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Hp=10000; //pressure altitude in m
Po=4.24*10^4; //Total pressure measured by pitot tube,N/m^2
P1=2.65*10^4; //pressure at pressure altitude 10000m from standard atmospheric table,N/m^2
T=230; //ambient temperature in Kelvin
R=287 ;//gas constant for air,J/Kg.K
y=1.4; //specific heat ratio for air
a=340.3; //speed of sound at sea level,m/s
P=1.01*10^5 ;//stmospheric pressure at sea level
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