Use normalization to compute echo range scaling

[ctuguinay]

Enforces normalization of beam direction z if normalization of the beam direction vector is not already present. If vector is all zeros, return NaN.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.17%. Comparing base (9f56124) to head (96c2ea3).
Report is 194 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1463       +/-   ##
===========================================
+ Coverage   83.52%   95.17%   +11.65%     
===========================================
  Files          64        5       -59     
  Lines        5686      311     -5375     
===========================================
- Hits         4749      296     -4453     
+ Misses        937       15      -922     

Flag	Coverage Δ
unittests	95.17% <100.00%> (+11.65%)	⬆️

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[ctuguinay]

@leewujung This should be ready for review