fix: extract variables for FES2012 ocean tide

[tsutterley]

No description provided.

[codecov]

Codecov Report

Patch coverage: 39.62% and project coverage change: -0.23 ⚠️

Comparison is base (f6a41cd) 70.37% compared to head (3b06915) 70.14%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #212      +/-   ##
==========================================
- Coverage   70.37%   70.14%   -0.23%     
==========================================
  Files          43       43              
  Lines        8910     9003      +93     
  Branches      982      995      +13     
==========================================
+ Hits         6270     6315      +45     
- Misses       2288     2333      +45     
- Partials      352      355       +3     

Flag	Coverage Δ
unittests	70.14% <39.62%> (-0.23%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pyTMD/io/FES.py	46.05% <0.00%> (ø)
pyTMD/utilities.py	52.12% <35.48%> (-1.38%)	⬇️
pyTMD/io/model.py	57.38% <100.00%> (ø)
test/test_utilities.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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