Now these handshakes were obviously initiated by the aircraft; what conditions determine when it will seek to connect with the satellite?
Has that been established? The last time I looked at this thread last week I thought there was agreement that the satellite initiated the handshake.
As for the two minute intervals that looks
superficially like data corruption. 30, 60, 90, 120 seconds are standard intervals for wait times if the connection is not satisfactory. E.,g. Try the connection, if it doesn't work, wait 120 seconds, try again.