
D020109.2TWP/SMET/C2 - RH Sensor bad at Naurutwpsmet60sC2.a1, twpsmet60sC2.b1
D020329.8TWP/SMET/C1/C2 - Switch to new Data Header Formats not timelytwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1
D020613.9TWP/C2 Installationtwpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
D030131.1TWP/SMET/C2 - Temperature Sensor Failed, Data Missingtwpsmet60sC2.a1, twpsmet60sC2.b1
D030501.5TWP/SMET/C2 - Upper wind sensor failedtwpsmet60sC2.b1
D040421.1TWP/SMET/C2 - Lower wind sensor failuretwpsmet60sC2.b1
D040722.7TWP/SMET/C2 - connection and timing issues with new loggertwpsmet60sC2.b1
D040726.1TWP/SMET/C2 - Negative rainfall ratestwpsmet60sC2.b1
D040824.2TWP/SMET/C2 - Incorrect rainrate equation used.twpsmet60sC2.b1
D050301.1TWP/SMET/C2 - Upper wind direction sensor failuretwpsmet60sC2.b1
D050322.2TWP/SMET/C2 - Upper wind direction sensor failuretwpsmet60sC2.b1
D050714.1TWP/SMET/C2 - RH sensor failuretwpsmet60sC2.b1
D050920.4TWP/SMET/C2 - Instrument maintenancetwpsmet60sC2.b1
D050921.2TWP/SMET/C2 - ORG data incorrecttwpsmet60sC2.b1
D051005.6TWP/SMET/C2 - Tower down for calibration activitiestwpsmet60sC2.b1
D060614.2TWP/SMET/C2 - Temp/RH probe failuretwpsmet60sC2.b1
D060818.2TWP/SMET/C2 - Reprocess: Barometric pressure units change twpsmet60sC2.b1
D061011.3TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge addedtwpsmet60sC2.b1
D061214.2TWP/SMET/C2 - Barometer failuretwpsmet60sC2.b1
D070510.5TWP/SMET/C2 - Lower windspeed sensor questionabletwpsmet60sC2.b1
D070520.1TWP/SMET/C2 - Lower Wind Sensor Direction Incorrecttwpsmet60sC2.b1
D071219.1TWP/SMET/C2 - Lower Wind Speed Data Suspecttwpsmet60sC2.b1
D080428.4TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate valuestwpsmet60sC2.b1
D080617.1TWP/SMET/C2 - ORG rainfall measurements too largetwpsmet60sC2.b1
D080922.4TWP/SMET/C2 - Missing datatwpsmet60sC2.b1
D081022.5TWP/SMET/C2 - Wind Speed data contain offset due to induced voltagetwpsmet60sC2.b1
D081027.2TWP/SMET/C2 - ORG rainrate high due to calibration.twpsmet60sC2.b1
D090604.2TWP/SMET/C2 - Barometer data incorrecttwpsmet60sC2.b1
D090918.1TWP/SMET/C2 - Induced wind speed when calmtwpsmet60sC2.b1
D091030.2TWP/SMET/C2 - Tower Lowered for Maintenancetwpsmet60sC2.b1
D100303.3TWP/SMET/C2 - Barometer failuretwpsmet60sC2.b1


DQRID : D000608.7
Start DateStart TimeEnd DateEnd Time
12/24/1998000001/08/19992100
Subject:
TWP/C2/SMET Wind Speeds
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
Description:
Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.
Measurements:twpsmet60sC2.b1:
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • wind1_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 direction vector average(wind1_dir_vec_avg)

twpsmetC2.00:
  • Raw data stream - documentation not supported

twpsmet60sC2.a1:
  • wind1_spd_sd
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)


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DQRID : D000608.8
Start DateStart TimeEnd DateEnd Time
01/09/1999230001/10/19990600
Subject:
TWP/C2/SMET Wind Speeds
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
Description:
Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.
Measurements:twpsmet60sC2.b1:
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • wind1_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 direction vector average(wind1_dir_vec_avg)

twpsmetC2.00:
  • Raw data stream - documentation not supported

twpsmet60sC2.a1:
  • wind1_spd_sd
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)


