Seems to be university funded, they sell data commercially, it's also filtered. It's a small but growing network.
Nice stats, filtered data, receiver range reset issue not solved for a long time... "To feed or not to feed..." I'm not W. Shakespeare
Filtered, how do you know? They don't mention this and I haven't seen anything I would have expected to be there? The range issues in the profile are annoying though.
Polish government aircrafts 48D960, 48D961, 48D980 (2 x Gulfsream and B737BBJ, all ADSB) are not visible on opensky. Just an example.
I was dual feeding ADSBx and FA for a while but gave up FA when I realized I was deriving no benefit from it. At this point I won't feed any filtered sites like FA or OpenSky, which is basically all of them except ADSBx. I have the same libertarian objections to filtered sites as the owner of ADSBx has. I guess this sounds selfish but it's amazing how much of my home network bandwidth is consumed by just 1 feed. Feeding ADSBx benefits me so I will continue to feed it.
Just checked, because I thought I've seen one of those recently, and it's right there: goo.gl/zyMfw4 Of course that doesn't mean everything is, but I haven't really noticed anything.
At least some flights are not displayed. B737 is not even in OpenSky aircraft database. I don't blame OpenSky but ADSBx is simply the best source of really unfiltered data. I'm feeding OpenSky too because it cost me nothing. Everyone who is tracking flights should decide if this feed is worthy of using own bandwith. WKR Marcin
I think the aircraft DB is very beta, there's really a lot not in there in general, also very noisy. But if you find any flight that's definitely filtered, please post it, I'd be interested. I feel like it's mostly the missing coverage or that they don't use MLAT that makes it seem like it sometimes. But agreed on the bandwidth, that's for everyone to decide! On the topic itself, I personally like about OpenSky that they save all the data and a lot of people are doing research with it, I think that's great and some of the stuff done with it is super interesting, so it benefits me at least in an indirect way.
Once again: I don't blame OpenSky for missing flights. But look at ADSBx GlobalView (filter to see only military) and compare it with OpenSky. At least some of flights will not be available on Opensky. I don't know the reason but for me it looks like flights are filtered.
That's actually the same thing ADSBx is doing here. The only thing is we aren't funded by a bunch of universities.
I recently applied for access to their Impala shell (I'm at a university myself) and there is all Mode S data as well. It seems they really save every single message rather than just positions/tracks. I looked a bit deeper now and I haven't found a single case of filtering there. I'm asking because I'm of course interested in all sorts of data sets. For any research I want to publicise I would aggregate/anonymize it anyway, otherwise I could also get in trouble with our ethics boards.
I think so, too...they describe that part of the backend here: https://opensky-network.org/impala-guide But I think your dataset would be as useful to many researchers, might be a good target group for you!
I think we should stop this discussions. It slowly starts to be an advertisement of OpenSky. My conclusion: If anyone want to feed OpenSky, just start feeding. Here is link: https://opensky-network.org/join/become-a-feeder I'm about to close this thread because is really not related to ADSBx.
And this is the crux, who pays for the infrastructure to provide the data for free? Who pays the people to mange the infrastructure? I'm a volunteer, Dan is a volunteer, MDA is a volunteer, and everyone else who helps on the forum is a volunteer. A university has basically unlimited funds and unlimited resources, at least for the purposes of something like this. If we stored every message from the 1000+ feeds, we'd be bankrupted and closed in a month, just on the cost to store the data and rent the hardware at a data center. We store 1 second intervals so that's good enough. Researchers are a good target group yes, but that target group doesn't want to pay to support the project costs, as I've had many discussions with researchers in the past months. "We're a non-profit and can't afford to pay, but we'll gladly use all the ADSBx infrastructure for free and complain when things don't work like we paid for a 99.99% SLA" ADSBx has a very nice data set, thanks to all the feeders and the community. The organizations we've partnered with are doing good things with the data. We provide a ton of benefit that FA, FR24, et all, don't provide. Our data set is freely downloadable at 10GB compressed per day. We transfer 27 Petabytes a month, conservatively.
And that's extremely awesome! I truly believe any network that actually sticks around is a massive benefit to all interested communities (well, maybe not the people believing in the security theater of flight blocking...but fuck them). Yeah, I'm afraid researchers are similar to people working in media, they can give you "exposure" but not money...but I'll donate what I can.
After investigating - OpenSky does in-fact filter their data upon the request of the party not wanting to be tracked.
