Originally Posted by
DaveReidUK
Neither. It's a reference to ADS-B data captured by the Aireon satellite network.
The amount of information broadcast continually by ADS-B Extended Squitter is significant aircraft state, vertical and turn rates, FMC settings lots of information. In a relatively sparse area the discrimination of one aircraft's broadcasts would be relatively simple by Aireon (a hosted payload on Iridium Next satellites)