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DQRID : D000608.9
Start DateStart TimeEnd DateEnd Time
01/14/1999143001/14/19992100
Subject:
TWP/C2/SMET Winds Speeds
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
Description:
Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.
Measurements:twpsmet60sC2.b1:
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • wind1_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 direction vector average(wind1_dir_vec_avg)

twpsmetC2.00:
  • Raw data stream - documentation not supported

twpsmet60sC2.a1:
  • wind1_spd_sd
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_dir_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)


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DQRID : D000613.2
Start DateStart TimeEnd DateEnd Time
12/03/1998210512/03/19992105
Subject:
TWP/C2/SMET Temperature spike
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
There was a brief -4 C spike in the temperature at approximately
21.5 Z on December 3.  This spike also showed up in the vapor pressure
which is calculated from the temperature and relative humidity.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • Temperature maximum(temp_max)
  • temp_sd
  • Temperature minimum(temp_min)
  • Vapor pressure mean(vappress_mean)
  • Mean Air Temperature or Hardware Error(temp_mean)

twpsmet60sC2.a1:
  • Mean Air Temperature or Hardware Error(temp_mean)
  • temp_sd
  • Vapor pressure mean(vappress_mean)
  • Temperature maximum(temp_max)
  • vappress_sd
  • Temperature minimum(temp_min)


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DQRID : D000613.3
Start DateStart TimeEnd DateEnd Time
11/20/1998000012/31/19982359
Subject:
TWP/C2/SMET - Pressure sensitivity to rain
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
The pressure behaves anomalously during rain events - even very mild
ones.  Normally, the pressure undergoes a smooth semi-diurnal
oscillation with little higher frequency variability.  However, during
and shortly after rain events, the pressure signal exhibits abrupt
changes - this sort of behavior has occasionally been observed at
Manus but not with the regularity seen here.  Examples of this
behaviour occur on (date in the form YYYYMMDD):

19981212
19981215
19981216
19981217
19981223
19981224
19981225
19981230
19981231
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • Vapor pressure mean(vappress_mean)
  • Barometric Pressure(atmos_pressure)

twpsmet60sC2.a1:
  • Barometric Pressure(atmos_pressure)
  • Vapor pressure mean(vappress_mean)
  • vappress_sd


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DQRID : D020109.2
Start DateStart TimeEnd DateEnd Time
12/16/2001030001/03/20020841
Subject:
TWP/SMET/C2 - RH Sensor bad at Nauru
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
RH sensor bad from 16 Dec 2001 03 GMT to 3 Jan 2002
Measurements:twpsmet60sC2.b1:
  • relh_sd
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)
  • Relative humidity minimum(relh_min)

twpsmet60sC2.a1:
  • relh_sd
  • Relative humidity minimum(relh_min)
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)


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DQRID : D020329.8
Start DateStart TimeEnd DateEnd Time
03/31/2001235904/01/20010020
Subject:
TWP/SMET/C1/C2 - Switch to new Data Header Formats not timely
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
On April 1, 2001 at 00:00:00 new data header with consistent variable naming conventions, 
etc were to be used for all sites, all data streams.  At the TWP sites the time of the 
movement to the new convention did not occur precisely at 00:00:00.  The following data 
files contain between 40 seconds and 20 minutes of data from 4/1/02 in the old format.  The 
delayed format change did not affect data quality in any way.

twpsmet60sC1.a1.20010401.000001.cdf
twpsmet60sC1.b1.20010401.000001.cdf
twpsmet60sC2.a1.20010401.000000.cdf
twpsmet60sC2.b1.20010401.000000.cdf
Measurements:twpsmet60sC2.b1:
  • lo_dir_vec_avg
  • lo_spd_vec_avg
  • up_spd_min
  • up_spd_max
  • Mean Air Temperature or Hardware Error(temp_mean)
  • relh_sd
  • temp_sd
  • internal_voltage
  • Barometric Pressure(atmos_pressure)
  • up_spd_vec_avg
  • Precipitation mean(precip_mean)
  • base_time
  • logger_temp
  • Precipitation maximum(precip_max)
  • lon
  • up_dir_vec_avg
  • precip_sd
  • lo_dir_sd
  • Precipitation minimum(precip_min)
  • vappress_sd
  • Vapor pressure mean(vappress_mean)
  • tbrg_count_total
  • up_spd_arith_avg
  • time_offset
  • lat
  • lo_spd_min
  • tbrg_total
  • lo_spd_max
  • lo_spd_arith_avg
  • up_dir_sd
  • lo_spd_sd
  • alt
  • time
  • Relative humidity mean(relh_mean)
  • up_spd_sd

