Bugfix #3362 main_v12.2 seeps_pairs_nc

[JohnHalleyGotway]

Expected Differences

This PR provides as limited of a fix as possible for the main_v12.2 branch. This will modify the variables timing attributes in one Grid-Stat NetCDF matched pairs output file from SEEPS.

• Do these changes introduce new tools, command line arguments, or configuration file options? [No]
  
  If yes, please describe:
  

• Do these changes modify the structure of existing or add new output data types (e.g. statistic line types or NetCDF variables)? [No]
  
  If yes, please describe:
  

Pull Request Testing

• Describe testing already performed for these changes:
  
  Manually ran the updated unit test to confirm the expected change to the test output.

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  
  Review the modified Grid-Stat output file and confirm that the timing info is no longer reported as unixtime = 0.

Please find the code compiled on seneca in:

/d1/projects/MET/MET_pull_requests/met-12.2.2/MET-bugfix_3362_main_v12.2_seeps_pairs_nc

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes]
  None needed.

• Do these changes include sufficient testing updates? [Yes]
  Code changes modifies existing unit test output.

• Will this PR result in changes to the MET test suite? [Yes]
  
  If yes, describe the new output and/or changes to the existing output:
  
  One Grid-Stat NetCDF matched pairs output file is modified.

Note

I found that NetCDF variable attribute differences are NOT currently flagged by the METplus diffing logic. Work to update the METplus diffing logic is in progress in the bugfix_MET_3362_diff_nc_var_att branch.

• Will this PR result in changes to existing METplus Use Cases? [Maybe?]
  
  If yes, create a new Update Truth METplus issue to describe them.
  I'm not sure if any existing use cases generate Grid-Stat SEEPS output and write a NetCDF matched pairs output file. If so, then they'll be impacted.

• Do these changes introduce new SonarQube findings? [Yes or No]
  
  If yes, please describe:

• Please complete this pull request review by [Monday, March 16, 2026].
  

Pull Request Checklist

See the METplus Workflow for details.

• Review the source issue metadata (required labels, projects, and milestone).
• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s) and Development issue
  Select: Milestone as the version that will include these changes
  Select: METplus-X.Y Support project for bugfix releases or MET-X.Y Development project for the next coordinated release
• After submitting the PR, select the ⚙️ icon in the Development section of the right hand sidebar. Search for the issue that this PR will close and select it, if it is not already selected.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud