This README file describes the format of the 14-channel Ames Airborne Tracking 
Sunphotometer (AATS-14) preliminary results obtained during ACE-2 aboard the
PELICAN airplane.

The files have the names Rddmmmyy.yyy.asc (entire flight), and for selected
cases there are aerosol extinction profiles (Rddmmmyy.yyy.ext_prof.asc),
and water vapor density profiles (Rddmmmyy.yyy.h2o_prof.asc). The exact format
is described in the header of each file. 

See file revision.txt for important details.

Check out our Web site http://geo.arc.nasa.gov/sgg/ACE-2 for display of results 

The retrieval algorithms are described in:

Russell, P. B., J. M. Livingston, E. G. Dutton, R. F. Puschel, J. A. Reagan,
T. E. Defoor, M. A. Box, D. Allen, P. Pilewski, B. M. Herman, S. A. Kinne, and 
D. J. Hofmann, 1993: "Pinatubo and Pre-Pinatubo Optical-Depth Spectra: Mauna Loa
Measurements, Comparisons, Inferred Particle Size Distributions, Radiative Effects,
and Relationsship to Lidar Data". Journal of Geophysical Research, Vol. 98, No. D12,
22'969-22'985.

Schmid B. and Ch. Wehrli, 1995: Comparison of Sun Photometer Calibration by Langley
Technique and Standard Lamp. Appl. Opt., Vol. 34, No. 21, 4500-4512.

Schmid B., K. J. Thome, P. Demoulin, R. Peter, C. Mätzler, and J. Sekler, 1996:
Comparison of Modeled and Empirical Approaches for Retrieving Columnar Water Vapor
from Solar Transmittance Measurements in the 0.94-µm Region. Journal of Geophysical
Research, Vol. 101, No. D5, 9345-9358.

Schmid B., C. Mätzler, A. Heimo, and N. Kämpfer, 1997: Retrieval of Optical Depth
and Size Distribution of Tropospheric and Stratospheric Aerosols by Means of Sun 
Photometry. IEEE Transactions on Geoscience and Remote Sensing, Vol 35, No. 1, 172-182.

Point of contact:

Beat Schmid/Phil Russell/John Livingston
NASA Ames Research Center
MS 245-5
Moffett Field, CA 94035-1000

Phone: +1 650 604 5933
Fax:   +1 650 604 3625
e-mail: bschmid@mail.arc.nasa.gov
http://geo.arc.nasa.gov/sgg/ACE-2