NAMMA LARGE Aerosol Number Density Readme File		last revised on 12-20-06
Langley Aerosol Research Group
Bruce Anderson, Gao Chen, Lee Thornhill, and Eddie Winstead
MS 483, NASA Langley Research Center, Hampton VA
Data Contact Person: Lee Thornhill, k.l.thornhill@larc.nasa.gov

Time resolution = 1 second

Variables:
0.  Time		seconds		UTC seconds (from ICATS feed)	
1.  Latitude		deg 		from ICATS feed
2.  Longitude		deg 		from ICATS feed
3.  Altitude		ft		from ICATS feed
4.  Ambient Temp	deg C		Static Air Temperature (from ICATS feed)
5.  Ambient Pressure	mb		Static Air Pressure (from ICATS feed)
6.  System Temp		deg C   	System Temperature (from TSI Nephelometer)
7.  System Press	mb		System Pressure (from TSI Nephelometer)
8.  System RH		%		System Relative Humidity (from TSI Nephelometer)
9.  Total CNC		#/cm3		Number Concentration from the CNC-3025 
10.  Cold CN		#/cm3		Total CN from the CNC-3010
11. Hot CN		#/cm3		Volatile CN from the CNC-3010
12. Hot/Cold		----		hotCN to coldCN ratios
13. Ultrafine CN	#/cm3		Total_CNC(3025)-cold_CNC(3010)


Data Flags
-999.0 = Data Missing
-888.0 = Data flagged as questionable or below detection limits

Notes
1. All aerosol number densities were corrected to ambient temperature and pressure. 
To obtain values that are representative of sea level conditions, multiply the densities
by (1013/Ambient Pressure)*((ambient temperature+273)/293)
2. The 50% cut-size diameters of the TSI3025 and TSI3010 CN counters are 3 and 10 nm, respectively.
Therefore, the "Ultrafine" CN number densities are representative of the concentration of particles
that are between 3 and 10 nm in size.