boinor.core.earth_atmosphere.jacchia

Low-level calculations for the Jacchia77 atmospheric model.

Given an exospheric temperature, Jacchia77 returns model atmospheric altitude profiles of temperature, the number densities of N2, O2, O, Ar, He, H, the sum thereof, and the molecular weight.

For altitudes of 90 km and above, we use the 1977 model of Jacchia [Ja77]. H-atom densities are returned as non-zero for altitudes of 150 km and above if the maximum altitude requested is 500 km or more.

References

Ja77 L. G. Jacchia, “Thermospheric Temperature, Density

and Composition: New Models,” SAO Special Report No. 375 (Smithsonian Institution Astrophysical Observatory, Cambridge, MA, March 15, 1977).

Fortran Implementation: https://ccmc.gsfc.nasa.gov/pub/modelweb/atmospheric/jacchia/jacchia-77/

Attributes

pi2
wm0
wmN2
wmO2
wmO
wmAr
wmHe
wmH
qN2
qO2
qAr
qHe
R0
R

Module Contents

boinor.core.earth_atmosphere.jacchia.pi2

boinor.core.earth_atmosphere.jacchia.wm0 = 28.96

boinor.core.earth_atmosphere.jacchia.wmN2 = 28.0134

boinor.core.earth_atmosphere.jacchia.wmO2 = 31.9988

boinor.core.earth_atmosphere.jacchia.wmO = 15.9994

boinor.core.earth_atmosphere.jacchia.wmAr = 39.948

boinor.core.earth_atmosphere.jacchia.wmHe = 4.0026

boinor.core.earth_atmosphere.jacchia.wmH = 1.0079

boinor.core.earth_atmosphere.jacchia.qN2 = 0.7811

boinor.core.earth_atmosphere.jacchia.qO2 = 0.20955

boinor.core.earth_atmosphere.jacchia.qAr = 0.009343

boinor.core.earth_atmosphere.jacchia.qHe = 5.242e-06

boinor.core.earth_atmosphere.jacchia.R0 = 6356.766

boinor.core.earth_atmosphere.jacchia.R = 8314.32