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17 votes
2 answers
6k views

Why are Search & Rescue aircraft looking for the OceanGate Titan submarine not visible on ADS-B Exchange?

Currently, there is an ongoing Search and Rescue mission being conducted by Canada, the United States, and commercial operators to find and rescue the crew of the OceanGate Titan submersible vessel (...
Amazon Dies In Darkness's user avatar
1 vote
1 answer
29k views

Why do some military flight appear on Flightradar but some not?

I often see military flights in the sky, which do not appear on FlightRadar24. I do understand that low-flying military airplanes do no necessarily get picked up by these trackers, and that some ...
U_flow's user avatar
  • 5,044
0 votes
3 answers
1k views

How can I use an ADS-B receiver to make my aircraft visible in Flightradar24?

I recently bought a SENTRY ADS-B receiver for the aircraft in order to track the flight. How could I make Flightradar24 or Flightaware show my aircraft and how to register my aircraft on the website?
Baton's user avatar
  • 1
2 votes
1 answer
1k views

How to extract the interrogator ID from a DF11 message?

I've written a class which decodes raw Mode S messages. Whilst browsing the ICAO specs the other day I noticed that the Interrogator ID is sent back in the DF11 message. I thought that it would be a ...
Philip Lee's user avatar
5 votes
2 answers
2k views

Can ADS-B DF-17 messages with a non-zero remainder after CRC check be used?

For fun I've been using an AirSPy SDR (Software Defined Radio) to receive and decode ADS-B packets, primarily DF-11 and DF-17 messages. The code is written in C++ and works reasonably well. It ...
Max van Daalen's user avatar
3 votes
1 answer
365 views

Why there is no online radar coverage of Madagascar?

I noticed that no planes heading to FMMI are plotted on all the prominent online radars despite the fact that most of them are likely equipped with ADS-B. What does it take to remedy that lack of ...
menjaraz's user avatar
  • 2,435
7 votes
1 answer
832 views

Is this a glitchy ADS-B signal? [duplicate]

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different ...
KORD4me's user avatar
  • 1,779
31 votes
4 answers
13k views

Why do aircraft on FlightRadar24 jump around randomly sometimes?

I use FlightRadar24 on my iPad to track friends'/family's flights when they are traveling (not paranoia, just curious). I've noticed that, quite often, their plane will jump from one location to ...
Jae Carr's user avatar
  • 24.3k