WordNet
round-trip light time
n. the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point [syn: RTLT]
Usage examples of "round-trip light time".
She glanced at her watch and quickly computed twice the round-trip light time plus the minimum dura-tion of a physician's conference after the electronic diagnosis was complete-ly which time it might be too late.
She glanced at her watch and quickly computed twice the round-trip light time plus the minimum duration of a physician's conference after the electronic diagnosis was completely which time it might be too late.