Const
Axes of the coordinate frame E (Earth-Centred, Earth-Fixed, ECEF) when the z-axis points to the North Pole.
The z-axis points to the North Pole and x-axis points to the point where latitude = longitude = 0. This choice is very common in many fields.
https://github.com/FFI-no/n-vector/blob/f77f43d18ddb6b8ea4e1a8bb23a53700af965abb/nvector/R_Ee.m#L48
Axes of the coordinate frame E (Earth-Centred, Earth-Fixed, ECEF) when the z-axis points to the North Pole.
The z-axis points to the North Pole and x-axis points to the point where latitude = longitude = 0. This choice is very common in many fields.