Originally Posted by
RatherBeFlying
FR24 is pretty much exclusively Earth Frame of Reference. Wind Frame is not given. Some ADS-B sequences show Vehicle Frame data such as TAS. Wind values can be computed by taking the differences between Earth and Vehicle Frame data, provided sufficient data is available.
The ADS-B spec allows airspeed as an alternative to groundspeed, but it's very rare to see that used.
Mode S EHS, on the other hand (not part of ADS-B) provides for airspeed (both TAS and IAS), as well as heading, and as you rightly say it's straightforward to calculate wind velocity from those.
For example I'm just looking at an Iberia A320 on the Heathrow ILS: heading 273°, track 270°, groundspeed 126 kts, TAS & IAS 146 kts