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Loading from 2014-09-01 - 2014-10-01
Data taken from DMF, untarred, unzipped and renamed back to orignal file names

It was noted that BOTH TEI 42i's lost their internal Mass Flow Meters.  This was not consequential as the inlet has much better Mass Flow Controllers.  

Ambient data appear valid.  

2014-09-14 a 47-mm x 5-um Teflon filter was added upstream of the NO/NOx channel.  There has been issures with the operation of the winch to raise/lower the NOx inlet tower (necessary to change the filter on a 2-week schedule).  Some evidence of reduced sensitivity after ~2014-09-24.  It is not clear if this is due to the filter becoming dirty.  The photolysis conversion efficiency is quite high (0.74) which is good. iAlso on 2014-09-24, the zero air signals on all three channel increased substantially.  

Diurnal cycles of all three species are readily apparent.  Generator operation and restarts seemed quite commone this month.  No discrimination of these periods was provided.