Investigate nightly build output wind direction differences caused by machine precision.

Note that this issue originally indicated that issues in Grid-Stat and Madis2NC should be investigated. However, the Madis2NC details were moved to a separate issue #2028 that @hsoh-u is investigating.

There are differences in the output generated from the MET-develop-ref data between machines. This is likely due to something different with an external dependency.

I copied data from the nightly builds from seneca and kiowa into a directory on seneca and ran the comp_dir.sh script.

Files are under:
/d1/personal/mccabe/kiowa_vs_seneca

> comp_dir_grid_stat.log
> comp_dir_madis2nc.log

These log files were generated by running the following commands:

`~mccabe/MET/test/bin/comp_dir.sh /d1/personal/mccabe/kiowa_vs_seneca/kiowa/NB20220125/MET-develop-ref/test_output/grid_stat /d1/personal/mccabe/kiowa_vs_seneca/seneca/NB20220125/MET-develop-ref/test_output/grid_stat &> comp_dir_grid_stat.log`

> 
> COMPARING grid_stat_GFS_FOURIER_240000L_20120410_000000V_pairs.nc
> file1: /d1/personal/mccabe/kiowa_vs_seneca/kiowa/NB20220125/MET-develop-ref/test_output/grid_stat/grid_stat_GFS_FOURIER_240000L_20120410_000000V_pairs.nc
> file2: /d1/personal/mccabe/kiowa_vs_seneca/seneca/NB20220125/MET-develop-ref/test_output/grid_stat/grid_stat_GFS_FOURIER_240000L_20120410_000000V_pairs.nc
> passed numerical var CLIMO_MEAN_HGT_P500_FULL
> passed numerical var CLIMO_MEAN_HGT_P500_FULL_WV1_0-3.
> ..
> passed numerical var FCST_HGT_P500_FULL
> passed numerical var FCST_HGT_P500_FULL_WV1_0-3
> **ERROR: found     2 differences in var FCST_HGT_P500_FULL_WV1_0-72            - max abs: 0.0004882812**
> passed numerical var FCST_HGT_P500_FULL_WV1_10-20
> ...
> 
> COMPARING grid_stat_GFS_FOURIER_240000L_20120410_000000V.stat
> file1: /d1/personal/mccabe/kiowa_vs_seneca/kiowa/NB20220125/MET-develop-ref/test_output/grid_stat/grid_stat_GFS_FOURIER_240000L_20120410_000000V.stat
> file2: /d1/personal/mccabe/kiowa_vs_seneca/seneca/NB20220125/MET-develop-ref/test_output/grid_stat/grid_stat_GFS_FOURIER_240000L_20120410_000000V.stat
> ERROR: found     8 differences in row type CNT          column FBAR          - max abs: 0.00000000000000008326
> ERROR: found     8 differences in row type CNT          column OBAR          - max abs: 0.00000000000000002775
> ERROR: found     8 differences in row type CNT          column ME            - max abs: 0.000000000000000013115
> ERROR: found     8 differences in row type CNT          column ME2           - max abs: 0.0000000000000000000000000000000022368
> ERROR: found     8 differences in row type SAL1L2       column FABAR         - max abs: 0.00000000000000006939
> ERROR: found     8 differences in row type SAL1L2       column OABAR         - max abs: 0.0000000000000000763
> ERROR: found     8 differences in row type SL1L2        column FBAR          - max abs: 0.00000000000000008326
> ERROR: found     8 differences in row type SL1L2        column OBAR          - max abs: 0.00000000000000002775
> ERROR: found     2 differences in row type VAL1L2       column UFABAR        - max abs: 0.0000000000000000001999
> ERROR: found     2 differences in row type VAL1L2       column VFABAR        - max abs: 0.000000000000000003469
> ERROR: found     2 differences in row type VAL1L2       column UOABAR        - max abs: 0.000000000000000001735
> ERROR: found     2 differences in row type VAL1L2       column VOABAR        - max abs: 0.00000000000000000165
> ERROR: found     2 differences in row type VCNT         column FBAR_SPEED    - max abs: 0.000000000000000004651
> ERROR: found     2 differences in row type VCNT         column OBAR_SPEED    - max abs: 0.000000000000000001861
> ERROR: found     2 differences in row type VCNT         column VDIFF_SPEED   - max abs: 0.000000000000000003135
> ERROR: found     2 differences in row type VCNT         column SPEED_ERR     - max abs: 0.000000000000000002968
> ERROR: found     2 differences in row type VCNT         column SPEED_ABSERR  - max abs: 0.000000000000000002968
> **ERROR: found     2 differences in row type VCNT         column DIR_ERR       - max abs: 2.3507
> ERROR: found     2 differences in row type VCNT         column DIR_ABSERR    - max abs: 2.3507**
> ERROR: found     2 differences in row type VL1L2        column UFBAR         - max abs: 0.00000000000000000094864
> ERROR: found     2 differences in row type VL1L2        column VFBAR         - max abs: 0.000000000000000005204
> ERROR: found     2 differences in row type VL1L2        column UOBAR         - max abs: 0.000000000000000000867
> ERROR: found     2 differences in row type VL1L2        column VOBAR         - max abs: 0.000000000000000001952
> 
> SUMMARY for non-bootstrap numerical values
> \# comparisons: 1575
> \# differences: 94
>        Min.: -2.3507
>     1st Qu.: -1.844e-18
>      Median: -2.4458e-19
>        Mean: -0.05001489
>     3rd Qu.: 1.2587e-18
>        Max.: 1.48229
> 
> **ERROR: failed tests for CNT: num
> ERROR: failed tests for SAL1L2: num
> ERROR: failed tests for SL1L2: num
> ERROR: failed tests for VAL1L2: num
> ERROR: failed tests for VCNT: num
> ERROR: failed tests for VL1L2: num**


