Hi,
If you are a user of the International Reference Ionosphere (IRI) and use the daily updated index files provided by the University of New Brunswick and the IRI Working Group (https://chain-new.chain-project.net/echaim_downloads/ig_rz.dat and https://chain-new.chain-project.net/echaim_downloads/apf107.dat) please be aware that a hardcoded limit in versions of the IRI from before December 2023 will result in the model crashing if used with the provided updated index files after October 31st. We encourage all users of the IRI to update to the latest version of the model to avoid interuption and to ensure continued use of the model after October 2024.
If you use an older version of the IRI, a truncated index file is provided here: https://chain-new.chain-project.net/echaim_downloads/capped/ig_rz.dat This file will not include dates after October 2024, as such older versions of the IRI will not crash with this file, but they will not be able to be used for dates beyond October 2024.
If you use an older version of IRI2020, IRI2016, or IRI2012 but cannot update to the latest version and still need to run for dates after October 2024, a stopgap fix can be enacted as follows:
In the read_ig_rz subroutine within your version of irifun.for, replace the real variable declaration with the following:
real aig(1600),arz(1600)
and in the tcon subroutine within your version of irifun.for, replace the real variable declaration with the following:
real ionoindx(1600),indrz(1600)
real ig(3),rz(3)
In versions of the IRI prior to December 2023, these variables are set to 806 elements which needs to be increased, here to 1600 elements. You should also implement a fix to the real(12,*) declarations in read_ig_rz subroutine within irifun.for with the following:
read(12,*) iupm,iupd,iupy
read(12,*) imst,iyst,imend,iyend
I do not guarantee that these changes will work for all older versions of the IRI and still recommend that all users update to the latest version, but if you recompile with these changes it should make it so that you can use those older versions of the model with the new index files.
If you use IRI2007, the ig_rz.dat file for that version is formatted differently and the new index files would not work regardless.
If you have any questions, please reach out to me or the IRI Working Group.
Cheers,
David Themens
We are looking for two Doctoral Researchers and one Postdoctoral Researcher to work in the Ionospheric Physics research group in the Space Physics and Astronomy Research Unit (https://www.oulu.fi/en/university/faculties-and-units/faculty-science/space…) at University of Oulu, Finland.
The two 3-year Doctoral researcher and one 4-year Postdoctoral researcher positions are open in the project “Polar upper atmosphere and space environment studied with the EISCAT3D radar and other cutting-edge instruments (POLAR)”. The project studies the effects of solar storms on the ionosphere-thermosphere system and the resulting phenomena such as Joule heating, atmospheric expansion and precipitating auroral particles. The project PI is Prof. Anita Aikio, and co-PIs are Dr. Heikki Vanhamäki and Dr. Ilkka Virtanen.
The application deadline is November 17, 2024. The full call text and application instructions are given in:
https://oulunyliopisto.varbi.com/what:job/jobID:764533/
Contact information: anita.aikio(a)oulu.fi
EISCAT Peer-Review Programme: Open Call for Applications
(sorry for any cross-posting)
The EISCAT Scientific Association invites applications for *observing
time on the EISCAT facilities in 2025*, by individual scientists,
research groups, and consortia*throughout the world on equal,
competitive basis*. This means that anyone can apply, independent of
whether or not the applicant is from an EISCAT associate country.
The present call is the first one for 2025. In total, *200 hours(*) of
experiment time* are open for international, peer-reviewed competition,
and are available for the use of any of the current EISCAT facilities.
Roughly half of this time is allocated in each call.
Please refer for more information and instructions how to apply to:
https://eiscat.se/scientist/schedule/eiscat-peer-reviewed-program/
The deadline for applications is *1 November 2024 at 24:00 UTC*.
*EISCAT Scientific Association is presently undergoing organisational
changes. The present programme is at the moment envisioned to continue
without changes but the programme itself or the usage/availability of
the awarded hours can be subject to change as a result of restructuring
of the organisation.
--
Maria Mihalikova, PhD
Staff Scientist, EISCAT
Bengt Hultqvists väg 1, 981 92 Kiruna, Sweden
Work phone: +46 (0)72 5813347
e-mail:maria.mihalikova@eiscat.se
