One minor correction, which I'd seen an indication of and had suspected from an architectural design point of view: the plane was getting pinged, it wasn't producing the pings. Per The Aviation Herald, which has lots of details today (and isn't behind a pay wall who's visits per month I used up yesterday): http://avherald.com/h?article=4710c69b&opt=0
"During the flight the ground station logged the transmitted and received pulse frequencies at each handshake."
That's in the middle of a huge paragraph describing how they did it in quite some detail, e.g. compared data to other 777s flying that day.
"During the flight the ground station logged the transmitted and received pulse frequencies at each handshake."
That's in the middle of a huge paragraph describing how they did it in quite some detail, e.g. compared data to other 777s flying that day.