The same way it makes sense for GPS to use Earth-based timescale instead of something like TCG[1] or TCB[2], it makes sense for lunar positioning to use lunar b

The same way it makes sense for GPS to use Earth-based timescale instead of something like TCG[1] or TCB[2], it makes sense for lunar positioning to use lunar based timescale. > There actually is a time zone called "GPS time", however, that explicitly doesn't include the relativistic effects It does include the relativistic effects of Earth [1] https://en.wikipedia.org/wiki/Geocentric_Coordinate_Time https://en.wikipedia.org/wiki/Geocentric_Coordinate_Time [2] https://en.wikipedia.org/wiki/Barycentric_Coordinate_Time https://en.wikipedia.org/wiki/Barycentric_Coordinate_Time