Open-Weather: A Browser Based NOAA APT Satellite Image Decoder

Thank you to Sasha Engelmann for letting us know about the release of the Open-Weather community's web browser based NOAA APT decoder. The decoder allows for easy NOAA satellite decoding by allowing you to upload a wav file recording of a NOAA satellite pass, and it will decode it into an image within the browser. 

The project emerged from a desire to understand the process of decoding APT audio recordings into NOAA satellite images, and a need for an accessible browser-based decoder for new practitioners during open-weather DIY Satellite Ground Station workshops.

While we were inspired by Thatcher's APT 3000, we felt accessibility, documentation and features could be expanded and improved. open-weather apt allows you to select an audio file on your computer, choose a demodulation method, add histogram equalisation and download images. The website does not store your personal data, including your location or any files you upload.

Documentation of the decoder is available on Public Lab here: https://publiclab.org/notes/sashae/05-03-2022/an-accessible-browser-based-decoder-for-noaa-images

open-weather apt is forked from Thatcher's APT 3000. It is a collaboration between open-weather, Bill Liles NQ6Z and Grayson Earle.
Open-weather web based APT decoder

2 comments

    • Sasha

      Hi Satnogs Enthusiast! Sorry for the delay in replying. We are working on greater interoperability with file types (including .ogg) and sample rates for the future, but for now you could try exporting your ogg. files to WAV, and resampling to 11025 samples/ sec, using Audacity or a similar programme. That should enable you to upload your files to open-weather apt and try it out.

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