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stdatms - Standard atmosphere computation program


stdatms [parameters] [value]


Command Line Resource Default Description
-h help No Lists basic help information.
-df=filename default .wxpdef Sets the name of the resource file.
-na=name name stdatms Specifies the name used in resource file parsing.
-ba batch No Run program in batch mode
-me=level message out2 Specifies level of messages to be displayed
  • output values - print
-va=units variable none
User prompt
Specifies which input variable and its units:
Hm, Hft, PmmHg, PinHg, Pmb, Ppsi, Ppas, Patm
-pa=parameter parameter none Specifies additional parameters.
value value none
User prompt
Specifies the input value.


The standard atmosphere calculation program relates pressure, height and temperature. The user is prompted for a height or pressure in one of the following units:

Variable/Type Explanation
Hm   Height in meters
Hft   Height in feet
PmmHg   Pressure in mm mercury
PinHg   Pressure in inches mercury
Pmb   Pressure in millibars
Ppsi   Pressure in pounds per square inch
Ppas   Pressure in Pascals
Patm   Pressure in atmospheres

Valid ranges include: -100 meters < height < 20000 meters, 1050 mb > pressure > 55 mb. Then, you enter one of the above parameters and units through a menu listing.

The program then calculates the height, pressure and temperature (in various units) at that specific level for a standard atmosphere. The output appears as:

Standard Atmosphere Data
Height          :          3000.0000 meters
                           9842.5197 feet
Pressure        :           701.0852 mb
                          70108.5156 pascals
                            525.8822 mm (Hg)
                             20.7032 in (Hg)
                             10.1684 PSI
                              0.6919 atmospheres
Temperature     :            -4.5000 Celsius
                             23.9000 Fahrenheit  



For further information about WXP, email technical-support@weather.unisys.com
Last updated by Dan Vietor on Aug 30, 1997