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IRI90 from Python, clean and flexible ionospheric model.

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IRI90: International reference ionosphere in Python

IRI-90 provides monthly mean values for magnetically quiet conditions at non-auroral latitudes in the altitude range 50km to 2000km.

However, IRI90 is often used as an initialization for conditions at auroral latitudes, understanding the caveats.

example IRI output


pip install iri90

or for the latest development version:

python -m pip install -e .


This IRI90 Python module is as small and clean as possible to enable your custom IRI90 applications.

import iri90

iono = iri90.runiri(dtime, altkm, latlon, f107, f107s, ap=p.ap)

iono is an xarray.DataArray indexable by species, altitude, etc. and includes metadata.

Altitude profile

density and temperature:



Optional: If you want to work with just the original Fortran code:

cd bin
cmake ../src
cmake --build .


Fortran Code

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