Estimation of the Standard Atmospheric Earth Model Parameters at 86 km Altitude

Hussein Omran Hussein; Waleed Ibrahim Yaseen

doi:10.24996/ijs.2023.64.7.42

Authors

Hussein Omran Hussein Department of Astronomy and Space, College of Science, University of Baghdad, Baghdad-Iraq
Waleed Ibrahim Yaseen Department of Astronomy and Space, College of Science, University of Baghdad, Baghdad-Iraq

DOI:

https://doi.org/10.24996/ijs.2023.64.7.42

Keywords:

Atmospheric Earth, Density, Pressure, Temperature, Gravity acceleration, Turbo C language

Abstract

Utilizing the Turbo C programming language, the atmospheric earth model is created from sea level to 86 km. This model has been used to determine atmospheric Earth parameters in this study. Analytical derivations of these parameters are made using the balancing forces theory and the hydrostatic equation. The effects of altitude on density, pressure, temperature, gravitational acceleration, sound speed, scale height, and molecular weight are examined. The mass of the atmosphere is equal to about 50% between sea level and 5.5 km. g is equal to 9.65 m/s² at 50 km altitude, which is 9% lower than 9.8 m/s² at sea level. However, at 86 km altitude, g is close to 9.51 m/s², which is close to 15% smaller than 9.8 m/s².

These results have been compared with an international standard atmosphere. The presumed atmosphere model differs significantly from the actual atmosphere because weather fluctuations are not taken into consideration in this model.