P3 aspect ratio derivation

[rorlija1]

• Added a short explanation of how aspect ratio is derived to the docs page.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.74%. Comparing base (af77c95) to head (8c38beb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #438   +/-   ##
=======================================
  Coverage   96.74%   96.74%           
=======================================
  Files          40       40           
  Lines        1415     1415           
=======================================
  Hits         1369     1369           
  Misses         46       46           

Components	Coverage Δ
src	98.71% <ø> (ø)
ext	69.79% <ø> (ø)

[trontrytel]

Thank you!