Multi-protocol L-band satellite communications decoder for Windows.
Decodes Inmarsat Aero (Classic Aero, Aero-H/H+) and Inmarsat-C/EGC signals in real time using RTL-SDR, HackRF, or SDR++ server sources. Voice call recording, aircraft tracking, and message output in one application.
Windows Download: https://sarahsforge.dev/products/inmarscope
- Inmarsat Aero — 600/1200/8400 bps OQPSK signal decoding, voice AMBE decoding, ACARS/ADS-C/CPDLC message parsing
- Inmarsat-C / EGC — 1200 bps BPSK decoding with EGC SafetyNet/FleetNet message output
- Dual-SDR voice follow — dedicate a second RTL-SDR to automatically follow and record voice calls
- Voice call recording — WAV and OGG Vorbis output, tagged with aircraft ICAO
- Live spectrum & waterfall — real-time FFT with drag-to-place decoder placement
- Embedded flight map — tracks aircraft positions on globe.airplanes.live via Microsoft Edge WebView2
- SBS/BaseStation output — TCP server on port 30003 for virtual radar clients
- JAERO-compatible output — JSON dump, text log, and UDP forwarding
- Country blacklist — mute and skip recording for selected countries using ICAO address lookup
Requires MSYS2/MinGW-w64 with the following:
pacman -S mingw-w64-x86_64-{cmake,ninja,gcc,glfw,rtl-sdr,hackrf,zstd,ogg,vorbis}
Additional dependencies vendored in third_party/:
- Dear ImGui (docking branch)
- ImPlot
- jaero_dsp, mbelib, libacars, WebView2 SDK
Build:
mkdir build && cd build
cmake .. -G Ninja -DCMAKE_BUILD_TYPE=Release
ninja
See LICENSE.