Title: ACE-Asia Surface: Kosan METRI Skyradiometer data
Summary:
This file is an explanatory note about 'METRI_optical.txt' file.
File format: TXT file
The result express a spectral optical depth, Angstrom exponent, single scattering albedo
from skyradiometer
(Nakajima et al., 1996) 

Data Category: Surface
Network/Source: Kosan, Jeju
Observing Frequency: every about three minutes
Begin Date: 1 March 2001 End Date: 4 May 2001

Region: ACE-Asia
Latitude: 33o 17' N
Longitude: 126o 10' E

P. I.: Byoung-Cheol Choi, Jiyoung Kim 
Questions about the data should be directed to: jykim@metri.re.kr


Each column is as follows.

Column No. Elements Units Comments

1 Year(Integer)

2 Month(Integer)

3 Day(Integer) 

4 Hour(Integer)

5 Minute(Integer)

6 Time(real hour)

7 aerosol optical depth (400nm) [unitless]

8 aerosol optical depth (500nm) [unitless]

9 aerosol optical depth (675nm) [unitless]

10 aerosol optical depth (870nm) [unitless]

11 aerosol optical depth (1020nm) [unitless]

12 Angstrom Exponent [unitless]

13 single scattering albedo (400nm) [unitless]

14 single scattering albedo (500nm) [unitless]

15 single scattering albedo (675nm) [unitless]

16 single scattering albedo (870nm) [unitless]

17 single scattering albedo (1020nm) [unitless]


reference
Nakajima, T., G. Tonna, R. Rao, Y. Kaufman and B. Holben, 1996: Use of sky brightness
measurements from ground for remote sensing of particular polydispersions. App.
Opt., 35, 2672-2686.