( ( Common ( solar ( radiation ( measurement units ) ) ) ) ( ( are ( ( ( ( ( ( ( langleys , ) ( Btus ( per ( square foot ) ) ) ) , ) ( kilojoules ( per ( square meter ) ) ) ) , ) and ) ( watts ( per ( square meter ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Common) (JJ solar) (NN radiation) (NN measurement) (NNS units)) (VP (VBP are) (NP (NP (NP (NNS langleys)) (, ,) (NP (NP (NNP Btus)) (PP (IN per) (NP (JJ square) (NN foot))))) (, ,) (NP (NP (NNS kilojoules)) (PP (IN per) (NP (JJ square) (NN meter)))) (, ,) (CC and) (NP (NP (NNS watts)) (PP (IN per) (NP (JJ square) (NN meter)))))) (. .)))
Common solar radiation measurement units are langleys, Btus per square foot, kilojoules per square meter, and watts per square meter.
(ROOT (S (NP (NNS Kilojoules)) (VP (VBP are) (ADVP (RB typically)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NP (NNP heats)) (PP (IN of) (NP (NN reaction))))))))) (. .)))