Data Quality Reports for Session: 106493 User: gaustad Completed: 07/11/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040722.6TWP/SMET/C2 - All data missing due to logger changetwpsmet60sC2.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 - Instrument failuretwpsmet60sC2.b1
D050322.2TWP/SMET/C2 - Upper wind sensor failuretwpsmet60sC2.b1
D060818.2TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPatwpsmet60sC2.b1
D061011.3TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge addedtwpsmet60sC2.b1


DQRID : D040722.6
Start DateStart TimeEnd DateEnd Time
07/06/2004200307/07/20040137
Subject:
TWP/SMET/C2 - All data missing due to logger change
DataStreams:twpsmet60sC2.b1
Description:
All data are missing at this site during this time period due to collection system, logger 
and enclosure change.  Data resumed after change.
Measurements:twpsmet60sC2.b1:
  • Relative humidity mean(relh_mean)
  • Wind #1 direction standard deviation(wind1_dir_sd)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #1 speed standard deviation(wind1_spd_sd)
  • Time offset from base_time(base_time)
  • Max Temperature at lowest Model Level- 1 hr(temp_max)
  • east longitude for all the input platforms.(lon)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Internal Logger Temperature(logger_temp)
  • Bit data. See details.(bit_data)
  • Time offset of tweaks from base_time(time_offset)
  • Wind #2 direction standard deviation(wind2_dir_sd)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • precipitation minimum(precip_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • Vapor pressure mean(vappress_mean)
  • Internal voltage(internal_voltage)
  • Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • GPS raw data filename(filename)
  • Temperature standard deviation(temp_sd)
  • Min Temperature at lowest Model Level- 1 hr(temp_min)
  • Atmospheric pressure(atmos_pressure)
  • altitude above sea levelaltunits(alt)
  • Relative humidity minimum(relh_min)
  • Wind #2 speed standard deviation(wind2_spd_sd)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Vapor pressure standard deviation(vappress_sd)
  • north latitude for all the input platforms.(lat)
  • Relative humidity maximum(relh_max)
  • Precipitation maximum(precip_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • External voltage(external_voltage)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation mean(precip_mean)
  • Precipitation standard deviation(precip_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:
  • Atmospheric 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 maximum(precip_max)
  • Precipitation mean(precip_mean)
  • precipitation minimum(precip_min)
  • Precipitation standard deviation(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 maximum(precip_max)
  • Precipitation mean(precip_mean)
  • precipitation minimum(precip_min)
  • Precipitation standard deviation(precip_sd)


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DQRID : D050301.1
Start DateStart TimeEnd DateEnd Time
02/12/2005195503/03/20050430
Subject:
TWP/SMET/C2 - Instrument failure
DataStreams:twpsmet60sC2.b1
Description:
Upper wind 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:
  • Wind #1 direction standard deviation(wind1_dir_sd)
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D050322.2
Start DateStart TimeEnd DateEnd Time
03/09/2005230004/17/20050332
Subject:
TWP/SMET/C2 - Upper wind sensor failure
DataStreams:twpsmet60sC2.b1
Description:
After replacement on 03/03/2005 the upper wind 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:
  • Wind #1 direction standard deviation(wind1_dir_sd)
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D060818.2
Start DateStart TimeEnd DateEnd Time
10/21/1998000007/13/20062232
Subject:
TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa
DataStreams:twpsmet60sC2.b1
Description:
Barometric pressure data was converted from hPa to kPa in order 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:
  • Time offset from base_time(base_time)


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