The 'pings' were covered in today's (Sunday) press conference. 6 handshake signals provided by Inmarsat, data analysed by independent teams from the US and UK, both teams arrived at the same conclusion regarding the final ping location arcs which resulted in the diagram and associated information released yesterday.
I wonder why earlier pings don't deserve much attention. They could at least tell us whether it is the northern arc or the southern one which should be taken into consideration.