twpsmet60sC1.b1:
  • up_dir_sd
  • up_spd_max
  • logger_temp
  • time_offset
  • up_spd_min
  • Mean Air Temperature or Hardware Error(temp_mean)
  • lo_spd_sd
  • up_spd_sd
  • tbrg_count_total
  • lon
  • lo_dir_vec_avg
  • Precipitation maximum(precip_max)
  • relh_sd
  • internal_voltage
  • base_time
  • lo_spd_min
  • Relative humidity mean(relh_mean)
  • precip_sd
  • tbrg_total
  • temp_sd
  • Vapor pressure mean(vappress_mean)
  • up_spd_vec_avg
  • up_dir_vec_avg
  • lat
  • lo_spd_max
  • Barometric Pressure(atmos_pressure)
  • up_spd_arith_avg
  • lo_spd_arith_avg
  • lo_spd_vec_avg
  • Precipitation minimum(precip_min)
  • time
  • alt
  • vappress_sd
  • Precipitation mean(precip_mean)
  • lo_dir_sd

twpsmet60sC1.a1:
  • Mean Air Temperature or Hardware Error(temp_mean)
  • lat
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • vappress_sd
  • relh_sd
  • time_offset
  • Vapor pressure mean(vappress_mean)
  • bit_data
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • temp_sd
  • Wind #2 speed maximum(wind2_spd_max)
  • internal_voltage
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • alt
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • external_voltage
  • wind1_spd_sd
  • Wind #1 speed minimum(wind1_spd_min)
  • wind2_dir_sd
  • Temperature maximum(temp_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Barometric Pressure(atmos_pressure)
  • Temperature minimum(temp_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • lon
  • Precipitation maximum(precip_max)
  • Wind #1 speed maximum(wind1_spd_max)
  • Precipitation mean(precip_mean)
  • precip_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation minimum(precip_min)
  • logger_temp
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)
  • wind2_spd_sd
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • base_time
  • Relative humidity minimum(relh_min)
  • wind1_dir_sd

twpsmet60sC2.a1:
  • Precipitation mean(precip_mean)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • wind2_spd_sd
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • temp_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • precip_sd
  • time_offset
  • Temperature maximum(temp_max)
  • internal_voltage
  • Wind #2 speed minimum(wind2_spd_min)
  • Barometric Pressure(atmos_pressure)
  • vappress_sd
  • Relative humidity minimum(relh_min)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • lat
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Precipitation minimum(precip_min)
  • Temperature minimum(temp_min)
  • Wind #2 speed maximum(wind2_spd_max)
  • alt
  • bit_data
  • wind1_spd_sd
  • logger_temp
  • wind1_dir_sd
  • base_time
  • relh_sd
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Relative humidity mean(relh_mean)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Relative humidity maximum(relh_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • lon
  • Precipitation maximum(precip_max)
  • wind2_dir_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed maximum(wind1_spd_max)
  • Vapor pressure mean(vappress_mean)
  • external_voltage


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DQRID : D020613.9
Start DateStart TimeEnd DateEnd Time
10/21/1998031211/19/19982359
Subject:
TWP/C2  Installation
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00
Description:
The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • Wind #1 speed minimum(wind1_spd_min)
  • wind1_dir_sd
  • Vapor pressure mean(vappress_mean)
  • wind1_spd_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • time_offset
  • lat
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • relh_sd
  • temp_sd
  • bit_data
  • Temperature minimum(temp_min)
  • internal_voltage
  • Wind #2 speed minimum(wind2_spd_min)
  • filename
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Barometric Pressure(atmos_pressure)
  • Precipitation mean(precip_mean)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • wind2_dir_sd
  • Relative humidity maximum(relh_max)
  • Relative humidity minimum(relh_min)
  • Temperature maximum(temp_max)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • base_time
  • logger_temp
  • Precipitation maximum(precip_max)
  • lon
  • Wind #2 speed maximum(wind2_spd_max)
  • alt
  • precip_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • external_voltage
  • Precipitation minimum(precip_min)
  • wind2_spd_sd
  • Relative humidity mean(relh_mean)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)

