The ground (down) and sky (up) would be valid all the time where-ever you go. They just update themselves creating the same infinity for the up and down direction in space. This is true for all directions. Wherever you go in space, you are the center. The point of consciousness is the source of everything and its radiating/projecting outwards. Its like you are in the middle of the ocean all the time, wherever you look you would find yourself with the same expansive infinity on all sides. You can compare yourself with other boats around you, but that depends on what direction you choose for the measurement.