: Secret aries ▁of ▁State ▁of ▁Iowa ▁Category : 1 8 2 7 ▁birth s ▁Category : 1 8 9 5 ▁death s ▁Category : Pe ople ▁from ▁S alem , ▁Ohio ▁ ▁Category : 1 9 th - century ▁American ▁polit icians <0x0A> </s> ▁A ▁reference ▁atmos pher ic ▁model ▁describe ▁how ▁the ▁ideal ▁gas ▁properties ▁( nam ely : ▁pressure , ▁temperature , ▁density , ▁and ▁mole cular ▁weight ) ▁of ▁an ▁atmosphere ▁change , ▁primarily ▁as ▁a ▁function ▁of ▁alt itude , ▁and ▁sometimes ▁also ▁as ▁a ▁function ▁of ▁latitude , ▁day ▁of ▁year , ▁etc . ▁A ▁static ▁atmos pher ic ▁model ▁has ▁a ▁more ▁limited ▁domain , ▁ex cluding ▁time . ▁A ▁standard ▁atmosphere ▁is ▁defined ▁by ▁the ▁World ▁Meteor ological ▁Organ ization ▁as ▁" a ▁hypoth et ical ▁vertical ▁distribution ▁of ▁atmos pher ic ▁temperature , ▁pressure ▁and ▁density ▁which , ▁by ▁international ▁agreement , ▁is ▁roughly ▁representative ▁of ▁year - round , ▁mid lat itude ▁conditions ." ▁▁ ▁Typ ical ▁us ages ▁are ▁as ▁a ▁basis ▁for ▁pressure ▁alt imeter ▁cal ibr ations , ▁aircraft ▁performance ▁calculations , ▁aircraft ▁and ▁ro cket ▁design , ▁ball istic ▁tables , ▁and ▁meteor ological ▁diag rams ." ▁ ▁For ▁example , ▁the ▁U . S . ▁Standard ▁At mos phere ▁der ives ▁the ▁values ▁for ▁air ▁temperature , ▁pressure , ▁and ▁mass ▁density , ▁as ▁a ▁function ▁of ▁alt itude ▁above ▁sea ▁level . ▁ ▁Other ▁static ▁atmos pher ic ▁models ▁may ▁have ▁other ▁outputs , ▁or ▁depend ▁on