( ( E Earth ) ( ( station ( ( A ( satellite ( communications device ) ) ) ( located ( on ( ( the ( Earth 's ) ) surface ) ) ) ) ) . ) )
(ROOT (S (NP (NNP E) (NNP Earth)) (VP (VBZ station) (NP (NP (DT A) (NN satellite) (NNS communications) (NN device)) (VP (VBN located) (PP (IN on) (NP (NP (DT the) (NN Earth) (POS 's)) (NN surface)))))) (. .)))
E Earth station A satellite communications device located on the Earth's surface.
(ROOT (S (NP (NNS Satellites)) (VP (VBP are) (NP (NP (JJ man-made) (NNS devices)) (PP (IN in) (NP (NN space))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN used) (S (VP (TO to) (VP (VB observe) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))))) (. .)))