Home › Sources
Sources and freshness
This site doesn't make up its data, it collects it. Here you'll find, for every dataset, where it comes from, under which terms it may be used and when it was last fetched. If it isn't listed here, it isn't used.
loading
Third-party code
Anything we didn't write ourselves sits on our own server and loads from there, so your browser never contacts third-party addresses.
| Component | Licence |
|---|
How we handle other people's data
We only take in what we're allowed to use. Where attribution is a condition, it appears in the footer of every page and here in the table. Where a source doesn't allow its texts to be passed on, we take only the bare fact (an event takes place, a repeater exists) and link to the source for the rest.
We fetch as rarely as possible. Anyone feeding a collection from other people's servers is a guest: event dates are fetched twice a day, satellite orbital data likewise, the elevation model once a quarter. Propagation data is the only exception, it goes stale within minutes.
If a source goes down, the last data stays in place rather than emptying a list. That's why the “Updated” column matters: it tells you how old what you're looking at is.
The same data is available through the API. If you reuse it, pass the attribution on, to the original source and to us. Nobody has to look that up: every response carries the required attribution itself, in the JSON under quellenangabe and as the header X-Quellen. What that looks like is in the API documentation; /api/v1/quellen returns this table as JSON.