1976 Standard Atmosphere Calculator

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Altitude:	feet kilometers meters nautical miles
Temperature:	Celsius Kelvin Fahrenheit Rankine Réaumure
Pressure:	atmospheres (SL std=1) inches of mercury millibars pascals pounds-force/sq. foot pounds-force/sq.inch
Density:	kilograms/cubic meter sigma [SL std=1] slugs/cubic foot
Speed of sound:	feet/second kilometers/hour knots meters/second
Dynamic viscosity:	N / square meter pascal second poise centipoise pound force second / square feet