Data Quality Report for Order ID: 186176
User ID: levine1    Date completed: 2017-06-15
All DQRs
DQR ID Subject Affected Data Streams Data Quality Metric
D141211.1 SGP/CCN/C1 - Incorrect temperature gains or settings sgpaosccnavgC1.c1 Incorrect
D141017.5 SGP/CCN/C1 - Incorrect supersaturation stepping method sgpaosccnavgC1.c2 Incorrect
D150413.1 SGP/CCN/C1 - Removed for calibration sgpaosccnavgC1.c2 Missing
D140205.4 SGP/CCN/C1 - CCN shutdown for repair sgpaosccnavgC1.c2 Missing
D140929.3 SGP/CCN/C1 - Frequent power and communication loss problems sgpaosccnC1.a1 Does not affect quality
D140929.5 SGP/CCN/C1 - CCN presure sensor failure sgpaosccnavgC1.c2 Incorrect
D150306.2 SGP/CCN/C1 - Instrument under counting at lowest super saturation value sgpaosccnavgC1.c1 Suspect
D141208.1 SGP/CCN/C1 - CCN signal is low from possible leak and decline in laser power sgpaosccnC1.a1 Suspect
 
DQR ID: D141211.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2007-05-22 22:00:00 2007-10-23 15:15:00 Incorrect
Subject: SGP/CCN/C1 - Incorrect temperature gains or settings
Affected Datastreams: sgpaosccnavgC1.c1
Description New software was installed with instrument and temperature gains didn't transfer correctly. Super saturation values are incorrect and instrument tended to overheat in an attempt to reach set point values.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • N_CCN (Cloud condensation nuclei number density)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • N_CPC (Condensation particle concentration number)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D141017.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2012-11-30 00:00:00 2013-06-11 23:59:00 Incorrect
Subject: SGP/CCN/C1 - Incorrect supersaturation stepping method
Affected Datastreams: sgpaosccnavgC1.c2
Description The supersaturation stepping method over this period is not consistent with the ccnavg VAP expectations. Therefore, the averaging of the fields done by the CCNAVG VAP are incorrect - the output of the CCNAVG VAP for all fields is bad over this entire period.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • N_CCN (Cloud condensation nuclei number density)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • N_CPC (Condensation particle concentration number)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D150413.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2014-11-11 07:00:00 2015-03-15 20:45:00 Missing
Subject: SGP/CCN/C1 - Removed for calibration
Affected Datastreams: sgpaosccnavgC1.c2
Description Instrument was removed for calibration and scanning evaluation.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • lon (East longitude)
  • N_CCN (Cloud condensation nuclei number density)
  • N_CPC (Condensation particle concentration number)
  • time (Time offset from midnight)
  • base_time (Base time in Epoch)
  • alt (Altitude above mean sea level)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • time_offset (Time offset from base_time)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • lat (North latitude)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D140205.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2013-10-04 15:30:00 2013-10-19 01:00:00 Missing
Subject: SGP/CCN/C1 - CCN shutdown for repair
Affected Datastreams: sgpaosccnavgC1.c2
Description A thermal electric cooler (TEC) was found to be not working. The instrument was shutdown until the TEC could be replaced.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • lon (East longitude)
  • N_CCN (Cloud condensation nuclei number density)
  • N_CPC (Condensation particle concentration number)
  • time (Time offset from midnight)
  • base_time (Base time in Epoch)
  • alt (Altitude above mean sea level)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • time_offset (Time offset from base_time)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • lat (North latitude)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D140929.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2014-06-12 06:14:00 2014-07-15 22:50:00 Does not affect quality
Subject: SGP/CCN/C1 - Frequent power and communication loss problems
Affected Datastreams: sgpaosccnC1.a1
Description There were frequent power and communication losses over the time period. The problem was resolved after power was redistributed and all data acquisition components were replaced.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • N_CPC (Condensation particle concentration number)
  • lon (East longitude)
  • N_CCN (Cloud condensation nuclei number density)
  • time (Time offset from midnight)
  • base_time (Base time in Epoch)
  • alt (Altitude above mean sea level)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • time_offset (Time offset from base_time)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • lat (North latitude)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D140929.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2014-07-15 22:50:00 2014-08-12 14:00:00 Incorrect
Subject: SGP/CCN/C1 - CCN presure sensor failure
Affected Datastreams: sgpaosccnavgC1.c2
Description Sheath flow reading declined and couldn't be adjusted. Unit was shipped back to mentor for repair and calibration.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • N_CCN (Cloud condensation nuclei number density)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • N_CPC (Condensation particle concentration number)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)
 
DQR ID: D150306.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2013-06-11 19:26:00 2015-04-08 17:30:00 Suspect
Subject: SGP/CCN/C1 - Instrument under counting at lowest super saturation value
Affected Datastreams: sgpaosccnavgC1.c1
Description The slow temperature decay of the OPC induced droplet evaporation and caused an under counting of the droplets at the lowest %ss, 0.15.
Measurements
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • supersaturation_setpoint (Sample saturation setpoint)
 
DQR ID: D141208.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2009-05-15 16:00:00 2009-08-03 00:00:00 Suspect
Subject: SGP/CCN/C1 - CCN signal is low from possible leak and decline in laser power
Affected Datastreams: sgpaosccnC1.a1
Description CCN was returned with new laser. Signal was unusually low and flow calibration had changed substantially. A leak is suspect as well as declining laser power as new laser was defective.
Measurements
  • droplet_size (Upper limit of each CCN bin)
  • supersaturation_setpoint (Sample saturation setpoint)
  • N_CCN (Cloud condensation nuclei number density)
  • column_temperature_gradient_measured (Measured temperature difference between top and bottom of column)
  • supersaturation_calculated (Sample supersaturation calculated by model)
  • N_CPC (Condensation particle concentration number)
  • N_CPC_std (Standard deviation of Condensation Particle Concentration Number)
  • N_CCN_dN (Size distribution of activated nuclei)
  • column_temperature_gradient_setting (Gradient between column top and bottom temperature settings)
  • N_CCN_std (Standard deviation of number concentration of CCN)
  • column_temperature_gradient_measured_std (Standard deviation of measured temperature difference between top and bottom of column)