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Comment by 4cao | Hacker News Reader

ADS-B Exchange works fine: https://globe.adsbexchange.com/?icao=ae503d

Edit: FR24 link for comparison: https://www.flightradar24.com/SPAR19/2ce4f83f

I like ADS-B Exchange and all for being a (purportedly unfiltered) data stream based off community volunteers uploading data from SDR stations (I even briefly ran a data source), but it's missing data for the middle of the flight.

Yeah, seems they don't have much coverage in Indonesia and the Philippines. I wonder if FR24 (which was showing the flight path correctly all along) depends on private uploaders there, or do they have other data sources to fill the gaps.

I think they have some satellite-based connection points, and those feeds understandably cost $, but maybe with cubesats we’ll fill in some gaps at an affordable price (possibly delayed).

Might also fill in with actual ATC radars (either interrogating in Mode S or listening to ads-b) or just national infra ads-b/multilateration output. These usually cost $$$.

Unless disabled, it'll also use extrapolated paths when a plane exits FR24's coverage area.

It's called "Estimations", and is in the Visibility tab of Settings. By default it will show up to 4 hours of estimated positions.

I can't say whether that's what was shown for this flight or not, as it won't show historical data for SPAR19.

I think in the past they sent out "free" receivers to areas with low coverage: https://www.flightradar24.com/blog/making-the-flightradar24-... while the other tracking sites tend to be enthusiasts with their own hardware only.

Yep, it doesn’t filter military flights (which has been interesting recently - toggle by clicking the “U” UI button)

I like to bring this up whenever FlightRadar24 is mentioned.

They heavily censor their feed. Not only for military aircraft, but they also have a service where you can pay to have your aircraft hidden by the system.

Personally my beef with them is that they started as a paid app, then transitioned to a subscription model and left everyone who bought the app hanging.

FR24 also uses a network of volunteer feeders. The difference is that FR24 uses that volunteer data and monetizes it. ADSB Exchange shares it back to the community.

Flightaware is also working https://flightaware.com/live/flight/SPAR19 brought to you by the TCL coding language.

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