GRIP Aerosol Optical Parameter Files 	
Version R4
Langley Aerosol Research Group
Bruce Anderson, Gao Chen, Lee Thornhill, Andreas Beyersdorf, Luke Ziemba and Eddie Winstead
MS 483, NASA Langley Research Center, Hampton VA
Data Contact Person: Lee Thornhill, kenneth.l.thornhill@nasa.gov

Time resolution = 30 seconds

Last Revision = September 2010

Variables:
   Time			seconds		UTC seconds (from REVEAL feed)	
   Day of Year	 			from REVEAL feed
   Altitude		ft		from REVEAL feed
   Ambient Pressure	mb		Static Air Pressure (from REVEAL feed)
   Ambient Temp		K		Static Air Temperature (from REVEAL feed)
   Tot450_scat		Mm-1		Total Aerosol Scattering Coefficient at 450nm from the TSI Nephelometer
   Tot550_scat		Mm-1		Total Aerosol Scattering Coefficient at 550nm from the TSI Nephelometer
   Tot700_scat		Mm-1		Total Aerosol Scattering Coefficient at 700nm from the TSI Nephelometer
   Sub550_scat		Mm-1		Submicron Scattering Coefficient at 535 nm from the Radiance Research Nephelometer
   Tot470_abs		Mm-1		3-WL Total Aerosol Absorption Coefficient at 470nm (corrected to ambient conditions)
   Tot532_abs		Mm-1		3-WL Total Aerosol Absorption Coefficient at 532nm (corrected to ambient conditions)
   Tot660_abs		Mm-1		3-WL Total Aerosol Absorption Coefficient at 660nm (corrected to ambient conditions)
   Sub470_abs		Mm-1		3-WL Submicron Aerosol Absorption Coefficient at 470nm (corrected to ambient conditions)
   Sub532_abs		Mm-1		3-WL Submicron Aerosol Absorption Coefficient at 532nm (corrected to ambient conditions)
   Sub660_abs		Mm-1		3-WL Submicron Aerosol Absorption Coefficient at 660nm (corrected to ambient conditions)


Data Flags
-999 = Data Missing

Notes:	
1. The TSI nephelometer data were corrected for truncation errors using the procedure described by Anderson and Ogren
Aerosol Science and Technology, 29, 57-69, 1998.
2. The three-wavelength Particle Soot Absorption Photometer data were corrected for a variety of errors using procedures described 
by Virkkula et al., Aerosol Science and Technology, 39, 68-83, 2005.
3. All absorption and scattering coefficients are corrected to represent values found at ambient air temperatures and pressures