rtlt   (TTS Sound)

The rtlt has 1 Senses.

• rtlt, 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
• 信号が地球から宇宙船（または他の天体）まで届き、出発点に帰って来るのに要する経過時間