Added example utility using OOPS and IODA

[CoryMartin-NOAA]

This PR adds a very simple utility that will read in a IODA file, and for a specified group/variable, compute the mean and print it out. Nothing too fancy but is a nice C++ OOPS example.

[CoryMartin-NOAA]

@guillaumevernieres make sure I didn't screw up the merge conflicts

[RussTreadon-NOAA]

Thank you for adding this oops example. This is a handy reference. Changes look good to my inexperienced eyes. I have not installed feature/oops_example on Hera or Orion and run ctests to ensure everything works a planned. Adding a CI label to this PR will do this for us.

[guillaumevernieres]

Thanks for doing this @CoryMartin-NOAA . I have a minor cosmetic comment that you can decide if you want to address or not. Ready to merge, pending CI results. Code norm to be added in a separate PR.

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: hera

Start: Tue Aug  8 15:04:31 UTC 2023 on hfe07
---------------------------------------------------
Build:                                  *FAILED*
Build: Failed at Tue Aug  8 15:32:10 UTC 2023
Build: see output at /scratch1/NCEPDEV/da/Cory.R.Martin/CI/GDASApp/workflow/PR/553/global-workflow/sorc/log.build

[CoryMartin-NOAA]

C++17 on Hera issue fixed by using a function that is 'older'. Not sure why that didn't build, I thought the compiler was new enough on Hera (this is concerning but we will cross that bridge later). Will try to loo into the failing tests some more now.

[CoryMartin-NOAA]

@RussTreadon-NOAA I bet this is the culprit: https://github.com/JCSDA-internal/ufo/commit/92f78421da2713bb256f8f758381381060bad6a2

sensorScanPosition is float in our files, it needs to be int.

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: hera

Start: Wed Aug  9 14:04:29 UTC 2023 on hfe07
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Wed Aug  9 15:12:50 UTC 2023
---------------------------------------------------
Tests:                                  *Failed*
Tests: Failed at Wed Aug  9 16:03:00 UTC 2023
Tests: 89% tests passed, 6 tests failed out of 54
	1232 - test_gdasapp_util_ioda_example (Failed)
	1595 - test_gdasapp_atm_jjob_var_run (Failed)
	1596 - test_gdasapp_atm_jjob_var_final (Failed)
	1598 - test_gdasapp_atm_jjob_ens_run (Failed)
	1599 - test_gdasapp_atm_jjob_ens_final (Failed)
Tests: see output at /scratch1/NCEPDEV/da/Cory.R.Martin/CI/GDASApp/workflow/PR/553/global-workflow/sorc/gdas.cd/build/log.ctest

[CoryMartin-NOAA]

Apparently the CI testing does not download the JCSDA test data. @guillaumevernieres @RussTreadon-NOAA should it do that? or should I just manually include/download a single IODA file for this test? I could include one in our testdata tar file.

[RussTreadon-NOAA]

Apparently the CI testing does not download the JCSDA test data. @guillaumevernieres @RussTreadon-NOAA should it do that? or should I just manually include/download a single IODA file for this test? I could include one in our testdata tar file.

Which approach is easier to implement now and maintain moving forward?

[CoryMartin-NOAA]

Probably cloning the jcsda test data, but it might be overkill. I'm happy to do that if we think that's the easiest path forward.

[guillaumevernieres]

Probably cloning the jcsda test data, but it might be overkill. I'm happy to do that if we think that's the easiest path forward.

@CoryMartin-NOAA , can you run your test with one of the soca ioda files? soca still uses git-lfs to store binaries.

[CoryMartin-NOAA]

I went with @guillaumevernieres 's suggestion, it now uses one of the SOCA test files that have brightnessTemperature as a variable.

[RussTreadon-NOAA]

test_gdasapp_util_ioda_example Passed on Orion following update at 55f1b6c.

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: hera

Start: Wed Aug  9 17:46:08 UTC 2023 on hfe07
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Wed Aug  9 18:34:49 UTC 2023
---------------------------------------------------
Tests:                                  *Failed*
Tests: Failed at Wed Aug  9 19:07:21 UTC 2023
Tests: 91% tests passed, 5 tests failed out of 54
	1607 - test_gdasapp_atm_jjob_var_run (Failed)
	1608 - test_gdasapp_atm_jjob_var_final (Failed)
	1610 - test_gdasapp_atm_jjob_ens_run (Failed)
	1611 - test_gdasapp_atm_jjob_ens_final (Failed)
Tests: see output at /scratch1/NCEPDEV/da/Cory.R.Martin/CI/GDASApp/workflow/PR/553/global-workflow/sorc/gdas.cd/build/log.ctest

[CoryMartin-NOAA]

The failures are unrelated to this PR it seems, but I defer to @RussTreadon-NOAA and @guillaumevernieres if we want to try to fix them before approving/merging this.

[RussTreadon-NOAA]

issue #554 has been opened to report the var_run and ens_run failures. A separate PR can be opened to resolve whatever isn't right. No need to hold up this PR for what seems to be an ioda or ufo problem.

[guillaumevernieres]

I've been voting for ignoring the atmos ctest for the last few pr's! Looks ready to merge. Thanks again @CoryMartin-NOAA .