poliastro.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/

Summary

Contents

poliastro.core.earth_atmosphere.jacchia.pi2
poliastro.core.earth_atmosphere.jacchia.wm0 = 28.96
poliastro.core.earth_atmosphere.jacchia.wmN2 = 28.0134
poliastro.core.earth_atmosphere.jacchia.wmO2 = 31.9988
poliastro.core.earth_atmosphere.jacchia.wmO = 15.9994
poliastro.core.earth_atmosphere.jacchia.wmAr = 39.948
poliastro.core.earth_atmosphere.jacchia.wmHe = 4.0026
poliastro.core.earth_atmosphere.jacchia.wmH = 1.0079
poliastro.core.earth_atmosphere.jacchia.qN2 = 0.7811
poliastro.core.earth_atmosphere.jacchia.qO2 = 0.20955
poliastro.core.earth_atmosphere.jacchia.qAr = 0.009343
poliastro.core.earth_atmosphere.jacchia.qHe = 5.242e-06
poliastro.core.earth_atmosphere.jacchia.R0 = 6356.766
poliastro.core.earth_atmosphere.jacchia.R = 8314.32