fftw3 (preferably multithreaded implementation - libfftw3f_threads).C compiler with C11 support (gcc, clang, AppleClang).Sensitivity and decoding accuracy needs improvement - the amount of CRC errors should be lower. Less important fields from MPDUs (slot sel, N1, N2, H, NF, U(R), UDR), LPDUs (DDR, P) and SPDUs (slock ack codes, priority) are currently skipped over without decoding. All ACARS applications and protocols supported by libacars library (full list here).HF Network Protocol Data Units (HFNPDU) in Direct Link Service mode:.Unnumbered data / Unnumbered acknowledged data.reliable network messaging via ZeroMQ - client and server mode.

file (with optional daily or hourly file rotation).Basestation feed with aircraft positions.Produces decoding statistics using Etsy StatsD protocol.Extracts aircraft position information from decoded messages and provides a data feed for external plane tracking apps (eg.aircraft data - from Basestation SQLite database.ground station details - from the system table file.

Enriches logged messages with data from external sources:.

Supports various outputs and output formats (see below).

Automatically reassembles multiblock ACARS messages and MIAM file transfers.

Interfaces directly with SDR hardware via SoapySDR library (no pipes / virtual audio cables needed).

Decodes multiple channels simultaneously, up to available CPU power and SDR bandwidth (no fixed channel count limit).

While many aircraft prefer satellite communications these days, HFDL is still operational and in use. over oceans or polar regions) where other ground-based communications services are out of range. Thanks to the ability of short waves to propagate over long distances, HFDL is particularly useful in remote areas (eg. It is used to carry ACARS and AOC messages as well as CPDLC (Controller-Pilot Data Link Communications) and ADS-C (Automatic Dependent Surveillance - Contract). HFDL (High Frequency Data Link) is a protocol used for radio communications between aircraft and a network of ground stations using high frequency (HF) radio waves. Dumphfdl is a multichannel HFDL (High Frequency Data Link) decoder.

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