( ( ( The ( time interval ) ) ( -LRB- ( ( round trip ) -RRB- ) ) ) ( ( ( is then ) ( ( ( ( converted , ) ( using ( a ( two-way ( velocity-of-light factor ) ) ) ) ) , ) ( to ( ( give ( the distance ) ) ( to ( the target ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN time) (NN interval)) (PRN (-LRB- -LRB-) (NP (NN round) (NN trip)) (-RRB- -RRB-))) (VP (VBZ is) (ADVP (RB then)) (VP (VBN converted) (, ,) (S (VP (VBG using) (NP (DT a) (JJ two-way) (JJ velocity-of-light) (NN factor)))) (, ,) (S (VP (TO to) (VP (VB give) (NP (DT the) (NN distance)) (PP (TO to) (NP (DT the) (NN target)))))))) (. .)))
The time interval (round trip) is then converted, using a two-way velocity-of-light factor, to give the distance to the target.
(ROOT (S (NP (NP (NNP Distance)) (PP (IN over) (NP (NP (NN time)) (PP (IN in) (NP (DT a) (VBN given) (NN direction)))))) (VP (VBZ determines) (NP (NN velocity))) (. .)))