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 coverage?

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    $\begingroup$ people with ads-b receivers living in madagascar and providing data to such online radars? $\endgroup$
    – Federico
    Commented Mar 26, 2014 at 18:16
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    $\begingroup$ possible duplicate of ATC real-time traffic services $\endgroup$ Commented Mar 27, 2014 at 13:07

1 Answer 1


For services like FlightRadar24 they typically get data in two ways: via volunteers hosting ADS-B receiver stations on the ground, and directly from the ATC radar system in places where that data is readily available.

For the ADS-B equipped aircraft these services would need volunteers in the area of Ivato Airport (FMMI) to host ADS-B receivers. They would almost certainly be happy to have more receivers, and they even offer free "premium" services (and occasionally free receivers) to people who help provide data. If it's legal in your area, and you are willing to run a receiver station you may want to look into it, and this will get you aircraft which are broadcasting ADS-B data (Mode S+ES with GPS position information).

For the aircraft which are not broadcasting ADS-B information (because they lack an appropriate transponder or GPS system) the problem is a little more complicated - the organization that runs ATC in Madagascar would need to set up radar sites (which presumably exist), and make that information publicly available (which may or may not be the case). A system would then need to be developed to allow the online radar services to process that data and make the flight tracks available (subject to whatever delays may be imposed in that process).

As I don't know much (anything really) about the ATC system in Madagascar, so I'm not sure how robust the radar infrastructure is or how open they might be with their data, so I can't really comment on that half of the system.

  • $\begingroup$ Ok. I'm afraid the ATC body is lagging behind here. Crowdsourcing is likely the way to go. I've overlooked the legal issue. Thanx for the indepth answer. $\endgroup$
    – menjaraz
    Commented Mar 26, 2014 at 18:33
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    $\begingroup$ @JanHudec: The legality of passively receiving radio signals is typically not concerned with the realities of physics. $\endgroup$ Commented Mar 26, 2014 at 20:09
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    $\begingroup$ @voretaq7: Yeah, the kind of law that hinders innocent activities while not really hurting the actual wrongdoers because the violation can't be detected if kept secret. $\endgroup$
    – Jan Hudec
    Commented Mar 26, 2014 at 20:26
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    $\begingroup$ @JanHudec There are many places where receivers are illegal... Or certain kind of receivers. For example in quite a few countries it's illegal to have airband receivers and radios capable of picking up police frequencies. In some it's a crime to have any receiver that can be tuned to different frequencies from those preprogrammed to receive government sanctioned broadcasts even... $\endgroup$
    – jwenting
    Commented Jun 16, 2014 at 12:31
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    $\begingroup$ @jwenting: True. I should have remembered it was forbidden to listen to Radio Free Europe around here too (and now it broadcasts from here to other countries where it is forbidden to listen to it). $\endgroup$
    – Jan Hudec
    Commented Jun 16, 2014 at 13:33

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