IRI2016 ionosphere model from Python and Matlab

Python and Matlab interfaces to the International Reference Ionosphere (IRI) 2016 model.

Python

1. Install IRI2016 command-line driver program

   pip install -e .[tests]
   

2. run selftest to ensure install was completed:

   pytest
   

3. try example script e.g. AltitudeProfile.py

Matlab

1. compile Fortran code via matlab/setup_iri2016.m
2. drive the simulation via a seamless command line interface, example: matlab/RunIRI2016.m

Compiler

Any Fortran compiler will do. IRI2016 has been tested with compilers including:

• Gfortran 4.8, 5, 6, 7, 8
• Intel ifort
• PGI pgf90
• Flang flang

If you don't already have a Fortran compiler, install Gfortran by:

• Linux: apt install gfortran
• Mac: brew install gcc
• Windows

Usage

• Height-profile: plot density and temperatures vs altitude
• Latitudinal profile: plot densities and height at the peak of F2, F2, and E regions vs geographic latitude
• GMT profile: plot densities and height at the peak of F2, F2, and E regions vs universal time
• Height vs GMT: plot Ne, Te, and Ti as a function of height and universal time
• Latitude vs Longitude: plot of foF2 a function of geographic latitude and longitude

Matlab / GNU Octave

IRI2016 is readily accessible from Matlab and GNU Octave.

1. From Matlab, verify everything is working by from the iri2016/ directory:

   runtests('tests')
   

2. Use iri2016.m function to access IRI2016 quantities. See RunIRI2016.m for simple example use / plots.

Data files

iri2016/iri2016/data/index/{apf107,ig_rz}.dat are regularly updated. Currently we don't auto-update those.

Direct compilation

These commands are not normally needed unless you want to work with the Fortran code more directly.

Fortran compile

cd bin
cmake ../src

cmake --build .

ctest -V

Notes

• 2016 presentation