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different distance flightradar24 <-> flightaware

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  • different distance flightradar24 <-> flightaware

    Hi I have a question, here on the Flightradar24 side I have now a distance 112mi. But I also feed to flightaware - distance of 5-6 Views 150-200 mi. Why the difference? Can anyone explain to me?

    stats here: de.flightaware.com/adsb/stats/user/antonov124
    flightradar24 stats:
    Uptime (as % of available time): 100%
    Aircraft seen: 823
    Positions reported: 33,421
    Maximum distance: 112nm

    Here my dump1090 max range: 262,km -> 141nm


    FR24 Link: Connected via UDP
    FR24 Radar Code: T-EDDC51
    Aircraft Tracked (ModeS & ADS-B): 35
    Aircraft Uploaded: 20
    Receiver: avr-tcp, Connected
    MLAT running: YES

    greetings Rainer
    Last edited by antonov_124; 2016-02-24, 12:11.
    T-EDDC51
    Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

  • #2
    Flightradar24 shows distance in nm so I think you made a small mistake there with 112mi.

    Also some data could get filtered out during early signal processing stage, especially for dvb-t sticks. So it is possible for some data to get filtered out.
    --

    Comment


    • #3
      Originally posted by Khan View Post
      Flightradar24 shows distance in nm so I think you made a small mistake there with 112mi.

      Also some data could get filtered out during early signal processing stage, especially for dvb-t sticks. So it is possible for some data to get filtered out.

      Ah ok , thx for this info
      T-EDDC51
      Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

      Comment


      • #4
        Originally posted by antonov_124 View Post
        Ah ok , thx for this info
        You're welcome
        --

        Comment


        • #5
          Originally posted by Khan View Post
          You're welcome

          Maximum distance: 111nm
          Status: Online
          Current upload rate: 0 KB/s
          First seen online: 2015-11-11 17:03:54
          All dates and times are UTC

          111nm ;/
          T-EDDC51
          Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

          Comment


          • #6
            Good Range, if you keep in mind that Dresden is the "Tal der Ahnungslosen"

            Rainer, what is your Installation ? In which height is your antenna installed ? Is it the one which is supplied with your DVB-T Stick (and which one is it?) ?

            I bought this nice antenna, http://www.ebay.de/itm/291634505173?...%3AMEBIDX%3AIT

            At the moment I have ~160nm (mostly direction "goldener" west(en) due to buildings).

            Gruß
            Regards,
            T-EDDE7

            Debian 8 Server | jetvision ADS-B USB Dongle | ADS-B Collinear Antenna
            Banana Pi | Mystique SDR R820T2 | stock Antenna

            Comment


            • #7
              Originally posted by equi View Post
              Good Range, if you keep in mind that Dresden is the "Tal der Ahnungslosen"

              Rainer, what is your Installation ? In which height is your antenna installed ? Is it the one which is supplied with your DVB-T Stick (and which one is it?) ?

              I bought this nice antenna,

              At the moment I have ~160nm (mostly direction "goldener" west(en) due to buildings).

              Gruß
              First german:
              eh werd nicht frech ^^

              1 Etage Antenne ist so ähnlich wie die in deinem link nur kürzer auf Fensterbank, links einstellen darf ich noch nicht hier ;( Dach geht leider nicht.
              PS hab mal deine Signatur geklaut ^^


              English:
              some friendly greetings to equi ^^

              my antenna is an 5/8 Slovakien adsb antenna : ebay: 291675696702
              http://www.bilder-upload.eu/show.php...1456341625.jpg
              the antenna is in the 1 floor above the street on the window sill
              view direction street up north and street down south.

              greetings Rainer
              Last edited by antonov_124; 2016-02-24, 18:59. Reason: ;o)
              T-EDDC51
              Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

              Comment


              • #8
                Hm, so maybe 4-5m above the street ? Maybe you won't get more, esp. here @ FR24. I noticed that "issue" too when I started feeding back in July 2014. With some old builds (the pre-deb builds) I had with the supplied DVB-T Antenna ~120-130nm, after they cutted the old builds I had to upgrade to a new one. In this build (I don't remember which version it was) my range dropped to 70 or 80nm which annoyed me :/ Do you receive EDDC ground Traffice ? Sometimes it lacks and you only see aircrafts already airborne.