`~mccabe/MET/test/bin/comp_dir.sh /d1/personal/mccabe/kiowa_vs_seneca/kiowa/NB20220125/MET-develop-ref/test_output/madis2nc /d1/personal/mccabe/kiowa_vs_seneca/seneca/NB20220125/MET-develop-ref/test_output/madis2nc &> comp_dir_madis2nc.log`

>
> COMPARING profiler_2012040912_F000.nc
> file1: /d1/personal/mccabe/kiowa_vs_seneca/kiowa/NB20220125/MET-develop-ref/test_output/madis2nc/profiler_2012040912_F000.nc
> file2: /d1/personal/mccabe/kiowa_vs_seneca/seneca/NB20220125/MET-develop-ref/test_output/madis2nc/profiler_2012040912_F000.nc
> ERROR: NetCDF headers differ:
> 11c11
> \<       nobs_qty = 2 ;
> ---
> \>       nobs_qty = 1 ;


## Describe the Task ##
Investigate these differences and create a GitHub issue if a fix to the source code would prevent these differences. If changes to the external libraries used to build MET on seneca resolve these differences, then document those changes on this issue.

### Time Estimate ###
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*Issues should represent approximately 1 to 3 days of work.*

### Sub-Issues ###
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- [ ] *Add a checkbox for each sub-issue here.*

### Relevant Deadlines ###
*List relevant project deadlines here or state NONE.*

### Funding Source ###
*Define the source of funding and account keys here or state NONE.*

## Define the Metadata ##

### Assignee ###
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- [ ] Select **Milestone** as the next official version or **Future Versions**

## Define Related Issue(s) ##
Consider the impact to the other METplus components.
- [ ] [METplus](https://github.com/dtcenter/METplus/issues/new/choose), [MET](https://github.com/dtcenter/MET/issues/new/choose), [METdatadb](https://github.com/dtcenter/METdatadb/issues/new/choose), [METviewer](https://github.com/dtcenter/METviewer/issues/new/choose), [METexpress](https://github.com/dtcenter/METexpress/issues/new/choose), [METcalcpy](https://github.com/dtcenter/METcalcpy/issues/new/choose), [METplotpy](https://github.com/dtcenter/METplotpy/issues/new/choose)

## Task Checklist ##
See the [METplus Workflow](https://metplus.readthedocs.io/en/latest/Contributors_Guide/github_workflow.html) for details.
- [ ] Complete the issue definition above, including the **Time Estimate** and **Funding Source**.
- [ ] Fork this repository or create a branch of **develop**.
Branch name: `feature_<Issue Number>_<Description>`
- [ ] Complete the development and test your changes.
- [ ] Add/update log messages for easier debugging.
- [ ] Add/update unit tests.
- [ ] Add/update documentation.
- [ ] Push local changes to GitHub.
- [ ] Submit a pull request to merge into **develop**.
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Select: **Reviewer(s)** and **Linked issues**
Select: **Repository** level development cycle **Project** for the next official release
Select: **Milestone** as the next official version
- [ ] Iterate until the reviewer(s) accept and merge your changes.
- [ ] Delete your fork or branch.
- [ ] Close this issue.


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Investigate nightly build output wind direction differences caused by machine precision. #2027

Describe the Task

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Development

Investigate nightly build output wind direction differences caused by machine precision. #2027

Description

Describe the Task

Time Estimate

Sub-Issues

Relevant Deadlines

Funding Source

Define the Metadata

Assignee

Labels

Projects and Milestone

Define Related Issue(s)

Task Checklist

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

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