Looking at the response of the All State Vectors REST call:
openskynetwork.github.io/opensky-api/rest.html#response
I wonder what uniquely identifies each state vector? Is it the icao24 field + last_contact?
I want to store records in a database and I'm trying to understand what I can best as primary key.
Next to that the documentation mentions a "aircraft category" (field 17) but seems not to be included in the response. Is that expected?
M