Nodal Regression and Sun-synchronous Orbits

This lecture covers the progression of nodes in space mission design, focusing on nodal regression and Sun-synchronous orbits. It explains the effects of Earth's equatorial bulge on orbital dynamics, the forces and torques involved in nodal regression for Low Earth Orbit (LEO), and the calculation of nodal regression rate. Additionally, it discusses how the nodal regression rate varies with orbital inclination and altitude, highlighting the drift of the line of nodes for different types of orbits. The lecture also delves into the requirements and specific inclinations and altitudes for achieving a Sun-synchronous orbit.