Last Updated: 01/30/2023


Version: v2.0

NRLMSIS 2.0 is an empirical atmospheric model that extends from the ground to the exobase and describes the average observed behavior of temperature, 8 species densities, and mass density via a parametric analytic formulation. The model inputs are location, day of year, time of day, solar activity, and geomagnetic activity. NRLMSIS 2.0 is a major, reformulated upgrade of the previous version, NRLMSISE-00. The model now couples thermospheric species densities to the entire column, via an effective mass profile that transitions each species from the fully mixed region below ~70 km altitude to the diffusively separated region above ~200 km. Other changes include the extension of atomic oxygen down to 50 km and the use of geopotential height as the internal vertical coordinate.


The inputs for the model are: Year and day time of day geodetic altitude from 0 to 1,000 km geodetic latitude longitude local apparent solar time 81-day average of F10.7 solar flux daily F10.7 solar flux for previous day Daily magnetic index


Output of the model includes: Helium number density Oxygen(O) number density Oxygen (O2) number density Nitrogen (N) number density Nitrogen (N2) number density Argon number density H Hydrogen number density total mass density Anomalous oxygen number density Exospheric temperature temperature at altitude


  • Thermosphere

Space Weather Impacts

  • Atmosphere variability (satellite/debris drag)



Code Languages: Fortran


Publication Policy

In addition to any model-specific policy, please refer to the General Publication Policy.