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   Atmosphere Help		   Your source for:
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  Using the Standard Atmosphere Calculator

Example 1:

As with most of the site's calculators entering data involves highlighting the field that corresponds to the data you have and then typing over it. For example if you want to know what are the properties of standard atmosphere at 8000 feet of altitude above sea level, you begin by highlighting the corresponding field in feet. In this case we're talking about geometric altitude Z.Next, you can enter the 8000 value.

As you finish entering the value, all the other properties are calculated for you. In this case the information that you obtain for the altitude of 8000 ft includes:

  a -  The temperature in Celsius is -0.8435 oC or rounded up -0.8 oC.
  b -  The temperature in Fahrenheit is 30.4817 oF or rounded up 30.5 oF.
  c - The pressure ratio is 7.42869e-1 or 0.74 which equals74%. This means the pressure is 74% of that at sea level.
  d - The air pressure is 2.22276e+1 inHg or approximately 22.2 inHg.
  e - The density ratio is 7.86091e-1 or about 0.79 which equals 79%. Therefore the air has 79% of the density and compared to sea level air.
  f - Acceleration of gravity ratio is 0.99923. In other words the acceleration of gravity (g) is 99.923% of that at sea level.
  g - The speed of sound is 330.807 m/s, or rounded up is 331 m/s. You can also see the other values in ft/s and knots.
 
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