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00readme.txt
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International Reference Ionosphere 2012 (IRI2012) Software
----------------------------------------------------------
================================================================================
The IRI is a joined project of the Committee on Space Research (COSPAR) and the
International Union of Radio Science (URSI). IRI is an empirical model specifying
monthly averages of electron density, ion composition, electron temperature, and
ion temperature in the altitude range from 50 km to 1500 km.
This directory includes the FORTRAN program, coefficients, and indices files for
the latest version of the International Reference Ionosphere model: IRI2007. This
version includes several options for different parts and parameters. A logical
array JF(30) is used to set these options. The IRI-recommended set of options
can be found in the COMMENT section at the beginning of IRISUB.FOR. IRITEST.FOR
sets these options as the default.
The compilation/link command in Fortran 77 is:
f77 -o iri iritest.for irisub.for irifun.for iritec.for iridreg.for igrf.for
cira.for iriflip.for
================================================================================
IMPORTANT: Please note that the following files have NOT been changed and are the
same as for IRI2007: CCIR%%, URSI%%
================================================================================
Directory Contents:
-----------------------------------------------------------------------------------
00_iri2012.tar TAR file that includes all files from this directory. Was created
in UNIX using 'tar -cvf 00_iri2007.tar *'. UNIX command to unpack
is "tar -xvf 00_iri2007.tar".
irisub.for This file contains the main subroutine iri_sub. It computes
height profiles if IRI output parameters (Ne, Te, Ti, Ni, vi)
for specified date and location. Also included is the
subroutine iri_web that computes output parameters versus
latitude, longitude (geog. or geom.), year, day of year, hour
(LT or UT), and month. An example of how to call and use iri_web
is shown in iritest.for. Compilation of iritest.for requires
irisub.for, irifun.for, iritec.for, iridreg.for, igrf.for, and
cira.for.
irifun.for This file contains the subroutines and functions that are
required for running IRI.
iriflip.for Subroutines for the FLIP-related new model for the bottomside
ion composition of Richards et al.
iridreg.for Subroutines for the D region models of Friedrich-Torkar
and of Danilov et al.
iritec.for This file includes the subroutines for computing the ionospheric
electron content from 60km up to a specified upper limit.
cira.for This file includes the subroutines and functions for computing
the COSPAR International Reference Ionosphere (NRLMSIS-00)
neutral temperature and densities.
igrf.for This file includes the subroutines for the International
Geomagnetic Reference Field (IGRF).
dgrf%%%%.dat Definitive IGRF coefficients for the years 1945 to 2000 in steps
of 5 years (%%%%=1945, 1950, etc.)(ASCII).
igrf%%%%.dat Prelimenary IGRF coefficients for most recent year (ASCII).
igrf%%%%s.dat IGRF coefficients for extrapolating 5 years into the future (ASCII).
iritest.for Test program indicating how to use of the IRI subroutines.
Requires irisub, irifun, iritec, iridreg, igrf,and cira.
iriorbit.for Simple program for calculating IRI parameters along an orbit
iriorbitmax.for Program to calculate F2 peak parameters along an orbit.
ig_rz.dat This file(s) contains the solar and ionospheric indices (IG12, Rz12)
for the time period from Jan 1958 onward. The file is updated
quarterly. It is read by subroutine tcon in irifun.for (ASCII).
apf107.dat This file provides the 3-hour ap magnetic index and F10.7 daily
81-day and 365-day index from 1960 onward (ASCII).
CCIR%%.ASC, Coefficient files for the global representation of the F2 peak
URSI%%.ASC peak parameters (foF2, M3000) where %% = Month+10 (ASCII). CCIR is
the model recommended by the International Committee Consultative
on Radiocommunication (CCIR) of the International Union of
Telecommunication (ITU). URSI is the model recommended by the
International Union of Radio Science. IRI recommends the CCIR
model for the continents and the URSI model for the ocean areas.
If a single model is needed globally URSI is recommended.
-----------------------------------------------------------------------------------
-----------------------------------------------------------------------------------
NOTE: Please consult the 'listing of changes' in the comments section at the top
of each one of these programs for recent corrections and improvements.
More information about the IRI project can be found at http://IRI.gsfc.nasa.gov
IRI parameters can be calculated and plotted online at sites given on the homepage
----------------------------- dieter.bilitza-1@nasa.gov ------------------ Jan 2013