DQRID : D150928.6
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/15/2015205709/19/20151408Suspect
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Subject:
MAO/SMPS/S1 - Insects clogged nafion dryer and SMPS impactor
DataStreams:maoaossmpsS1.a1
Description:
During this time period the SMPS total concentration was low relative to the cpcf and cpcu 
concentrations.  Upon troubleshooting and examination of components it was discovered 
that a number of small insects had clogged the nafion dryer and SMPS impactor.  The counts 
may have been lowered due to additional losses from bugs.
Suggestions: 
The concentrations are lower, but seem to trace diurnal patterns in total number 

concentrations. It is unclear what size dependent counting efficiency could have resulted 
from this. Use data with caution
Measurements:maoaossmpsS1.a1:
  • total_concentration
  • sample_pressure
  • number_size_distribution
  • CPC_sample_flow
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