Every now and again I've seen the ACARS claim pop up from P4T claiming UA175 received a message 20 minutes after it had hit the South Tower. It all seems to stem from this;
According to P4T, the time stamp at the top is the date/time the message was sent, and the time stamp at the bottom is the date/time where it was received by the aircraft, in this case, by UA175 at 1323 UTC (0923 ET).
So, trying to get my head around this, I have a couple of questions for anyone familiar with this system. First;
1. Does the last line indeed time stamp when the aircraft receives the message? Or is this a point that P4T are wrong on?
2. Do the transmitting stations automatically change based on the flight plan of the aircraft, or if not, how does ACARS determine which ground station to transmit from?
3. Was there any second track or flight plan UA175 put into the system, in the same way AAL11A was put in after its hijacking? Or did one automatically create when UA175 switched its transponder code?
Trying to get my head around it. I've read through past threads here, but they seem to be a mess.
Cheers.
According to P4T, the time stamp at the top is the date/time the message was sent, and the time stamp at the bottom is the date/time where it was received by the aircraft, in this case, by UA175 at 1323 UTC (0923 ET).
So, trying to get my head around this, I have a couple of questions for anyone familiar with this system. First;
1. Does the last line indeed time stamp when the aircraft receives the message? Or is this a point that P4T are wrong on?
2. Do the transmitting stations automatically change based on the flight plan of the aircraft, or if not, how does ACARS determine which ground station to transmit from?
3. Was there any second track or flight plan UA175 put into the system, in the same way AAL11A was put in after its hijacking? Or did one automatically create when UA175 switched its transponder code?
Trying to get my head around it. I've read through past threads here, but they seem to be a mess.
Cheers.
via JREF Forum http://forums.randi.org/showthread.php?t=266272&goto=newpost
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