Country and Location of Receivers

Is there a way to search and find other OpenSky receivers close to you?

A search like that does not exist. However, you do have access to all non-anonymous receiver profiles. You can access them by clicking the serial numbers on the toplist page . The profiles each include the location of the receiver.

Since manually opening the profiles of approximately 400 receivers is probably not an option, you could also take a look at the JSON response for a GET request to opensky-network.org/api/sensorDonation/list:

If you look at the HTTP response of opensky-network.org/api/sensor/list you get a JSON with 666 (is this a deliberately chosen magic number?!!) entries.
Some are anonymized (position or identity or both)

Interesting.

The count is a coincidence, just like the ID of this topic is 466

The result of /sensor/list is a list of registered receivers where sensitive information has been obfuscated.

yes but contrary to 466, 666 is The Number of the Beast

Maybe that's the reason why we are facing so many technical problems today. Could someone please register another receiver!?

Video

Thank you. There are 670 receiver positions, but OpenSky facts mentions that 875 are registered, why are the remaining receivers not displayed?

Feeders can choose to "anonymize" their sensors (checkbox at the bottom of the receiver registration form). This has the following implications:

• The receiver profile won't be visible for other users (and cannot be shared)
• If we hand out raw data to researches, their receiver position will be removed beforehand

Thus, anonymized receivers will not be visible in the response of /sensor/list. The facts page gives you the count of all registered receivers.

Alright, thank you! Also, what is the difference between active and online? If a receiver is active: true and online: false, does it mean the receiver is part of the network but is not currently collecting messages?

That's correct!

• active: receiver is allowed to ingest data (mostly for internal use)
• online: receiver is sending messages to OpenSky

The "active" flag should be "true" for 99% of the receivers. It originates from the early days of OpenSky and is used for internal testing. You can safely ignore this flag.

Alright, in that case /sensor/list provides 346 online receivers but according to the facts there are only 163 (446-283) online non-anonymous receivers?

To add more confusion: anonymized != anonymous

• Online Anonymous Receivers: as on facts page belong to people who have activated our feeder, but did not claim their device, i.e., they have not registered the receiver with our form . The receiver is not associated with an OpenSky account.
• Online Registered Receivers: as on facts page have activated our feeder and associated the device with an OpenSky account. This number also includes anonymized receivers as discussed before

Thus: "Online Registered Receivers" - "Online receivers from /sensor/list" = "Number of online anonymized receivers", or in your example: 446 - 346 = 110

The /sensor/list endpoint is not publicly documented, which is the reason why we didn't care for proper naming to avoid confusion like this