Enter the address of your FLARM, FANET, ADS-L, OGN tracker or phone app to see whether the Open Glider Network is hearing it right now, how well, and where it was heard last in the past 24 hours. The address is the six-character code the device transmits, such as DD1234; you find it in the device’s or the app’s settings. A registration or competition number works too, for devices registered as identified in the OGN device database.
After a check the address stays in this page’s link. Save the link on your phone’s home screen to check before take-off with one tap, and leave it with someone at home.
Devices in a random-address privacy mode (FLARM’s, and some apps’) change address every few seconds, so they cannot be checked here.
What this page shows, and what it keeps
Everything shown here is already public: the same positions appear on the OGN live maps, often with the whole track. The OGN data licence allows showing them for 24 hours, so nothing older is shown or kept here, even to the device’s owner. A device whose owner asked OGN not to track it appears nowhere, and one whose owner asked not to be identified appears without its model or registration. The page shows the last position and a summary, and no track; each answer is refreshed at most once a minute, and the number of checks from one connection is limited. The code is public.
How to read the signal figures
A ground receiver reports how strongly it heard each packet, in decibels above the noise. That figure falls quickly with distance and depends on the receiver’s antenna, so on its own it says little. The page compares your device with the other devices of the same system heard by the same receiver at about the same distance. Several decibels below them, repeatedly, usually means an antenna that is badly placed, shadowed by the body or the aircraft, or damaged. The frequency offset is compared the same way, against the receiver’s own average, since receivers drift too.