"Inclination is the angle of the orbit in relation to Earth’s equator. A satellite that orbits directly above the equator has zero inclination. If a satellite orbits from the north pole (geographic, not magnetic) to the south pole, its inclination is 90 degrees." (National Aeronautics and Space Administration, 2009)
"Catalog of Earth Satellite Orbits". Earth Observatory, National Aeronautics and Space Administration. Last modified September 4, 2009.
Accessed February 1, 2019.