Date:  24 Nov 1995________
Time Sent: 09:45 E 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 an 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 spectrometry >

   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


A weak front passed here last night and we are now in a W - WSW air 
stream at about 12 m/s.  Radon is low, 28 mBeq /m3 but CN are reasonably 
high, around 900-1000 /cm3.  CCN conc. around 100 /cm3.  There is a 
pronounced 10 nm Diam particle mode at the moment
-  mixing down? 
There are some doubts about the SO2 calibration - Jill is 
checking that today.  

A local fly-by and flight looking at vertical mixing in the Grim area 
sounds good.



John