Data Quality Reports for Session: 135733 User: vghate Completed: 06/27/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000608.7TWP/C2/SMET Wind SpeedstwpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
D000608.8TWP/C2/SMET Wind SpeedstwpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
D000608.9TWP/C2/SMET Winds SpeedstwpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
D000613.2TWP/C2/SMET Temperature spiketwpsmet60sC2.a1, twpsmet60sC2.b1
D040726.1TWP/SMET/C2 - Negative rainfall ratestwpsmet60sC2.b1
D060818.2TWP/SMET/C2 - Reprocess: Barometric pressure units change twpsmet60sC2.b1
D061011.3TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge addedtwpsmet60sC2.b1
D080922.4TWP/SMET/C2 - Missing datatwpsmet60sC2.b1
D081022.5TWP/SMET/C2 - Wind Speed data contain offset due to induced voltagetwpsmet60sC2.b1


DQRID : D000608.7
Start DateStart TimeEnd DateEnd Time
12/24/1998000001/08/19992100
Subject:
TWP/C2/SMET Wind Speeds
DataStreams:twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
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:twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
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:twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1
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
  • Vapor pressure mean(vappress_mean)
  • Temperature minimum(temp_min)
  • Temperature mean(temp_mean)
twpsmet60sC2.a1:
  • Temperature mean(temp_mean)
  • temp_sd
  • Vapor pressure mean(vappress_mean)
  • Temperature maximum(temp_max)
  • vappress_sd
  • Temperature minimum(temp_min)

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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 mean(precip_mean)
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd

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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:
  • Atmospheric 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 : 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)
  • base_time
  • up_spd_min
  • up_dir_sd
  • up_spd_max
  • logger_temp
  • Temperature mean(temp_mean)
  • tbrg_count_total
  • Precipitation maximum(precip_max)
  • lon
  • up_spd_arith_avg
  • lo_spd_sd
  • lat
  • time_offset
  • relh_sd
  • lo_spd_min
  • up_dir_vec_avg
  • temp_sd
  • alt
  • internal_voltage
  • precip_sd
  • Atmospheric pressure(atmos_pressure)
  • up_spd_vec_avg
  • lo_dir_sd
  • Precipitation minimum(precip_min)
  • Precipitation mean(precip_mean)
  • 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_max
  • up_spd_sd
  • lo_spd_sd
  • up_spd_vec_avg

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