Data Quality Reports for Session: 182384 User: scollis Completed: 12/15/2016

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D080305.2SGP/DISDROMETER/C1 - Reprocessing Notice (RID 492)sgpdisdrometerC1.b1Does not affect quality
D120113.4SGP/DISDROMETER/C1 - Reprocess: Incorrect datestampsgpdisdrometerC1.b1Does not affect quality
D120917.2SGP/DISDROMETER/C1 - Precipitation events not recordedsgpdisdrometerC1.b1Incorrect
D120917.3SGP/DISDROMETER/C1 - Missing datasgpdisdrometerC1.b1Missing
D130227.3TWP/DISDROMETER/C3 - Debris in conetwpdisdrometerC3.b1Incorrect
D130508.3TWP/DISDROMETER/C3 - Precipitation not recordedtwpdisdrometerC3.b1Incorrect
D131209.1SGP/DISDROMETER/C1 - Instrument failuresgpdisdrometerC1.b1Incorrect
D140204.3SGP/DISDROMETER/C1 - Missing datasgpdisdrometerC1.b1Missing
D140801.1SGP/DISDROMETER/C1 - Data collections issues resulted in loss of datasgpdisdrometerC1.b1Missing
D140806.2SGP/DISDROMETER/C1 - Reprocessing Notice (RID 1211)sgpdisdrometerC1.b1Does not affect quality
D140909.2SGP/DISDROMETER/C1 - Data collections issue resulted in incorrect datasgpdisdrometerC1.b1Incorrect
D150716.1SGP/DISDROMETER/C1 - Communication failuresgpdisdrometerC1.b1Incorrect
D160104.7SGP Site Power Outage Due to Winter StormsgpdisdrometerC1.b1Does not affect quality
D160212.3SGP - Data System Upgrades: Data MissingsgpdisdrometerC1.b1Missing
D160418.1SGP/DISDROMETER/C1 - Incorrect zero values reportedsgpdisdrometerC1.b1Incorrect


DQRID : D080305.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/23/2007000001/17/20081946Does not affect quality
Subject:
SGP/DISDROMETER/C1 - Reprocessing Notice (RID 492)
DataStreams:sgpdisdrometerC1.b1
Description:
See below for details of reprocessing that was completed on 20141211.  Original DQR 
category: 5 (Transparent - Does not affect quality).

-----------------------------------------------------------

No Data were collected on 12/23, 2007. When data collection resumed on 12/24 at 17:00 the 
sampling interval was inadvertently changed from 1 minute to 30 seconds.  The sampling 
interval was corrected on 1/17/2008 at 20:00.

Users need to be aware of the change and they should recalculate using the formulas in the 
Instrument Handbook if a one minute frequency is needed.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • time
  • num_drop
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D120113.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/21/2011000011/21/20112359Does not affect quality
Subject:
SGP/DISDROMETER/C1 - Reprocess: Incorrect datestamp
DataStreams:sgpdisdrometerC1.b1
Description:
The datestamp was off by one day for a several day period. Precipitation was only reported 
for one day during this time period.  The data for 20111121 should be reported as 
20111122.
Measurements:sgpdisdrometerC1.b1:
  • ef
  • mean_diam_drop_class
  • lambda
  • delta_diam
  • base_time
  • liq_water
  • fall_vel
  • time
  • num_drop
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • d_max
  • time_offset
  • nd
  • Rainfall rate(rain_rate)
  • Radar reflectivity(Z)
  • Altitude above mean sea level(alt)
  • n_0

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DQRID : D120917.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/12/2012000007/24/20122359Incorrect
Subject:
SGP/DISDROMETER/C1 - Precipitation events not recorded
DataStreams:sgpdisdrometerC1.b1
Description:
The instrument was not recording precipitation events seen by other co-located 
instruments.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • mean_diam_drop_class
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • delta_diam
  • liq_water
  • num_drop
  • fall_velocity
  • energy_flux

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DQRID : D120917.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/25/2012000010/12/20121800Missing
Subject:
SGP/DISDROMETER/C1 - Missing data
DataStreams:sgpdisdrometerC1.b1
Description:
Data are missing and unrecoverable.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • time
  • num_drop
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D130227.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/23/2012000002/01/20130000Incorrect
Subject:
TWP/DISDROMETER/C3 - Debris in cone
DataStreams:twpdisdrometerC3.b1
Description:
The instrument sensor failed due to debris in cone.  Clogs cleared 2/1.
Measurements:twpdisdrometerC3.b1:
  • num_drop
  • distribution_slope
  • distribution_intercept
  • number_density
  • mean_diam_drop_class
  • Precipitation(precip_dis)
  • fall_velocity
  • Rainfall rate(rain_rate)
  • energy_flux
  • radar_reflectivity
  • delta_diam
  • liq_water
  • diam_max
  • drop_class

