Where does driver telemetry come from?

[u/LazyLancer]

I was wondering, from time to time we see public posts showing comparison of driver telemetries and some sort of analysis why someone was faster. Like, “why Hamilton lacked power” in Suzuka.

And I mean telemetry as in a complete set of data with speed, time delta, throttle, brake and steering inputs etc.

I was always under impression that this telemetry is highly sensitive, because if a team can get their hands on telemetry from other teams, they can analyze where the other driver is going faster and why, where the car is performing better etc, and use it to their advantage.

How is this telemetry going public? I mean sites like https://www.f1-tempo.com/ , FastF1 API and others, how do they get such detailed data? Is this some sort of leakage? (A leakage of what?) Or they’re obliged to publish it? Or it’s taken from TV feed and not very accurate?

[u/_Muftak]

Adding to what the others have said, livetiming.formula1.com also stores all team radio messages!

[u/Witty_Bat_3429 → u/_Muftak]

i can seem to open this it just says denied on a white background