Originally Posted by
Ground Brick
Minimum SATCOM link bandwith is 16 kbps - all known ACARS data can be transmitted in 1 sec.
I believe ACARS via satellite uses 1-10kbps (approx) channels. High bit-rate channels don't make much sense for a system where you might have a few hundred aircraft sending a short message every few minutes... if you can't keep the channel full (e.g. 40-60% average load) then you're just wasting satellite bandwidth.
SATCOM modem also can take responsibility to repeat data, if not send propertly, so only 2:14z events data can be incompleted\not fully transmitted.
I suspect an incomplete message will be dropped at the ground station; the protocol will request retransmission a number of times if data gets lost between the aircraft and the ground, but eventually gives up.