In-Flight Telemetry

Is it technically feasible for a flight data acquisition unit parametric feed, normally directed to the crash-survivable digital flight data recorder, to be also transmitted in real time?

ACARS needs to embrace modern data links using IP

If only ACARS could look beyond VHF and L-Band

Inmarsat Satellite Communications (1994)

Four years after the first satcom on 747-400,  here is a snapshot of the technology, the interfaces, and the applications.