Introduction.
=============

This directory structure contains the ESA Ocean Colour Climate Change Initiative
version 6.0 dataset release, consisting of uncertainty-characterised, level 3
mapped chlorophyll, remote sensing reflectance and inherent optical properties.

For more information, please:
 - read the quickstart and directory structure description below
 - download the Product User Guide (PUG) in the documentation directory
 - contact us at help@esa-oceancolour-cci.org


Quick start.
============

 - The geographic projection netCDFs will be most immediately usable in standard
   packages and programming libraries.  They are CF-convention compliant.

 - SNAP (http://step.esa.int/main/toolboxes/snap/) is a quick and well featured 
   tool for visualising and exploring the data.  Please see the User Guide (PUG) 
   in the documentation directory for examples o f how to use the program.

 - Browse to the appropriate netCDF level and download data.
  - Alternative browse methods can be found on http://www.oceancolour.org/

 - if you have problems, please read the Product User Guide (PUG) in the
   documentation directory or contact us at:

         help@esa-oceancolour-cci.org


What algorithms were used?
==========================

These choices were based on the results of the round-robin evaluation of
algorithms.  See the PUG for more details.

Chlorophyll: a blended merger of multiple algorithms (OCI, OCI2, OC2 and OCx)
             with the weighting determined by water class memberships
IOP:         QAA_v6G (with Zhang bb coefficients)
Kd490:       Lee variant (with Zhang bb coefficients)
Rrs:         Mixed - SeaDAS for SeaWiFS L2, Polymer for MERIS, MODIS, VIIRS 
and OLCI (S3A and S3B) L2, bandshifted to MERIS, cleaned up and merged.
Water types and uncertainty: following Tim Moore's approach with custom classes.