alphafox02

alphafox02 / inmarsat-sniffer

Public

Standalone Inmarsat L-band decoder — STD-C EGC + Aero ACARS/ADS-C/CPDLC from a single SDR

10
3
100% credibility
Found Apr 18, 2026 at 10 stars -- GitGems finds repos before they trend. Get early access to the next one.
Sign Up Free
AI Analysis
C
AI Summary

Standalone decoder that captures and displays Inmarsat satellite messages for aviation and maritime safety from common radio receivers.

How It Works

1
🔍 Discover satellite radio magic

You stumble upon inmarsat-sniffer, a tool that turns your radio receiver into a window into global satellite chatter from ships and planes.

2
📡 Set up your receiver

Connect your antenna to a satellite in the sky and pick one like the Americas bird to listen in.

3
🚀 Start listening

Run the program with your receiver—it automatically tunes to the right spots and begins pulling in messages.

4
🗺️ Watch planes and ships appear

Open the built-in map dashboard to see live positions of aircraft crossing oceans and safety alerts from vessels worldwide.

5
📊 Share your discoveries

Export messages to maps, feeds, or apps to track flights and maritime news in real-time.

✨ Tune into the world

Sit back as hidden satellite conversations light up your screen, revealing positions and alerts from the skies and seas.

Sign up to see the full architecture

4 more

Sign Up Free

Star Growth

See how this repo grew from 10 to 10 stars Sign Up Free
Repurpose This Repo

Repurpose is a Pro feature

Generate ready-to-use prompts for X threads, LinkedIn posts, blog posts, YouTube scripts, and more -- with full repo context baked in.

Unlock Repurpose
AI-Generated Review

What is inmarsat-sniffer?

This standalone C decoder sniffs Inmarsat L-band signals from a single SDR, pulling maritime STD-C EGC safety messages like NAVAREA warnings alongside aviation Aero ACARS/ADS-C/CPDLC data. No GNU Radio, Python, or Java runtime needed—just one binary that handles HackRF, RTL-SDR, BladeRF, USRP, SDRplay, or any SoapySDR device. Outputs hit JSON feeds, SBS/BaseStation for tar1090/VRS, MQTT topics, or a real-time web dashboard with aircraft maps.

Why is it gaining traction?

It stands out as a pure standalone github tool decoding multiple protocols simultaneously from wideband capture, skipping bloated SDR stacks. RTL-SDR users get aero-only mode at 2.4 MHz BW, while wider rigs unlock full EGC + Aero. SBS and JSON outputs integrate directly with flight trackers, and ZMQ audio pipes to JAERO for verification.

Who should use this?

SDR hobbyists tracking oceanic aircraft via ACARS/ADS-C/CPDLC without dish farms. Maritime radio enthusiasts monitoring EGC distress alerts. Flight data aggregators feeding tar1090 or VRS from L-band satcom.

Verdict

Grab it if you're prototyping Inmarsat L-band sniffing—flexible SDR support and clean outputs make evaluation easy. 10 stars and 1.0% credibility score signal early maturity; strong README compensates, but run live tests for edge cases like sparse OQPSK traffic.

(198 words)

Sign up to read the full AI review Sign Up Free

Similar repos coming soon.