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}]

round-trip time

(RTT) A measure of the current delay on a network, found by

timing a packet bounced off some remote host. This can be

done with {ping} -s.

(1994-11-30)