Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: Participating in MLAT?

  1. #1
    Passenger
    Join Date
    Mar 2018
    Posts
    48

    Participating in MLAT?

    I am right now participating in MLAT with my Pi install. However I know that Windows install doesn't have that capability.
    My question is... what's the benefit for us (feeders) in participating in MLAT? I don't see it improving the stats.

  2. #2
    Super Moderator
    Join Date
    May 2011
    Location
    T-NZCH1, PP:PH New Zealand
    Posts
    5,057
    Because it's got nothing to do with stats?

    Better accuracy on screen for non GPS transmitting aircraft being tracked. Plain and simple.
    Posts not to be taken as official support representation - Just a helpful uploader who tinkers

  3. #3
    Super Moderator
    Join Date
    May 2011
    Location
    T-NZCH1, PP:PH New Zealand
    Posts
    5,057
    Contributing to MLAT, is what allows this to happen

    MLAT
    In some regions with coverage from several FR24-receivers we also calculate positions of non-ADS-B equipped aircraft with the help of Multilateration (MLAT), by using a method known as Time Difference of Arrival (TDOA). By measuring the the time it takes to receive the signal from aircraft with an older ModeS-transponder, it's possible to calculate the position of these aircraft. Four FR24-receivers or more, receiving signals from the same aircraft, are needed to make MLAT work. MLAT coverage can only be achieved above about 3,000-10,000 feet as the probability that four or more receivers can receive the transponder signal increases with increased altitude.

    Most parts of Europe and North America are today covered with MLAT above about 3,000-10,000 feet. There is also some MLAT coverage in Mexico, Brazil, South Africa, India, China, Japan, Taiwan, Thailand, Malaysia, Indonesia, Australia and New Zealand. More areas will get MLAT coverage as we continue to add new receivers to our network.
    The only reflection on user stats, is mode-s only uploaded aircraft numbers.
    Posts not to be taken as official support representation - Just a helpful uploader who tinkers

  4. #4
    Passenger
    Join Date
    Mar 2018
    Posts
    48
    To clarify, I have asked what's the incentive for us (the feeders).

    Formula does not make a difference between number of planes.

    formula.png

    PS: "Insert Image" doesn't work in a reply, had to edit the post to attach it.
    Last edited by SoNic67; 2018-10-25 at 09:40.

  5. #5
    Super Moderator
    Join Date
    May 2011
    Location
    T-NZCH1, PP:PH New Zealand
    Posts
    5,057
    I'm not sure what you are asking. That forumula is for your local distance stats reflected on the stats page. As I've illuded to. Stats do not reflect MLAT. The web page does.

    It can't work out where MLAT aircraft are to include in feeder stats. MLAT on upload, simply adds the time to distance stamps needed for the SERVER to calculate positionless data. For everyones benefit.
    Posts not to be taken as official support representation - Just a helpful uploader who tinkers

  6. #6
    Captain Anmer's Avatar
    Join Date
    Apr 2010
    Posts
    1,384
    Quote Originally Posted by SoNic67 View Post
    To clarify, I have asked what's the incentive for us (the feeders).
    We get to track aircraft that don't have ADS-B. Or do you want to be paid?

    By the way, Insert Image does work in a reply. Here's the proof.

    09.jpg
    Mike


    www.radarspotting.com

    Radarspotting since 2005

  7. #7
    Passenger
    Join Date
    Mar 2018
    Posts
    48
    Who said anything about paying? You always jump to the worst conclusions.

    My point is that users are not incetivised to participate in MLAT, they can also see the MLAT planes because others participate . Some places have enough feeders and it won't matter, but in some more remote areas with limited data plans, even a small jump in stats might be enough incentive.

    Plus I think that the current system can be easily abused to get a radar to be on top of the stats, but that's a different issue and maybe a test that I will do on a different feed soon.
    Hint: look on the stat page https://www.flightradar24.com/share-statistics
    What's common for all the radars in the top positions? Max distance 349.
    Last edited by SoNic67; 2018-10-25 at 11:26.

  8. #8
    Captain Anmer's Avatar
    Join Date
    Apr 2010
    Posts
    1,384
    Quote Originally Posted by SoNic67 View Post
    Who said anything about paying? You always jump to the worst conclusions.
    I didn't jump to any conclusion. I asked a question. Now another one.

    What incentive are you expecting?

    Quote Originally Posted by SoNic67 View Post
    Some places have enough feeders and it won't matter
    Not necessarily. It's all about coverage from the ground upwards. The addition of a new feed in an otherwise densely covered area may provide additional MLAT tracking, especially at lower altitudes. And that's where most non-ADS-B aircraft can be found.
    Mike


    www.radarspotting.com

    Radarspotting since 2005

  9. #9
    Team FR24 Mike's Avatar
    Join Date
    Feb 2010
    Location
    Sweden
    Posts
    3,110
    With more feeders it's possible to get MLAT at lower altitudes. At 36,000 feet over Germany it doesn't make any difference, but at 1,000 feet near Gatwick, Nice or Detroit every extra feed extends the MLAT coverage.

  10. #10
    Super Moderator
    Join Date
    May 2011
    Location
    T-NZCH1, PP:PH New Zealand
    Posts
    5,057
    Next stop. Turning off the public ranking page along with the radar tag of contention.

    Cause apparently that's all that matters and the site is here for. Not tracking and plotting planes on a map or anything like that.

    Sent from my XT1092 using Tapatalk
    Posts not to be taken as official support representation - Just a helpful uploader who tinkers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •