This file documents updates to the v4.0 data structure and release.

No data will be changed, but it may be added to.  Typically this will be in
an errata subdirectory.  In the event of a major issue, a new release would
be made with a different version number.


   Date      |    Notes
----------------------------------------------------------------------------
27 May 2019  | Initial release of:
             |   Product User Guide (v4.0)
             |   daily netCDFs  (sinusoidal and geographic projection, all products and subsets)
             |   5-day composite netCDFs (sine proj; all products and subsets)
             |   8-day composite netCDFs (sine proj; all products and subsets)
             |   monthly composite netCDFs (sine proj; all products and subsets)
             |   PNG visualisations of the above (rendered in geo projection only)
             |