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Country and Location of Receivers

6 years 3 weeks ago #424 by shalomblessing
Country and Location of Receivers was created by shalomblessing
Is there a way to search and find other OpenSky receivers close to you?

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6 years 1 week ago #427 by meides
Replied by meides on topic Country and Location of Receivers
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:

[{
    "id": 3,
    ...
    "position": {
        "longitude": 7.66531348,
        "latitude": 46.68106661,
        "altitude": 2234,
        "reasonable": true
    },
    ...
}, ...]
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5 years 10 months ago #466 by espin
Replied by espin on topic Country and Location of Receivers
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.
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5 years 10 months ago #469 by fuchs
Replied by fuchs on topic Country and Location of Receivers
The count is a coincidence, just like the ID of this topic is 466 :lol:

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

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5 years 10 months ago #470 by espin
Replied by espin on topic Country and Location of Receivers
yes but contrary to 466, 666 is The Number of the Beast :evil:

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5 years 10 months ago #471 by fuchs
Replied by fuchs on topic Country and Location of Receivers
Maybe that's the reason why we are facing so many technical problems today. Could someone please register another receiver!? :silly:

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5 years 10 months ago - 5 years 10 months ago #472 by schaefer
Replied by schaefer on topic Country and Location of Receivers
Video

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5 years 10 months ago #473 by labeeba
Replied by labeeba on topic Country and Location of Receivers
Thank you. There are 670 receiver positions, but OpenSky facts mentions that 875 are registered, why are the remaining receivers not displayed?

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5 years 10 months ago #474 by fuchs
Replied by fuchs on topic Country and Location of Receivers
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.

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5 years 10 months ago #476 by labeeba
Replied by labeeba on topic Country and Location of 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?

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5 years 10 months ago #477 by fuchs
Replied by fuchs on topic Country and Location of Receivers
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.

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5 years 10 months ago #478 by labeeba
Replied by labeeba on topic Country and Location of Receivers
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?

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5 years 10 months ago - 5 years 10 months ago #479 by fuchs
Replied by fuchs on topic Country and Location of 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 :)
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