NaN values are not allowed in Argo NetCDF variables

[tcarval]

NaN values are not allowed in Argo NetCDF variables.
The file format checker should report an error on NaN value in any variable.

A general check should be performed on GDAC to detect the existing NaN errors.

[jegilson]

I agree with implementation of a general check to flag all netCDF with NaN.

[MarkIggy]

NaN checks are currently in place for all -related variables (physical parameters) in both profile and trajectory files.

NaNs are only an issue for floating-point data types - float and double. Adding NaN checks to any of the variables that are already checked by the FileChecker would be relatively straightforward. Adding NaN checks for every float/double variable in all of the file types will probably

I will have to review the file specfications to see how extensive the changes will be for adding NaN checks for every float/double variable.