Definition that contains elapsed time
- owlt the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object
- round-trip light time the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
- rtlt the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
- one-way light time the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object