A GNU Radio Mode S / ADS-B receiver: a flowgraph that demodulates 1090 MHz and decodes the Extended Squitter, with a live map output. The choice when you want the signal inside a GNU Radio flowgraph to see and modify each DSP block rather than a black-box decoder. Older codebase (last active ~2021), a learning/DSP receiver rather than a polished aggregator.
Upstream stopped in February 2021 on its gr3.9 branch, and Debian packages that snapshot (0.0.20210211-3.1 in trixie and sid) built against GNU Radio 3.10.12. Debian carries two small patches (library soname, NumPy float), not a GNU Radio port. Source · checked 2026-09-28