I have not had a chance yet to verify the information in the link I am about to provide (hope to do that later) but here is some info regarding the capability of the Aireon system vs ground based ADS-B receivers.
Strangely enough it is post made by in another thread that you started back in October 2015 regarding Aireon.
http://www.pprune.org/pacific-genera...ml#post9140748