Fix issue 203a manual merge

[kkappler]

Manual merge passing (on 3.8) and ready to merge into FC branch.

[kkappler]

This PR supercedes fix_branch_203a which will be abandoned

[codecov[bot]]

Codecov Report

Merging #285 (9a10498) into fourier_coefficients (98f3862) will increase coverage by 1.34%. The diff coverage is 95.83%.

@@                   Coverage Diff                    @@
##           fourier_coefficients     #285      +/-   ##
========================================================
+ Coverage                 75.36%   76.71%   +1.34%     
========================================================
  Files                        86       86              
  Lines                      5525     5450      -75     
========================================================
+ Hits                       4164     4181      +17     
+ Misses                     1361     1269      -92     

Files Changed	Coverage Δ
aurora/transfer_function/kernel_dataset.py	71.28% <87.50%> (-6.91%)	:arrow_down:
aurora/pipelines/process_mth5.py	86.71% <100.00%> (+16.97%)	:arrow_up:
aurora/pipelines/transfer_function_kernel.py	87.92% <100.00%> (+28.91%)	:arrow_up:
tests/synthetic/test_fourier_coefficients.py	75.00% <100.00%> (-21.56%)	:arrow_down:
tests/synthetic/test_processing.py	94.48% <100.00%> (+1.63%)	:arrow_up: