Function lupnt::RotBodyCiToFixed

• Defined in File frame_conversions.h

Function Documentation

Mat3 lupnt::RotBodyCiToFixed(Real t_tdb, BodyId body, Mat3 *R_dot = nullptr)

Rotation matrix from a planet-centered inertial frame (ICRF-aligned) to that planet’s body-fixed frame at t_tdb, from the IAU linear orientation model. If R_dot is non-null it receives the exact time derivative (used to rotate velocities), dominated by the prime-meridian spin rate.

Parameters:

• t_tdb – Epoch [s, TDB since J2000]

• body – Planet body id (Mercury..Neptune)

• R_dot – Optional out: d/dt of the rotation matrix [1/s]