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Loading from 2014-04-01 - 2014-05-01
Data taken from DMF, untarred, unzipped and renamed back to orignal file names

It was noted that BOTH TEI 42i's began to lose  their internal Mass Flow Meters.  This was not consequential as the inlet has much better Mass Flow Controllers.  The effect was noted as periodic drop outs and shifts in the internal MFM signals.  The same behavior was noted in TCAP.  It appears related to ingestion of water, though this is by no means definite.

NO2 signal is problematic.  The photolysis cell continued to deteriorate and did not even have 5% efficiency.  As such, no data is reported.  

The standard cylinder expired on 2

Data dropouts -

Power at T3 has been most irregular.  The NOx box in particular is susceptible to interruptions.  After resumption of power, it takes time for the signals to stabilize (the PMT cooler takes some time to reach equilibrium).  As of April, Operators reconfigured the system for UPS protection of instruments.  Pump stoppage was greatly reduced.  Data outages were limited to much shorter periods and the data record is nearly complete.  A log of data dropouts is as follows.  Consult the site log for details.

2014-04-17 06:00 - 2014-05-09 06:00 Calibration cylinder was either turned off or expired.  
2014-04-14 08:00 - 2014-04-14 12:00 Several >100 ppbv spikes presumably due to onsite operation of equipment
2014-04-19 19:00 - 2014-04-19 23:00 Multiple large spikes presumably due to generator since they are bracketed by short pump outages.
2014-04-26 22:05 - 2014-04-26 22:10 Power outage on generator transfer