You're probably aware but I will just report it anyway.
On that link (https://james.darpinian.com/satellites/), there doesn't seem to be a lower bound limit on the 'polar angle' rotation. So I am able to rotate below the 'horizon' and look up to the earth's 'inner surface' (the concave side of the mesh). The trajectories dashed lines are still rendered and drawn on top of the earth's 'bottom' but are all glitchy and intermitent.
This maybe an issue with this specific implementation and not cesium itself but just thought you should know.
On that link (https://james.darpinian.com/satellites/), there doesn't seem to be a lower bound limit on the 'polar angle' rotation. So I am able to rotate below the 'horizon' and look up to the earth's 'inner surface' (the concave side of the mesh). The trajectories dashed lines are still rendered and drawn on top of the earth's 'bottom' but are all glitchy and intermitent.
This maybe an issue with this specific implementation and not cesium itself but just thought you should know.