See my written notes 20 and 21 Dec 2021
---------------------------------------

* The files here were created using the usual procedures, working in:

  E:\Projects\NERC-NSF\Uncertainties\code_tests  and subdirectories thereof.

This work was done because my previous approach to var and covar of NCA (lambda and eta parameters)
yielded a negative total variance contribution of CO2 parameters.

* In these revised files the lambda parameters don't have covariances. See my notes for how they
  were done.
 

24 April 2023
-------------

This is the original NCA_rev directory that contains covmx files revised *after*
I uncovered the -ve contributions to the total variance (as described in the 
SI to the seawater model paper) and removed them. These are the ones used for
our paper.

This directory is now renamed NCA for distribution of software.

** MAKE SURE THE CORRECT DIRECTORY IS SPECIFIED IN THE Uncert.mst file **