ICAO SELCAL Extension

hfaero

Hi Everyone,

I'm a regular guy with next to no programming skills and have recently bought a KiwiSDR that I use with my new Raspberry Pi 4 in a Chromium browser. Prior to this I used a Ubuntu Linux laptop that I have now re-purposed as the household laptop no longer dedicated to my HF listening habits.

As an avid HF listener of aeronautical transmissions I have relied upon third party apps to help me decode ICAO SELCAL tones (https://www.sigidwiki.com/wiki/ICAO_Selcal) and with the Ubuntu system I could do this with a Windows program (MultiPSK) running under Wine. However, Wine is no longer available via Exagear for ARM architectured systems so I have no means to decode SELCAL tones as there are no Linux based decoders on the market. As an interim, I can freeze the waterfall and make rough calculations of each tone but that is a little bit time consuming plus I have to zoom in to WF10 and so miss other transmissions of interest.

So I have a wish to create, or more appropriately, to have an extension created, to display the SELCAL tones very much like they do at the moment in the attached file selcal.png and within the extension a corresponding scale representing the sixteen (16) codes similar to the very rough diagram in the attached text document selcal.txt. The frequency of each tone does not need to be displayed within the extension view but is there more for explanation purposes.

I have no real knowledge whether this can be achieved but I do know that with the super cool accuracy of the KiwiSDR that a visual representation of an AF window overlayed with the codes at their appropriate frequencies should help me and others immensely.

Anyway, that's my wish list item and I'd be more than happy to assist anyone who might be interested in getting an extension built for this.

Thanks,
Mike (nzsdr.ddns.net:8073)

Attachments:
https://forum.kiwisdr.com/uploads/Uploader/c9/a3953f835d3fd3084702771fae7e0a.png
https://forum.kiwisdr.com/uploads/Uploader/38/be8b618c791c17e5f4d53106248b47.txt
https://forum.kiwisdr.com/uploads/Uploader/fa/19e3c41fd7a7fb9a17a938894e1dee.png

benson

Since you are familiar with Linux you could have a look at "selcald" which is an Arinc-714A decoder.

ref 1: https://github.com/westphae/selcald
ref 2: https://bitbucket.org/techn0mad/selcald/src/master/

best regards, Ben

hfaero

Thanks Ben, while familiar with Linux the python code in SELCALD is just gobbledegook to me and each of those .py files fail immediately with no obvious solution for me. I think this code needs to be embedded in other applications such as FFT, audio and other sound stuff, well beyond my understanding.