Evolve QC_flag to identify QC test

[vturpin]

Moderator: @OceanGlidersCommunity/format-maintainers

This note was written in the draft OG1.0. We turn it into an issue to keep this topic live and anticipate future release.

Note: It is anticipated to upgrade the ancillary variable related to QC by refining the ancillary variable name like < PARAM >_qc_generic, < PARAM >_qc_spike_test, _qc_land_test, etc. Current _QC attributes based on CF guidance (http://cfconventions.org/Data/cf-conventions/cf-conventions-1.10/cf-conventions.html#flags) and use the GOOS networks 0-4 flagging convention.

[jenseva]

Sorry I missed the conversation about qc flags!

I believe GOOS is following the IOC flag scheme documented here: Paris. Intergovernmental Oceanographic Commission of UNESCO, 2013. Ocean Data Standards, Vol.3:Recommendation for a Quality Flag Scheme for the Exchange of Oceanographic and Marine Meteorological Data. (IOC Manuals and Guides, 54, Vol. 3.) 12 pp. (English.)(IOC/2013/MG/54-3) https://repository.oceanbestpractices.org/bitstream/handle/11329/413/MG54_3.doc

In my latest files, I provide this reference as an attribute on each of the qc variables. Examples of that metadata (for a delayed mode data collection) are here: https://spraydata.ucsd.edu/erddap/info/scrippsGlidersSQ/index.html. This dataset includes a primary and secondary flag scheme.

[vturpin]

Hi Jen,
Yes I think this is exactly the same reference. @justinbuck will confirm !

Do you use the Quartod methodology for this ? If yes, how do you map the QUARTOD flag with "GOOS/IOC" flags ?
I did not get the point on primary and secondary flags.