Orthonormal axes of the plane whose pole is pole (a unit vector): z
along the pole, x along the plane's ascending node on the reference
plane (ẑ × pole — the standard origin for that plane's longitudes), y
completing a right-handed set. A pole along ±z has no node, so x falls
back to the reference +x.
Orthonormal axes of the plane whose pole is
pole(a unit vector): z along the pole, x along the plane's ascending node on the reference plane (ẑ × pole — the standard origin for that plane's longitudes), y completing a right-handed set. A pole along ±z has no node, so x falls back to the reference +x.