`vecn = vecZ " x " vech`

Enter a value for all fields

This equation computes the Nodal Vector, `vecn`, which points in the direction of the orbit's ascending node -- the point where the orbit crosses the equator going from South to North.  The inputs are the x and y components of the angular momentum vector, `vech`.  The Nodal Vector is in the Equatorial plane.

Notes

`vecZ` is the unit vector in the polar direction.