twpsmetC2.00:
  • Raw data stream - documentation not supported

twpsmet60sC2.a1:
  • Precipitation mean(precip_mean)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Precipitation minimum(precip_min)
  • Temperature minimum(temp_min)
  • Wind #2 speed maximum(wind2_spd_max)
  • wind2_spd_sd
  • filename
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • alt
  • bit_data
  • wind1_spd_sd
  • logger_temp
  • wind1_dir_sd
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • base_time
  • temp_sd
  • relh_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Relative humidity mean(relh_mean)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Relative humidity maximum(relh_max)
  • time_offset
  • precip_sd
  • Temperature maximum(temp_max)
  • internal_voltage
  • Wind #2 speed minimum(wind2_spd_min)
  • Barometric Pressure(atmos_pressure)
  • Wind #1 speed minimum(wind1_spd_min)
  • vappress_sd
  • lon
  • Precipitation maximum(precip_max)
  • Relative humidity minimum(relh_min)
  • wind2_dir_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed maximum(wind1_spd_max)
  • Vapor pressure mean(vappress_mean)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • lat
  • external_voltage


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DQRID : D030131.1
Start DateStart TimeEnd DateEnd Time
01/24/2003010001/30/20030500
Subject:
TWP/SMET/C2 - Temperature Sensor Failed, Data Missing
DataStreams:twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
The T/RH sensor on Nauru failed and was replaced (only the temperature sensor failed).
Measurements:twpsmet60sC2.b1:
  • Temperature maximum(temp_max)
  • temp_sd
  • Temperature minimum(temp_min)
  • Mean Air Temperature or Hardware Error(temp_mean)

twpsmet60sC2.a1:
  • Mean Air Temperature or Hardware Error(temp_mean)
  • temp_sd
  • Temperature maximum(temp_max)
  • Temperature minimum(temp_min)


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DQRID : D030501.5
Start DateStart TimeEnd DateEnd Time
04/12/2003100004/24/20030020
Subject:
TWP/SMET/C2 - Upper wind sensor failed
DataStreams:twpsmet60sC2.b1
Description:
The upper wind speed sensor failed.  Wind speeds were reported as 0 m/s and wind direction 
data was not in agreement with the lower wind sensor. Anemometer was replaced.
Measurements:twpsmet60sC2.b1:
  • up_dir_vec_avg
  • up_spd_min
  • up_spd_arith_avg
  • up_dir_sd
  • up_spd_sd
  • up_spd_max
  • up_spd_vec_avg


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DQRID : D040421.1
Start DateStart TimeEnd DateEnd Time
04/10/2004000004/24/20042303
Subject:
TWP/SMET/C2 - Lower wind sensor failure
DataStreams:twpsmet60sC2.b1
Description:
The lower wind sensor failed.  Wind direction showed little or no variation, unlike the 
co-located/upper sensor.  This caused depressed wind speed values as the sensor was not 
rotating properly to orient itself parallel to the wind stream.  The sensor was replaced.
Measurements:twpsmet60sC2.b1:
  • lo_spd_arith_avg
  • lo_spd_min
  • lo_dir_vec_avg
  • lo_spd_vec_avg
  • lo_spd_max
  • lo_spd_sd
  • lo_dir_sd


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DQRID : D040722.7
Start DateStart TimeEnd DateEnd Time
07/07/2004013807/07/20042018
Subject:
TWP/SMET/C2 - connection and timing issues with new logger
DataStreams:twpsmet60sC2.b1
Description:
Atmospheric pressure data are intermittent during this time period due to connection 
problems and program timing issues with new logger installation.  Data resumed normal 
operations after this time period.
Measurements:twpsmet60sC2.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D040726.1
Start DateStart TimeEnd DateEnd Time
10/21/1998031107/06/20040138
Subject:
TWP/SMET/C2 - Negative rainfall rates
DataStreams:twpsmet60sC2.b1
Description:
Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below
0.10 mm/hr should be considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D040824.2
Start DateStart TimeEnd DateEnd Time
07/07/2004013708/17/20042157
Subject:
TWP/SMET/C2 - Incorrect rainrate equation used.
DataStreams:twpsmet60sC2.b1
Description:
There are two different Optical Raingages in use at the TWP sites.  The incorrect equation 
was used at this site.  The incorrect equation is (25*(V^1.87)) - 0.15.
The correct equation is (20*(V^2)) - 0.05.  The correct equation was installed.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D050301.1
Start DateStart TimeEnd DateEnd Time
02/12/2005195503/03/20050430
Subject:
TWP/SMET/C2 - Upper wind direction sensor failure
DataStreams:twpsmet60sC2.b1
Description:
The upper wind direction sensor failed. Wind direction was reported at a near constant 
value of 69 degrees and was significantly different than the lower wind sensor's direction 
values. Sensor replaced.
Measurements:twpsmet60sC2.b1:
  • up_dir_vec_avg
  • up_dir_sd


