Date:  11 Dec 1995________
 Time Sent: 10:00E Summer ________
 Reported by: John Gras_____________
 
 
 
 CHECK IF                      COMMENTS/
 OPERATIONAL                   CUT TIME OFF-LINE
 ------------                  -------------------
 
 
 YES  CN, TSI 3020
 
 YES  Static thermal gradient CCN Counter     
 
 YES  Continuous record of CCN at 0.5%
 
 YES  PMS ASASP-X
 
 YES  TSI 3071
 
 YES   Particle number size distribution using n UDMPS

 YES   TDMA measurements of hygroscopic growth
 
 YES  Light scattering & backscattering fraction, 2 nephelometers
 
 NO   Ammonium to nss sulfate molar ratio using thermal cond. ----->not included
 
 YES  Magee Scientific Aethalometer
 
 YES  TSI 3760 CN counter Gras
 
 YES  Hivol, PM10
 
 YES  Size selected filter stack
 
 NO  SO2 Saltzman
 
 YES   NH3 Whung, AOML
 
 YES  DMS, automated gas chromatography
 
 YES  Radon (222)
 
 YES  Spectral optical depth
 
 YES   Aerosol chemical composition using mass spectrometry
  
 YES   Daily MOUDI samples
 
 YES  Six-stage hi-vol cascade impactor Sievering
 
 YES  Bulk filter concentrations every three hours
 
 YES  NOx, NMHC, O3
 
 YES  Peroxides and aldehydes
 
 YES   Stable sulfur isotopes
 
 YES  Single particle analysis using TEM/SEM/EDXA
 
 YES   Single particle analysis using MassSpec
 
 YES   APS

 YES  ISS -operational
No change in instrument status since last report. Baseline sector winds have continued with CN currently around 1000 /cm3, Rn levels around 50 mBeqm-3 CCN at 0.5% around 80 cm-3. Aerosol size distributions are showing a strong mode around 10 nm diam. and an otherwise very "flat" nature.