Version 1.0 initial release of data 
Version 2.0 09-May-2002. Changed data processing to use RAF reference altitudes.
                         Eliminated 864nm channel from data set, because of poor tracking performance at times. Individual time segments may still be available
                         upon request.
Version 3.0 06-Sep-2002. Added interpolated AOD and extinction at 550nm to profile data files.
Version 4.0 08-Nov-2002. Changed water vapor spectroscopy to LBLRTM 6.01 (HITRAN 2000, release 11).
                         Released H2O profiles including errorbars and in-situ density.         
                         Applied diffuse light correction.
                         Added error bars to extinction profiles.