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DQRID : D050322.2
Start DateStart TimeEnd DateEnd Time
03/09/2005230004/17/20050332
Subject:
TWP/SMET/C2 - Upper wind direction sensor failure
DataStreams:twpsmet60sC2.b1
Description:
After replacement on 03/03/2005 the upper wind direction sensor began reporting erroneous 
values again on 03/09/2005 becoming very apparent after 03/17/2005.  Wind speed data 
appears reasonable but the wind direction data do not agree well with the lower wind sensor.
Measurements:twpsmet60sC2.b1:
  • up_dir_vec_avg
  • up_dir_sd


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DQRID : D050714.1
Start DateStart TimeEnd DateEnd Time
07/10/2005190007/14/20052226
Subject:
TWP/SMET/C2 - RH sensor failure
DataStreams:twpsmet60sC2.b1
Description:
Relative humidity values were frequently over MAX value of 104% starting on 7/10/2005 
through end of period.  Sensor was replaced.
Measurements:twpsmet60sC2.b1:
  • relh_sd
  • Relative humidity mean(relh_mean)


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DQRID : D050920.4
Start DateStart TimeEnd DateEnd Time
09/21/2005162509/21/20051815
Subject:
TWP/SMET/C2 - Instrument maintenance
DataStreams:twpsmet60sC2.b1
Description:
Instrument calibration and testing were taking place for brief periods.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • lo_spd_arith_avg
  • lo_dir_vec_avg
  • lo_spd_vec_avg
  • Vapor pressure mean(vappress_mean)
  • up_spd_min
  • up_dir_sd
  • up_spd_max
  • Mean Air Temperature or Hardware Error(temp_mean)
  • tbrg_count_total
  • Precipitation maximum(precip_max)
  • up_spd_arith_avg
  • lo_spd_sd
  • relh_sd
  • lo_spd_min
  • temp_sd
  • up_dir_vec_avg
  • precip_sd
  • Barometric Pressure(atmos_pressure)
  • lo_dir_sd
  • up_spd_vec_avg
  • Precipitation mean(precip_mean)
  • Precipitation minimum(precip_min)
  • tbrg_total
  • Relative humidity mean(relh_mean)
  • lo_spd_max
  • up_spd_sd


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DQRID : D050921.2
Start DateStart TimeEnd DateEnd Time
09/19/2005080909/19/20051902
Subject:
TWP/SMET/C2 - ORG data incorrect
DataStreams:twpsmet60sC2.b1
Description:
Data from the ORG was incorrect due to heavy condensation on the lens.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D051005.6
Start DateStart TimeEnd DateEnd Time
09/19/2005020009/19/20050330
Subject:
TWP/SMET/C2 - Tower down for calibration activities
DataStreams:twpsmet60sC2.b1
Description:
Tower lowered, wind vanes spun at different frequencies, and ORG tested with electronic 
rain.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • Temperature maximum(temp_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • wind1_dir_sd
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Vapor pressure mean(vappress_mean)
  • wind1_spd_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Precipitation maximum(precip_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • relh_sd
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • temp_sd
  • Temperature minimum(temp_min)
  • precip_sd
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • wind2_spd_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Relative humidity mean(relh_mean)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • wind2_dir_sd
  • Relative humidity maximum(relh_max)
  • Relative humidity minimum(relh_min)


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DQRID : D060614.2
Start DateStart TimeEnd DateEnd Time
06/05/2006214406/15/20060427
Subject:
TWP/SMET/C2 - Temp/RH probe failure
DataStreams:twpsmet60sC2.b1
Description:
Temperature/RH probe failed and was replaced.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • relh_sd
  • temp_sd
  • Vapor pressure mean(vappress_mean)
  • Relative humidity mean(relh_mean)
  • Mean Air Temperature or Hardware Error(temp_mean)


