Aerosol optical thickness and angstrom exponent by four channel method
Higurashi, A., and T. Nakajima, 2002:
Detection of aerosol types over the East China Sea near Japan from four-channel satellite data. 
Geophys. Res. Lett., 29(17), 1836, doi:10.1029/2002GL015357.

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Note:

Area: -180~180deg E, 90~-90deg N, 0.125 deg grid

4-byte float binary (little endian, 4*2880*1441)

data/orig: Results by original four-channel mothod
data/sz-K: Results using insitu observed size-distribution by Dr. Nobuyuki Kikuchi

alfa.440-870: Aerosol optical thickness @550nm
log.taua550: Angstrom exponent between 440nm and 870nm

Aerosol Optical thickness

April 2003

May 2003

June 2003

July 2003

August 2003

September 2003

October 2003

Angstrom exponent between 440nm and 870nm