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/
Module 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¶