Date:  29 Nov 1995________
 Time Sent: 09:50E Summer ________
 Reported by: John Gras_____________
 
 
 
 CHECK IF                      COMMENTS/
 OPERATIONAL                   CUT TIME OFF-LINE
 ------------                  -------------------
 
 
   CN, TSI 3020
 
   Static thermal gradient CCN Counter     
 
   Continuous record of CCN at 0.5%
 
   PMS ASASP-X
 
   TSI 3071
 
    Particle number size distribution using n UDMPS  

    TDMA measurements of hygroscopic growth
 
   Light scattering & backscattering fraction, 2 nephelometers

    Ammonium to nss sulfate molar ratio using thermal cond. ----->not included 

   Magee Scientific Aethalometer
 
   TSI 3760 CN counter Gras
 
   Hivol, PM10
 
   Size selected filter stack
 
   SO2 Saltzman
 
    NH3 Whung, AOML
 
   DMS, automated gas chromatography
 
   Radon (222)
 
   Spectral optical depth
 
    Aerosol chemical composition using mass pectrometry  

    Daily MOUDI samples
 
   Six-stage hi-vol cascade impactor Sievering
 
   Bulk filter concentrations every three hours
 
   NOx, NMHC, O3
 
   Peroxides and aldehydes
 
    Stable sulfur isotopes
 
   Single particle analysis using TEM/SEM/EDXA
 
    Single particle analysis using MassSpec 

    APS

   ISS -operational

Following the weak front yesterday we experienced winds from the baseline 
sector for a relatively short while and are now back in a northerly.  CN 
concentrations are elevated a little, around 850 cm-3, CCN @ 0.5% are 
also up  a little at around 150 cm-3.  Radon is not so high at about 100 
mBeq m-3 although NOX is up.  This suggests that the trajectories at the 
moment have had a relatively short land contact but probably passed over 
a population centre.  CN and UCN have been tracking closely but these 
are also just now showing some ultrafine particles.

The SO2 instrument is still down while the inlet problems are sorted 
out. I have heard no advances on the DRI CCN spectrometer and everything 
else appears to be operating as expected.

John