DQRID : D140829.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/19/2014172603/31/20142359Suspect
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Subject:
MAO/TRACEGAS/S1 - Instrument problem
DataStreams:maoaosnoxS1.a1
Description:
Photolysis cell efficiency decreased from the beginning of the deployment due to some of 
the LEDs on the converter lamp failing. During February and March, the photolysis cell 
efficiency decreased to approximately 0.2. NO2 Data is provided during this period using the 
compromised lamp and adjusted for lower efficiency.
Suggestions: 
NO2 reported data in the newly recovered period is considerably less accurate than 

expected, (+/-20% is an estimate), but the potential error appears relatively consistent 
over the period.  Because the conversion efficiency is low, the precision is also 
compromised.
Measurements:maoaosnoxS1.a1:
  • no2
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