Data Quality Reports for Session: 183650 User: neheri1 Completed: 02/22/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D060407.1NIM/MET/M1 - Software problemnimmetM1.b1Missing
D060524.2NIM/MET/M1 - ORG failurenimmetM1.b1Incorrect
D080304.3NIM/MET/M1 - ORG underestimated precipitationnimmetM1.b1Suspect
D081022.11NIM/MET/M1 - Wind Speed data contain offset due to induced voltagenimmetM1.b1Suspect
D091217.1NIM/MET/M1 - PWD cumulative precipitation incorrectnimmetM1.b1Incorrect
D091217.2NIM/MET/M1 - PWD 1 minute rainfall data suspectnimmetM1.b1Suspect
D111006.8NIM/MET/M1 - Deployment periodnimmetM1.b1Suspect


DQRID : D060407.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/10/2006160003/01/20060803Missing
Subject:
NIM/MET/M1 - Software problem
DataStreams:nimmetM1.b1
Description:
Intermittent Failure of Logger to read data from the Barometer.
Measurements:nimmetM1.b1:
  • Atmospheric pressure(atmos_pressure)


Back To Table of Contents

DQRID : D060524.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/13/2006000005/26/20061015Incorrect
Subject:
NIM/MET/M1  - ORG failure
DataStreams:nimmetM1.b1
Description:
The optical rain gauge on the met system did not record precipitation during this time 
period.
Measurements:nimmetM1.b1:
  • ORG precipitation rate mean(org_precip_rate_mean)


Back To Table of Contents

DQRID : D080304.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/06/2006000001/06/20072359Suspect
Subject:
NIM/MET/M1 - ORG underestimated precipitation
DataStreams:nimmetM1.b1
Description:
The ORG underestimated precipitation by about 38% during the entire NIM deployment.  No 
troubleshooting technique or replacement of gauge was successful in correcting the problem.
Measurements:nimmetM1.b1:
  • ORG precipitation rate mean(org_precip_rate_mean)


Back To Table of Contents

DQRID : D081022.11
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/06/2006000001/07/20072359Suspect
Subject:
NIM/MET/M1 - Wind Speed data contain offset due to induced voltage
DataStreams:nimmetM1.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:nimmetM1.b1:
  • Wind speed vector mean(wspd_vec_mean)
  • Wind speed, lower, 1-min avg(wspd_arith_mean)


Back To Table of Contents

DQRID : D091217.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/31/2006000007/31/20062359Incorrect
Subject:
NIM/MET/M1 - PWD cumulative precipitation incorrect
DataStreams:nimmetM1.b1
Description:
The Present Weather Detector is a serial sensor.  The MET system datalogger reads in the 
data from this sensor.  During the time in question serial comms problems were causing the 
data from the sensor to be read incorrectly.  The data for one variable showed up in 
data for another variable or not at all.  We reprocessed the data to correct as much of this 
error as we could.  The cumulative rainfall variable was calculated from the 
instantaneous rainfall variable during reprocessing.  Since we cannot be entirely sure all 
cumulative rainfall values are correct or were completely captured the cumulative rainfall data is 
considered to be unreliable.  This issue shows up when comparing the cumulative rainfall 
data at the end of the day 07/31/2006 (79.08) and the beginning of the next day 
08/01/2006 (3.17).  Clearly we were either under or over-estimating the cumulative rainfall.
Measurements:nimmetM1.b1:
  • pwd_cumul_rain


Back To Table of Contents

DQRID : D091217.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/31/2006000007/31/20062359Suspect
Subject:
NIM/MET/M1 - PWD 1 minute rainfall data suspect
DataStreams:nimmetM1.b1
Description:
The Present Weather Detector is a serial sensor.  The MET system datalogger reads in the 
data from this sensor.  During the time in question serial comms problems were causing the 
data from the sensor to be read incorrectly.  The data for one variable showed up in 
data for another variable or not at all.  We reprocessed the data to correct as much of this 
error as we could. We cannot be entirely certain that all rainfall values are correct or 
were captured properly.  It is possible that some values were missed completely.
Measurements:nimmetM1.b1:
  • PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)


Back To Table of Contents

DQRID : D111006.8
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/20/2005000001/05/20062359Suspect
Subject:
NIM/MET/M1 - Deployment period
DataStreams:nimmetM1.b1
Description:
All data from the met tower are suspect during this time period as the systems were being 
deployed and in various states of operation.
Measurements:nimmetM1.b1:
  • ORG precipitation rate mean(org_precip_rate_mean)
  • time
  • Humidity, relative, at 2-m height, 1-min avg(rh_mean)
  • logger_temp
  • PWD 10 minute mean visibility(pwd_mean_vis_10min)
  • PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
  • Temperature mean(temp_mean)
  • pwd_err_code
  • Atmospheric pressure(atmos_pressure)
  • pwd_cumul_rain
  • Wind direction vector mean(wdir_vec_mean)
  • Vapor pressure mean, calculated(vapor_pressure_mean)
  • vapor_pressure_std
  • rh_std
  • PWD 1 minute mean visibility(pwd_mean_vis_1min)
  • temp_std
  • Wind speed, lower, 1-min avg(wspd_arith_mean)
  • Altitude above mean sea level(alt)
  • time_offset
  • pwd_pw_code_inst
  • logger_volt
  • North latitude(lat)
  • East longitude(lon)
  • base_time
  • pwd_pw_code_1hr
  • pwd_pw_code_15min
  • Wind speed vector mean(wspd_vec_mean)
  • wdir_vec_std


Back To Table of Contents



END OF DATA