                Maybe you can install the Antenna on the roof of your house (depends if its your own or if you rented it). If you can install it on the roof, I would suggest an amp for you
                Regards,
                T-EDDE7

                Debian 8 Server | jetvision ADS-B USB Dongle | ADS-B Collinear Antenna
                Banana Pi | Mystique SDR R820T2 | stock Antenna

                Comment


                • #9
                  No ground traffic. because the airport is situated above the valley
                  an Amp? mhh mayby

                  no not my house no chance to go to the roof
                  my dump0190 output says 264km reichweite von daher
                  ups mixed language ^^
                  T-EDDC51
                  Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

                  Comment


                  • #10
                    Originally posted by Khan View Post

                    Also some data could get filtered out during early signal processing stage, especially for dvb-t sticks. So it is possible for some data to get filtered out.
                    Incomplete data is rejected by FR24 as Khan said. Your antenna is not in good position and i think that is why you get that range on FR24
                    For official support use Contact Form

                    Comment


                    • #11
                      I know, I visited Dresden when F-HPJB departed Dresden (scroll a bit down https://www.flickr.com/photos/78265740@N07/)


                      And what is your range in FA ? The statics page doesn't work for me some reason (no range statics are displayed :/ )
                      Regards,
                      T-EDDE7

                      Debian 8 Server | jetvision ADS-B USB Dongle | ADS-B Collinear Antenna
                      Banana Pi | Mystique SDR R820T2 | stock Antenna

                      Comment


                      • #12
                        Originally posted by equi View Post
                        I know, I visited Dresden when F-HPJB departed Dresden (scroll a bit down https://www.flickr.com/photos/78265740@N07/)


                        And what is your range in FA ? The statics page doesn't work for me some reason (no range statics are displayed :/ )

                        http://de.flightaware.com/adsb/stats/user/antonov124





                        dump1090-localhost-range_metric-24h.png
                        range.JPG
                        Last edited by antonov_124; 2016-02-24, 21:26. Reason: picture
                        T-EDDC51
                        Radarcape ( 171213.1000.02D) | 1090MHz ADS-B Filtered Preamp | LNA4ALL | ADS-B Collinear 5/8 Antenna

                        Comment


                        • #13
                          Hi,
                          Your dump1090 can receive Mode-S signal up to 238Km far from your antenna. However, fr24feed reject data from your received signal.
                          I guess it becomes reason of data accuracy for FR24. FR24feed should reject non-continuous position data like as one shot position data from far end of receiver range.
                          Based on my estimation, to accept position report data by FR24, position data is required to continues 20 seconds of duration average.
                          one-shot or few times of position data set for one-aircraft should rejected by fr24feed or fr24 server center.

                          Comment


                          • #14
                            Not sure what you did, but http://jollain.com/FR24/stats.php currently shows your range at 180 max and 55 average nautical miles.

                            You're current rank is #7 out of 28 active feeders with the same airport ID, so it looks like you're doing really well. The only thing with all those feeders installed, I would recommend to update your Pi to the latest FR24 Pi beta to make sure you're not leaking MLAT data from other feeds to FR24.
                            Attached Files

                            Comment


                            • #15
                              Originally posted by antonov_124 View Post
                              ......


                              FR24 Link: Connected via UDP
                              FR24 Radar Code: T-EDDC51
                              ......
                              Receiver: avr-tcp, Connected
                              MLAT running: YES

                              greetings Rainer
                              What does "MLAT running" mean and where did you get that stat?
                              I don't see that on any of my FR24 stats.

                              Comment

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