Frequently Asked 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 or build new ones.
  • 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: I don't want to be displayed on OGN-compatible websites?

A: That's a shame… But we do offer the option to do so. Please read this page to know how.

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

A: Please follow the receiver installation instructions.

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 $. But reasonably. With the solution we propose building a new 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: Which pc-board should I choose for my receiver ?

A: 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 installation with Raspberry Pi v.B, Cubieboard2 and ODROID U3 mini boards. Please have a look here for some specs and performance comparison of the three boards mentioned. We are as well evaluating now boards based on RK3188 chip (popular and not expensive android hdmi tv dongles)

Raspberry PI with its 1 core CPU, GPU and 512MB of RAM is about the minimum what is required: weaker boards likely won't work. For new installations we strongly recommend buying multi-core processor boards (e.g. Odroid U3, RK3188, Olimex A20-OLinuXino-LIME, Banana Pi, etc…) rather than Raspberry Pi. They simply offer far more performance for just a little bit more $. See our cpu-boards comparison to have a better overview.

Q: Which DVB-T dongle should I buy ?

A: DVB-T dongles

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. r.pi) and home-made antenna you should be able to build your receiver with around 50-60 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). One of the cheapest (from the ones we've tested and is currently the most frequently used mini pc boards for OGN stations) is Raspberry Pi v.B. However, currently some of the mini boards available on the market offer much more powerful spec., for just a little bit more money. The best example from the ones we've tested is ODROID U3).

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

A:Go to the downloads section

Q: How do I configure my receiver ?

A: Follow the Installation instructions. There's a section on receiver's configuration file.

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

A: See howto edit OGN wiki.

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

A: Refer to subcribe to OGN data section.

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.

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