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DQRID : D130508.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/10/2013060003/18/20132359Incorrect
Subject:
TWP/DISDROMETER/C3 - Precipitation not recorded
DataStreams:twpdisdrometerC3.b1
Description:
Instrument stopped recording precipitation during precipitation event on 3/10. No 
precipitation was recorded during rainfall in the days following this failure. Observations 
resumed on 03/18/2013.
Measurements:twpdisdrometerC3.b1:
  • num_drop
  • distribution_slope
  • energy_flux
  • radar_reflectivity
  • distribution_intercept
  • number_density
  • diam_max
  • liq_water
  • mean_diam_drop_class
  • drop_class
  • Precipitation(precip_dis)
  • fall_velocity
  • Rainfall rate(rain_rate)

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DQRID : D131209.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/21/2013000008/14/20131245Incorrect
Subject:
SGP/DISDROMETER/C1 - Instrument failure
DataStreams:sgpdisdrometerC1.b1
Description:
Initially, the instrument was not recording precipitation.  Then in August it was 
reporting precip rates more than 2x the values reported by other instruments.  Disdrometer data 
for this period are incorrect.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • mean_diam_drop_class
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • delta_diam
  • liq_water
  • num_drop
  • fall_velocity
  • energy_flux

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DQRID : D140204.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/14/2013124611/15/20132108Missing
Subject:
SGP/DISDROMETER/C1 - Missing data
DataStreams:sgpdisdrometerC1.b1
Description:
Data are missing and unrecoverable.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • time
  • num_drop
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D140801.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/09/2014205806/10/20141236Missing
06/20/2014145106/23/20141136Missing
06/07/2014022806/09/20141229Missing
06/24/2014174506/24/20142219Missing
Subject:
SGP/DISDROMETER/C1 - Data collections issues resulted in loss of data
DataStreams:sgpdisdrometerC1.b1
Description:
Data collections terminated for unknown reason.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • time
  • num_drop
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D140806.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/05/2013143705/15/20141820Does not affect quality
Subject:
SGP/DISDROMETER/C1 - Reprocessing Notice (RID 1211)
DataStreams:sgpdisdrometerC1.b1
Description:
See below for details of reprocessing that was completed on 20141217.  Original DQR 
category: 5 (Transparent - Does not affect quality).

-----------------------------------------------------------

The sampling during this period was 30 seconds and not 1 minute.  The data are correct but 
data users need to be aware of this temporal resolution inconsistency.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • mean_diam_drop_class
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • delta_diam
  • liq_water
  • num_drop
  • fall_velocity
  • energy_flux

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DQRID : D140909.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/28/2014000007/08/20141500Incorrect
Subject:
SGP/DISDROMETER/C1 - Data collections issue resulted in incorrect data
DataStreams:sgpdisdrometerC1.b1
Description:
Connections issue resulted in incorrect data.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • mean_diam_drop_class
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • delta_diam
  • liq_water
  • num_drop
  • fall_velocity
  • energy_flux

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DQRID : D150716.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/09/2015000007/08/20151800Incorrect
Subject:
SGP/DISDROMETER/C1 - Communication failure
DataStreams:sgpdisdrometerC1.b1
Description:
A communication failure halted data collection over this period of time.  The problem was 
resolved on July 8, 2015 but the proper functioning of the device was not confirmed until 
the rain event of July 16, 2015.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • mean_diam_drop_class
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • delta_diam
  • liq_water
  • num_drop
  • fall_velocity
  • energy_flux

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DQRID : D160104.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/26/2015000001/01/20162359Does not affect quality
Subject:
SGP Site Power Outage Due to Winter Storm
DataStreams:sgpdisdrometerC1.b1
Description:
On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • num_drop
  • time
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D160212.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/26/2016180001/27/20162145Missing
Subject:
SGP - Data System Upgrades: Data Missing
DataStreams:sgpdisdrometerC1.b1
Description:
The data system was undergoing upgrades.  Data were lost during this period.
Measurements:sgpdisdrometerC1.b1:
  • drop_class
  • qc_num_drop
  • radar_reflectivity
  • distribution_intercept
  • distribution_slope
  • mean_diam_drop_class
  • diam_max
  • delta_diam
  • base_time
  • liq_water
  • qc_rain_rate
  • time
  • num_drop
  • fall_velocity
  • North latitude(lat)
  • East longitude(lon)
  • Precipitation(precip_dis)
  • qc_precip_dis
  • time_offset
  • Rainfall rate(rain_rate)
  • number_density
  • qc_time
  • Altitude above mean sea level(alt)
  • energy_flux

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DQRID : D160418.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/26/2016000004/28/20161515Incorrect
Subject:
SGP/DISDROMETER/C1 - Incorrect zero values reported
DataStreams:sgpdisdrometerC1.b1
Description:
The instrument reports all zeros for the last 2/3 of each hour.
Measurements:sgpdisdrometerC1.b1:
  • radar_reflectivity
  • Precipitation(precip_dis)
  • distribution_slope
  • distribution_intercept
  • Rainfall rate(rain_rate)
  • diam_max
  • number_density
  • liq_water
  • num_drop
  • energy_flux

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