RE:ADS-B satellite receiverMy understanding...and I obviously can be corrected..
ADS-B...will tell them where you are.
AFIRS will tell them whats going on where you are.
Also...from theAireon website. At least two years out.
https://aireon.com/company/
"
In partnership with leading Air Navigation Service Providers (ANSPs) from around the world, like NAV CANADA, ENAV, the Irish Aviation Authority (IAA) and Naviair, as well as Iridium Communications, Aireon is set to revolutionize the global aviation industry. In 2018, Aireon will deploy a global satellite-based system capable of tracking and monitoring aircraft around the globe in real-time." https://www.trig-avionics.com/knowledge-bank/ads-b/introduction-to-ads-b/
https://flyht.com/discussion-on-ads-b-and-flyhts-afirs/
kirkland49