Frequently Asked Questions

General questions

Q: Is OGN an open source project ?

A: OGN is a community project. Most parts (excluding the FLARM decoder) will be open sourced (although no decision has yet been taken on the license). The form of making OGN open source is now under discussion within our community.

Q: I want to join, what shall I do ?

A: Great! Although not absolutely required, we strongly recommend that you start by contacting us and requesting subscription to the OGN mailing list. That will give you access to all our knowledge-base, posts,etc.. We will also assist you with your receivers installations, software configuration etc..

You can contribute to the project in several ways:

  • First of all, you can set-up a new receiver at your location! Every new receiver improves the coverage of our system, making it closer to complete.
  • If you are skilled in programming you can help us improving our GUI applications, build new ones or improve the code of the OGN tracker.
  • You can share your ideas with us, propose new features you would like that OGN delivers and finally you can participate in their implementation and testing.

Q: Is OGN cooperating with other projects ?

A: Yes! OGN real-time data is forwarded to FR24 so that aircraft with FLARM (but without ADS-B) can also be seen there. Some of the colleagues from FR24 are also active members of the OGN project.

Q: I want to install a receiver, will the OGN community participate in the costs ?

A: We are a non profit community project and as such we don't have any common budget. What we all bring to the project is our free time, enthusiasm and sometimes also some w$. But reasonably. With the solution we propose building and installing wnew receiver is not expensive. Sometimes we organize collective orders (e.g. of antennas, pc boards, cables), which we announce through our mailing list, so that we can get the best price possible and share the costs of the shipment.

Q: I want to be able to edit this WIKI, what shall I do ?

A: See howto edit OGN wiki.

Configuration and Privacy

Q: I don't want to be displayed on OGN-compatible websites?

A: Please read this page to find out what needs to be done.

Q: My device is not recognized in system. I want it to be. What shall I do ?

A: If your FLARM's / OGN tracker's identifier is displayed with a leading "_" (underscore) it means the system did not find a record on you in the OGN devices database. If you want to be recognizable, please register yourself in the database.
For more details refer to the Opt In / Opt Out page.

Q: How can I find out what my FLARM-ID is ?

A: See this page for answer.

Q: I want to add my airfield to OGN FlightLog. How do I do that ?

A: You could either send your request at moc.spuorgelgoog|krowtenredilgnepo#moc.spuorgelgoog|krowtenredilgnepo or create a Pull Request for

Q: I want to move the receiver from A to B. How can I do that?

A: Just change the latitude and longitude (and altitude) in the configurations file (e.g. /home/ogn/rtlsdr-ogn.conf)

OGN Status

Q: All the stations on the list-of-receivers are red. Is the OGN down?

A: No. Sometimes the list-of-receivers has got a problem. But the "core of OGN" are the 4 redundant servers. You can check every server if it is running

Q: All (or most of) the stations on the range tool are red. Is the OGN down?

A: No. See the answer for list-of-receivers above.

Q: All (or most of) the stations on the site are red. Is the OGN down?

A: No. See the answer for list-of-receivers above.

Q: The weather is good, but I do not see any traffic on "website x" or "application y". What is going on with OGN?

A: The OGN is working very stable, see the answer for list-of-receivers above. As they are many alternative websites/applications you could have a look at them.

Build a receiver

Q: Is OGN receiver expensive ?

A: Short answer: No!. However, it really depends on the hardware you choose. And here you have a choice. The role of our community is to assist you in case of technical problems or if you have any questions. With a cheap mini pc board (e.g. Raspberry Pi) and a simple DVB-T-Stick 50€ EUR (all included). Maybe at the place where you want to install your receiver there already is a running PC with linux, which you might use ? Then it would even be cheaper, however we strongly recommend to invest in a small pc board, because it runs quietly, it is portable and does not consume much energy (and you want your receiver to be on 24/24 or at least 12/24).

Q: I want to install a receiver at my location, how to start ?

A: Please follow the ogn receiver installation instructions.

Q: Which pc-board should I choose for my receiver ?

A: Short answer: get a Raspberry Pi 3. The raspberry community is by far the biggest "mini pc" community, and the Raspberry Pi 3 is cheap and powerfull. Long answer: We've tested a few. They vary in terms of the performance and price. The main requirement is: your PC must run linux with USB support. It is recommended that it has at least 512Mb of RAM and you must have access to the Internet (although it is not required that you have a public IP address). If you choose the hardware we've tested already, you will have it run almost "out of the box". Therefore we recommend doing so. We have successful installations on Raspberry Pi v.B, Cubieboard2, ODROID U3 and other mini boards. Please have a look here for some specs and performance comparison of the tested boards.

Q: Which DVB-T dongle should I buy ?

A: DVB-T dongles

Q: Where do I get the latest receiver software from ?

A:Go to the downloads section

Q: How do I configure my receiver ?

A: That depends on the hardware you have and the installation method (image vs. manual installation). Follow the Software installation instructions.


Q: What does the data mean ?

A: See Decoding the data for a basic explanation of the telnet and server raw data.

Q: I want to subscribe to OGN tracking data to build my own app. How do I do that ?

A: Refer to subcribe to OGN data section.

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