MEOSAR SAR SATELLITE SYSTEM
Galileo's SAR is Europe's contribution to the COSPAS-SARSAT network. By enhancing COSPAS-SARSAT system with the coverage capacity of the Galileo Middle Earth Orbit (MEO) satellite constellation equipped with SAR transponders, Europe is contributing to the effort for the reduction of the detection delay of a distress signal, transmitted by a radio beacon, from several hours, to 10 minutes. By the end of 2018, the system will be further enhanced by the addition of the "Return Link Service" (RLS), making the person in distress aware that the transmitted distress signal was well received and acknowledged by the SAR authority and that help is on the way.
https://www.youtube.com/watch?v=ZJ3SsPDUKZI
Information about GALILEO SAR Services
https://www.youtube.com/watch?v=FaI499irW2Y