The l2gen comparisons were done in three parts using SeaWiFS high-resolution (1km) 
scenes of the Northeast US from Sept 1997 - Jan 1999:  

1) Four months of data were processed using the jun_21_99 test version of 
l2gen and two methods (the STANDARD and 68NIR, a.k.a. Siegal) to create
monthly composite images (January has 28 scenes; April, 42; and July, 22 are 
shown here). 
Click here for monthly composite results.

2) Seven problem scenes were processed using the aug_31_99 version
of l2gen by three methods (STANDARD, 68NIR, and STUMPF-ARNONE, with 412 
iteration). 
Click here for problem scene results.

3) Nineteen typical scenes were processed using the aug_31_99 version
of l2gen by three methods (STANDARD, 68NIR, and 78NIR, a.k.a. Siegal).
Click here for typical scene results.

3) Twenty test scenes were processed using the new URI/NOAA
Aeroplus processing scheme.
Click here for processing details.


The following SEADAS flags were used to eliminate (mask) pixels from the monthly mean 
chlorophyll and the monthly summary of the frequency of negative water-leaving radiance:

LAND
SUNGLINT
HIGHLT
STRAYLIGHT
CLDICE
EPSILON

Monthly mean chlorophyll (geometric mean) concentration was computed by averaging all 
non-masked log10-transformed chlorophyll observations for each pixel.