U.S. Standard Atmosphere - 1962 Version

1962 Version

The basic assumptions made for the 1962 version were:

• air is a clean, dry, perfect gas mixture (cp/cv = 1.40)
• molecular weight to 90 km of 28.9644 (C-12 scale)
• principal sea-level constituents are assumed to be:
  • N₂–78.084%
  • O₂–20.9476%
  • Ar–0.934%
  • CO₂–0.0314%
  • Ne–0.001818%
  • He–0.000524%
  • CH₄–0.0002%.

• assigned mean conditions at sea level are as follows :
  • P = 101325 Pa = 0.1013250 MN/m2 = 2116.22 psf = 14.696 psi = 29.92 In/Hg
  • T = 288.15 K = 15 °C = 59 °F
  • ρ = 1.225 0 kg/m3 = 0.0764734 lbm/ft3
  • g = 9.80665 m/s2 = 32.174 1 ft/s2
  • R = 8.31432 J/mol-K = 1545.31 ft lb/lbmol-°R.