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DQRID : D060818.2
Start DateStart TimeEnd DateEnd Time
10/21/1998000007/06/20042359
Subject:
TWP/SMET/C2 - Reprocess: Barometric pressure units change
DataStreams:twpsmet60sC2.b1
Description:
Barometric pressure data during this time period is reported in hPa.  After this time, the 
data have been converted to kPa to standardize the measurement units among ARM sites and 
to conform to accepted standard units determined by the scientific community.
Measurements:twpsmet60sC2.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D061011.3
Start DateStart TimeEnd DateEnd Time
10/21/1998000011/29/20062014
Subject:
TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added
DataStreams:twpsmet60sC2.b1
Description:
A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. 
Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC2.b1 datastream.  Between 9/26 and 11/29, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros are 
not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19981021-20060926 and data from 
19981021-20061129 will be filled with -9999 (missing).
Measurements:twpsmet60sC2.b1:
  • base_time


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DQRID : D061214.2
Start DateStart TimeEnd DateEnd Time
12/07/2006194101/23/20070023
Subject:
TWP/SMET/C2 - Barometer failure
DataStreams:twpsmet60sC2.b1
Description:
The barometer began experiencing problems with noise resulting in incorrect data.  The 
problem becames worse over time; after 12/19/2006 @0151 GMT the barometer data is completely 
missing.  The barometer was replaced.
Measurements:twpsmet60sC2.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D070510.5
Start DateStart TimeEnd DateEnd Time
04/05/2007000008/19/20072135
Subject:
TWP/SMET/C2 - Lower windspeed sensor questionable
DataStreams:twpsmet60sC2.b1
Description:
Lower wind speed sensor had degraded bearings.  This sensor was reporting as much as 0.4 
m/s lower values than the upper sensors when the winds were 2 m/s or below.  The sensor 
was replaced.
Measurements:twpsmet60sC2.b1:
  • lo_spd_arith_avg
  • lo_spd_min
  • lo_spd_vec_avg
  • lo_spd_max
  • lo_spd_sd


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DQRID : D070520.1
Start DateStart TimeEnd DateEnd Time
05/11/2007000005/22/20070047
Subject:
TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect
DataStreams:twpsmet60sC2.b1
Description:
Wind directions between lower and upper anemometers were displaced by approximately 45 
degrees when a new sensor was installed to replace the failing lower winde sensor.  The new 
sensor direction data incorrect.
Measurements:twpsmet60sC2.b1:
  • lo_dir_vec_avg
  • lo_dir_sd


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DQRID : D071219.1
Start DateStart TimeEnd DateEnd Time
05/22/2007004808/19/20072150
Subject:
TWP/SMET/C2 - Lower Wind Speed Data Suspect
DataStreams:twpsmet60sC2.b1
Description:
The lower wind speed bearings appeared to be binding at speeds below 2 m/s as it did not 
compare well with the upper wind sensor.
Measurements:twpsmet60sC2.b1:
  • lo_spd_arith_avg
  • lo_spd_min
  • lo_spd_vec_avg
  • lo_spd_max
  • lo_spd_sd


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DQRID : D080428.4
Start DateStart TimeEnd DateEnd Time
07/01/2004000006/30/20102359
Subject:
TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values
DataStreams:twpsmet60sC2.b1
Description:
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 will reprocess the data to remove these 
small values.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D080617.1
Start DateStart TimeEnd DateEnd Time
05/08/2008000008/07/20082300
Subject:
TWP/SMET/C2 - ORG rainfall measurements too large
DataStreams:twpsmet60sC2.b1
Description:
The ORG was collecting large amounts of rainfall compared to the co-located tipping bucket 
raingauge.  The cable was chewed by mice causing the wires to make contact 
intermittently mimicking rainfall.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D080922.4
Start DateStart TimeEnd DateEnd Time
06/28/2000110307/06/20000432
Subject:
TWP/SMET/C2 - Missing data
DataStreams:twpsmet60sC2.b1
Description:
Data are missing and unrecoverable.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • lo_spd_arith_avg
  • lo_dir_vec_avg
  • lo_spd_vec_avg
  • Vapor pressure mean(vappress_mean)
  • up_spd_min
  • base_time
  • up_dir_sd
  • up_spd_max
  • logger_temp
  • Mean Air Temperature or Hardware Error(temp_mean)
  • tbrg_count_total
  • Precipitation maximum(precip_max)
  • lon
  • up_spd_arith_avg
  • lo_spd_sd
  • time_offset
  • lat
  • relh_sd
  • lo_spd_min
  • up_dir_vec_avg
  • alt
  • temp_sd
  • internal_voltage
  • precip_sd
  • Barometric Pressure(atmos_pressure)
  • up_spd_vec_avg
  • lo_dir_sd
  • Precipitation mean(precip_mean)
  • Precipitation minimum(precip_min)
  • tbrg_total
  • time
  • Relative humidity mean(relh_mean)
  • lo_spd_max
  • up_spd_sd


