Surf with confidence!
  Site has been tested by:
    Norton™ Safe Web
    McAfee SiteAdvisor ®

1976 Publication vs
Online Calculator

   Your source for:
Online Aviation Instrument Simulators + E6b, CR3 and other Flight Computer Calculators
 
 
Back to calculator  
 

Comparing this calculator to the actual 1976 Standard Atmosphere tables

U.S. Standard Atmosphere, 1976 Publication Excerpt:

Below are three tables that were extracted from the actual publication by the National Oceanic and Atmospheric Administration, National Aeronautics and Space Administration and the United States Airforce in Washington, D.C., October 1976. In this case we chose an arbitrary value of 3000 m for Z.
U.S. Standard Atmosphere, 1976 Publication Tables I, II, and III excerpt, marked with labels for comparison with luizmonteiro's calculator.

luizmonteiro.com's 1976 Standard Atmosphere Calculator

Below are the corresponding values using luizmonteiro.com's 1976 Standard Atmosphere calculator. We typed in 3000 in the Geometric Altitude (Z) field in meters to set the calculator. Note that almost all the values are the same down to the last decimal point for most of the properties. The few discrepancies found are errors in the actual publication and not our calculator.luizmonteiro's calculator results labeled for comparison with U.S. Standard Atmosphere, 1976 Publication Tables I, II, and III.

Discrepancies (if Any)

There are minor discrepancies due to rounding error in the order of 0.008% or less and one large discrepancy due to an error in the actual publication.

Property

Actual Publication

 Our Site's Calculator Difference % Explanation
a 3000 3000 0 exactly the same
b 2999 2999 0 exactly the same
c 268.659 268.659 0 exactly the same
d -4.491 -4.491 0 exactly the same
e 268.659 268.659 0 exactly the same
f 7.0121e+2 7.0121e+2 0 exactly the same
g 5.2595e+2 5.2595e+2 0 exactly the same
h 6.9204e-1 6.9204e-1 0 exactly the same
i 9.0925e-1 9.0925e-1 0 exactly the same
j 7.4225e-1 7.4225e-1 0 exactly the same
k 9.7974 9.7974 0 exactly the same
l 7871.4 7871.4 0 exactly the same
m 1.8905e+25 1.8905e+25 0 exactly the same
n 443.15 443.15 0 exactly the same
o 4.9588e+9 4.9588e+9 0 exactly the same
p 8.9367e-8 8.9367e-8 0 exactly the same
q 28.964 28.964 0 exactly the same
r 328.58 328.58 0 exactly the same
s 1.6938e-5 1.6938e-5 0 exactly the same
t 9.4656e-1 9.4656e-1 0 exactly the same
u 1.8628e-5 1.8628e-5 0 exactly the same
v 1.2752e+0 1.2753e+0 0.008% rounding error in publication
w 2.3813e-5 2.3779e-2 997% error in publication
x 9.3891e-1 9.3892e-1 0.001% rounding error in publication

Conclusion

In this example you can see that our calculator precisely adheres to the standards outlined by the U.S. Standard Atmosphere, 1976 publication at the examples's datapoint..

  
Back to calculator  
 


   
 
  Navigation Simulator  
  Practice in our simulator specifically designed for learning the basics of instrument navigation. Try the Navigation Simulator, available for Windows PC. Now completely free, forever!. There is also an online version that runs directly on this website, and can be viewed on a Windows PC, Mac, or Linux OS.  
 

 

 

   
 
  Free Online Simulators
No installation required. These simulators are ready to run on your web browser and have a rich set of features. Practice basic VOR, ADF, RMI and HSI intrument orientation and execute holding patterns. Other simulators include pitot static system and altimeter errors. Click here to go to main online simulator page.		  
 



 

Units and Abbreviations

Length or Distance
m -  meters
ft -  feet
in -  inches
sm -  statute miles
 

Temperature
oF -  degrees Fahrenheit 
oC -  degrees Celsius 
oR -  degrees Rankine 
K -  Kelvin
 

Weight and Mass
lbs -  pounds
slug -  slug
kg -  kilogram
 

Ammount of Molecules
kmol -  kilomole
lbmol -  pound-mole
 

Force
N -  Newtrons
lbf -  pound-force
 

Pressure
InHg -  Inches of Mercury
Pa -  Pascal
N/m2 -  Newtrons per square meter
hPa -  hectopascal
mmHg -  milimeters of mercury
lbf /ft2 -  pounds of force per square feet 
lbf /in2 -  pounds of force per square inch 
torr -  torr (Torricelli)
mbar -  milibar(s)
 

Speed
knots or kts-  knots (Nm/h)
ft/s -  feet per second
m/s -  meters per second
km/h -  kilometers per hour
sm/h -  statute miles per hour
 

Time
h or hr(s) -  hour(s)
m or min(s) -  minute(s)
s or sec(s) -  second(s)
 

Power
W -  Watt
 

Energy
BTU -  British Thermal Units
 
 

 
By Luiz Roberto Monteiro de Oliveira
Screenshots and video captures allowed (personal, business or military) as long as credited to author and link to this site or URL included. Permission required for all other uses.