Feature/gsibec

[RussTreadon-NOAA]

This PR is opened to add GSI static B as a new option for the background error covariance used by fv3jedi_var.x.

Issue #166 documents the changes in branch feature/gsibec, This branch has been built on Hera and Orion. 3dvar tests have been successfully run using GSI static B on both machines.

Updates to the g-w to use GSI static B have been committed to g-w branch feature/staticb and are documented in g-w issue #1103. The combination of GDASApp branch feature/gsibec and g-w branch feature/staticb have been used to run a UFS DA cycling parallel on Hera.

[RussTreadon-NOAA]

Note: The corresponding g-w changes are in g-w PR #1104.

[CoryMartin-NOAA]

One comment and one question, thanks a lot @RussTreadon-NOAA for getting this going!

[guillaumevernieres]

👍

[emcbot]

Automated Pull Request Testing Results:
Machine: hera

Start: Thu Nov  3 20:00:22 UTC 2022 on hfe10
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Thu Nov  3 21:15:09 UTC 2022
---------------------------------------------------
Tests:                                 *SUCCESS*
Tests: Completed at Thu Nov  3 21:17:27 UTC 2022
Tests: 100% tests passed, 0 tests failed out of 18

[emcbot]

Automated Pull Request Testing Results:
Machine: orion

Start: Thu Nov  3 15:04:33 CDT 2022 on Orion-login-1.HPC.MsState.Edu
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Thu Nov  3 17:36:52 CDT 2022
---------------------------------------------------
Tests:                                 *SUCCESS*
Tests: Completed at Thu Nov  3 17:41:56 CDT 2022
Tests: 100% tests passed, 0 tests failed out of 18

[RussTreadon-NOAA]

@CoryMartin-NOAA and @guillaumevernieres , I do not plan on making any more changes to feature/gsibec. This PR is ready for review.

• @guillaumevernieres , you already gave your approval but a subsequent commit by me made your review obsolete. Would you mind reviewing again?
• @CoryMartin-NOAA , I see that you are on leave today. That fine. If you can review early next week, this is would much appreciated.

@KateFriedman-NOAA , once this PR is merged into GDASApp develop, I will open a short g-w PR to update the GDASApp hash in Externals.cfg and checkout.sh.

[guillaumevernieres]

Looks good @RussTreadon-NOAA .

[CoryMartin-NOAA]

Changes look great, thanks @RussTreadon-NOAA !