Modez

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Contents

Summary

The full write-up with screenshots, experimental results, comparisons to other hardware, overseas tests, etc, can be found on the main page.

Decoder

  • Scope of Mode S short frame with (red) binary decode overlaid:

  • Drawing on Eric Cottrell's original decoder, this is the Modez-enhanced scope view with preamble, reference level and data-start/end markers:

  • Evolution of the decoder showing improved noise floor:

Raw Samples

  • 4MHz chunk visualised in GNU Radio (notice the nearby GSM channel intermod on the right-hand side):

  • 8MHz chunk visualised in Baudline:

Inspiration

  • Accessing SFO RADAR using the magic code-breaking box in the classic film Sneakers:

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