Add PlanetiQ YAM-8 in global_convinfo_2mObs.txt

[XuanliLi-NOAA]

Updated global_convinfo_2mObs.txt to include PlanetiQ YAM-8 data (SAID=768) as suggested by @CoryMartin-NOAA and @ADCollard .

[RussTreadon-NOAA]

Same as GSI-fix PR #47 but for global_convinfo_2mObs.txt.

Approve.

[RussTreadon-NOAA]

It would be good to implement was way to not need to maintain two sets of global_convinfo files: (a) global_convinfo.txt and (b) global_convinfo_2mObs.txt. It's easy to see how future updates to one could be missed in the other.

[RussTreadon-NOAA]

Convert this PR to draft to align with GSI PR #930.

[RussTreadon-NOAA]

@CatherineThomas-NOAA, @ClaraDraper-NOAA, @ADCollard, @CoryMartin-NOAA : What are our plans for global_convinfo.txt moving forward? We currently have global_convinfo.txt, global_convinfo_2mObs.txt, and on-the-fly construction of convinfo via create_gsi_info.sh.

This PR was opened to add gps 768 to global_convinfo_2mObs.txt. GSI-fix PR #47 previously added gps 768 to global_convinfo.txt.

Remembering to update both global_convinfo.txt and global_convinfo_2mObs.txt is problematic. One or the other will be forgotten and unintended differences will creep in. I guess the intention of the create_gsi_info.sh approach is to replace two static files with a single dynamically generated convinfo.

DA scripts in g-w currently support both the static and dynamic convinfo approaches.

if [[ "${CONVINFO}" == "generate" ]]; then
    "${USHgfs}/create_gsi_info.sh" conv "${PDY}${cyc}" "${DATA}" "${USE_2M_OBS}"
else
    ${NLN} "${CONVINFO}" convinfo
fi

When we move to JEDI atmospheric DA we can use the jcb-gdas observation_chronicle. GFS v17 maintains GSI atmospheric DA. Hence my question about our plans for maintaining the GSI info files until we fully pivot to JEDI.

[ClaraDraper-NOAA]

I originally added the _2m option as a temporary file while we developed the 2mDA. Since the 2m obs are now being included in GFSv17, I suggest that we add the 2m obs to global_convinfo and remove the separate _2m file.

[RussTreadon-NOAA]

I originally added the _2m option as a temporary file while we developed the 2mDA. Since the 2m obs are now being included in GFSv17, I suggest that we add the 2m obs to global_convinfo and remove the separate _2m file.

Thank you @ClaraDraper-NOAA for the explanation. I agree. global_convinfo_2mObs.txt and global_convinfo.txt can be merged into a single file, global_convinfo.txt.

[ClaraDraper-NOAA]

Note this related problem with the 2m obs quality control when global_convinfo is dynamically generated.