Data Quality Reports for Session: 118245 User: m_c_cribb Completed: 03/17/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D090211.7HFE/AOS/M1 - PSAP data missinghfeaosM1.a1
D090216.3HFE/MET/M1 - Intermittent barometer failurehfemetM1.b1
D090216.4HFE/MET/M1 - Intermittent PWD datahfemetM1.b1
D090220.3HFE/MET/M1 - Induced voltage on wind speed sensor cablehfemetM1.b1


DQRID : D090211.7
Start DateStart TimeEnd DateEnd Time
08/23/2008015512/28/20082300
Subject:
HFE/AOS/M1 - PSAP data missing
DataStreams:hfeaosM1.a1
Description:
The PSAP was disconnected during this time period.
Measurements:hfeaosM1.a1:
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_R_Dry_1um_PSAP3W_1)
  • Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
  • Aerosol light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)

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DQRID : D090216.3
Start DateStart TimeEnd DateEnd Time
05/19/2008000012/28/20082159
Subject:
HFE/MET/M1 - Intermittent barometer failure
DataStreams:hfemetM1.b1
Description:
Intermittent barometer failure occurred throughout the deployment.  We were unable to 
pinpoint the cause of the failure.  Typically one or two minutes of missing data occurred 
every few days.

Since pressure data is typically invariant over 1 minute, linear interpolation should be 
fine to fill in missing data.
Measurements:hfemetM1.b1:
  • Barometric Pressure(atmos_pressure)

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DQRID : D090216.4
Start DateStart TimeEnd DateEnd Time
05/19/2008000012/28/20082159
Subject:
HFE/MET/M1 - Intermittent PWD data
DataStreams:hfemetM1.b1
Description:
The Present Weather Detector had intermittent missing values throughout this deployment.  
Missing values occurred almost everyday, usually just one or two minutes per day.
Measurements:hfemetM1.b1:
  • 1 minute average water intensity(pwd_avg_H2O_int_1_min)
  • 15 min present weather code(pwd_pw_code_15_min)
  • Average 10 min visibility(pwd_avg_vis_10_min)
  • Average 1 min visibility(pwd_avg_vis_1_min)
  • 1 hour present weather code(pwd_pw_code_1_hr)
  • Instantaneous present weather code(pwd_pw_code_inst)
  • Cumulative water(pwd_cumul_water)
  • Present weather detector error code(pwd_err_code)
  • Present weather detector ID(pwd_id)
  • Cumulative snow(pwd_cumul_snow)

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DQRID : D090220.3
Start DateStart TimeEnd DateEnd Time
05/19/2008000012/28/20082359
Subject:
HFE/MET/M1 - Induced voltage on wind speed sensor cable
DataStreams:hfemetM1.b1
Description:
The cable for the wind monitor is not a twisted pair shielded cable.  This caused an 
induced voltage on the wind sensor wires from the wind direction measurement excitation 
voltage.  A small offset is added into the wind speeds.  This value varies.  Most frequently 
the values of 0.49, 0.588 and 0.686 m/s were added into the wind speed.  On 11/27/2008 the 
value jumped to 0.98 m/s for most of the day.
Measurements:hfemetM1.b1:
  • Wind speed arithmetic average(wind_spd_arith_avg)
  • Wind speed arithmetic maximum(wind_spd_arith_max)
  • Wind speed arithmetic minimum(wind_spd_arith_min)
  • Vector-averaged Wind Speed(wind_spd_vec_avg)
  • Wind speed arithmetic standard deviation(wind_spd_arith_sd)

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