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DQRID : D081022.5
Start DateStart TimeEnd DateEnd Time
11/01/1998000002/23/20090410
Subject:
TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage
DataStreams:twpsmet60sC2.b1
Description:
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.
Measurements:twpsmet60sC2.b1:
  • lo_spd_arith_avg
  • lo_spd_min
  • lo_spd_vec_avg
  • up_spd_min
  • up_spd_arith_avg
  • lo_spd_max
  • up_spd_sd
  • up_spd_max
  • lo_spd_sd
  • up_spd_vec_avg


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DQRID : D081027.2
Start DateStart TimeEnd DateEnd Time
10/05/2008231110/05/20082344
Subject:
TWP/SMET/C2 - ORG rainrate high due to calibration.
DataStreams:twpsmet60sC2.b1
Description:
The rainrate from the ORG was high due to calibration.  This data is not real.
Measurements:twpsmet60sC2.b1:
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • precip_sd


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DQRID : D090604.2
Start DateStart TimeEnd DateEnd Time
05/20/2009000406/05/20092359
Subject:
TWP/SMET/C2 - Barometer data incorrect
DataStreams:twpsmet60sC2.b1
Description:
Beginning 05/20, atmos_pressure exceeded MAX between ~21:00 and 01:00 UTC on most days.  
The inlet tube was accidentally pinched in the door of the logger enclosure artificially 
increasing the atmospheric pressure during the listed times.  Only a few hours exceeded 
max limits.
Measurements:twpsmet60sC2.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D090918.1
Start DateStart TimeEnd DateEnd Time
07/01/2009010010/15/20090300
Subject:
TWP/SMET/C2 - Induced wind speed when calm
DataStreams:twpsmet60sC2.b1
Description:
The upper and lower wind sensors were not trending well at wind speed below 1 m/s.  Both 
sensors were showing values above 0m/s when calm.  The lightning protector was at fault 
resulting in an induced wind voltage during calm conditions.

Users should subtract any offset found (for example 0.19 m/s for upper wind speed) when 
the wind speeds are flat-lined.  The offset value was not consistent.
Measurements:twpsmet60sC2.b1:
  • lo_spd_arith_avg
  • lo_spd_min
  • lo_spd_vec_avg
  • up_spd_min
  • up_spd_arith_avg
  • lo_spd_max
  • up_spd_max
  • up_spd_vec_avg


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DQRID : D091030.2
Start DateStart TimeEnd DateEnd Time
10/14/2009215010/15/20090315
Subject:
TWP/SMET/C2 - Tower Lowered for Maintenance
DataStreams:twpsmet60sC2.b1
Description:
Data is suspect due to the tower being lowered.
Measurements:twpsmet60sC2.b1:
  • vappress_sd
  • lo_spd_arith_avg
  • relh_sd
  • lo_spd_min
  • lo_dir_vec_avg
  • temp_sd
  • up_dir_vec_avg
  • lo_spd_vec_avg
  • Vapor pressure mean(vappress_mean)
  • up_spd_min
  • up_dir_sd
  • up_spd_max
  • Mean Air Temperature or Hardware Error(temp_mean)
  • up_spd_vec_avg
  • lo_dir_sd
  • Relative humidity mean(relh_mean)
  • up_spd_arith_avg
  • lo_spd_max
  • up_spd_sd
  • lo_spd_sd


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DQRID : D100303.3
Start DateStart TimeEnd DateEnd Time
02/04/2010060002/23/20102315
Subject:
TWP/SMET/C2 - Barometer failure
DataStreams:twpsmet60sC2.b1
Description:
The atmos_pressure values were spiking high (up to 110 kPa) from 06:00 UTC on 02/04 until 
the data went missing at 10:44 UTC on 02/06 when the barometer failed completely.

Barometer replaced 2/23.
Measurements:twpsmet60sC2.b1:
  • Barometric Pressure(atmos_pressure)


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