Kinematic characteristics of the orbital trihedron

The relations for calculating the kinematic characteristics of the orbital trihedron modeling the orbital coordinate system of the spacecraft are derived. These include relations for the components of the angular acceleration vector, the calculation of which meets certain difficulties due to the need to take into account the influence of disturbing accelerations on the orbital motion of the spacecraft, caused by the non-centrality of the planet’s gravity field and other forces of non-gravitational nature.