I've contacted the Kyoto WDC a number of times since the outage began in 2018; unfortunately, they had a staffing change which interrupted their availability of the index. They still produce the provisional indices but have repeatedly refused to release them in a data format (only currently available as images...). At the moment the only alternative is the SuperMag index, which some studies have shown to be more representative anyway (http://supermag.jhuapl.edu/indices/, has a pretty straight forward tool to download the whole database at once, which is a nice feature). The only problem with the SuperMag index is that it is only updated once per year, so near-real-time is not an option. As Canada's representative to IAGA, I fully intend to bring up this problem at the next Congress. I built my model using AE index as a driver under the expectation that the index, which is endorsed by IAGA and has protected status, would be available in the long term. I have now been forced to re-build many components of my model with other geomagnetic indices as drivers because of this issue...

Dear Yury Yasyukavich,

I suggest you to see links and attached files on topic.

http://www.irimodel.org/docs/17-SW-IRI-bilitza.pdf

Article Ionospheric index MF2n for monthly median foF2 modeling and ...

Article A New Model for Total Electron Content based on Ionospheric ...

Article Approaches for modeling ionosphere irregularities based on t...

Article Effective Solar Indices for Ionospheric Modeling: A Review a...

Conference Paper Correlation between ionospheric models and space weather ind...

Best regards

International Service Geomagnetic indices

http://isgi.unistra.fr/index.php

Dear Dr. Calabia, http://isgi.unistra.fr/ also does not contain data on auroral electrojet indeces after 2018.

Dear Dr. Lafifi, I did not find an archive for AE index in suggested articles, while I do not want to use predicted AE for my problem because it will be prediction on prediction.

Dear Yury Yasyukevich,

I suggest you try this link

https://omniweb.gsfc.nasa.gov/. Sure you will get it there.

Dear Dr. Adekoya, omniweb also does not contain AE data after 2018.

You could use alternative versions to these indices, namely the SuperMAG geomagnetic indices:

http://supermag.jhuapl.edu

They are very similar to the IAGA indices, but more stations are used to compute the indices.

https://omniweb.gsfc.nasa.gov/form/dx1.html

Dear colleagues, when you post an answer please read the discussion and check suggested references. OMNIWEB does not contain AE indexes after 2018!

As I see I can use only SuperMAG data instead.

http://wdc.kugi.kyoto-u.ac.jp/ae_realtime/index.html

Dear Yury

AE Index data is available till the start of 2018. I don't know why thy have not updated after so long time. However, you have different alternatives. You can also calculate the AE by taking the magnetic data of observatories around auroral oval or you can also use polar cap indices which also describe energy input.

I've contacted the Kyoto WDC a number of times since the outage began in 2018; unfortunately, they had a staffing change which interrupted their availability of the index. They still produce the provisional indices but have repeatedly refused to release them in a data format (only currently available as images...). At the moment the only alternative is the SuperMag index, which some studies have shown to be more representative anyway (http://supermag.jhuapl.edu/indices/, has a pretty straight forward tool to download the whole database at once, which is a nice feature). The only problem with the SuperMag index is that it is only updated once per year, so near-real-time is not an option. As Canada's representative to IAGA, I fully intend to bring up this problem at the next Congress. I built my model using AE index as a driver under the expectation that the index, which is endorsed by IAGA and has protected status, would be available in the long term. I have now been forced to re-build many components of my model with other geomagnetic indices as drivers because of this issue...