Extract of the explanations in the PDF:
16:41 - Take-Off.Logged-On to Ground Earth Station (GES) 305/301, via the Indian Ocean Region (IOR) Inmarsat I-3 satellite
17:07 - Last Acknowledged Ground to Air DATA-2 ACARS Message. Link lost at sometime between here and 18:03:41.
18:03 - No Response to Ground to Air DATA-2 ACARS Data. Link lost at sometime between 17:07:48 and here.
18:04 - Last of five requests for Acknowledge to the Air DATA-2 ACARS Data at 18:03
18:05:11 - Data-2 Ground to Air transmission, automatic ACARS retransmission after expiry of 90 sec timer. Terminal is not responding.
18:25 - Log-On Request, initiated from the aircraft terminal. This is the end of the link lost period that began at sometime between 17:07:48 and 18:03:41.
18:39 - Ground Initiated to Air Telephony Call - Zero Duration (Not Answered)
19:41 - Handshake Request, with response
20:41 - Handshake Request, with response
21.41 - Handshake Request, with response
22:41 - Handshake Request, with response
23:13 - Ground Initiated to Air Telephony Call - Zero Duration (Not Answered)
00:10:58 - Handshake Request, with response
00:19:29 - Log-On Request (reported as a Partial Handshake), initiated from the aircraft terminal
00:19:37 - Note that the following R-Channel burst at 00:19:37.443 is the last transmission received from the aircraft terminal
01:15:56 - Handshake Request - No Response from Aircraft Terminal
01:16:06 - Handshake Request - No Response from Aircraft Terminal
01:16:15 - Handshake Request - No Response from Aircraft Terminal
- ACARS Messages are Ground to Air.
- link lost period that began at sometime between 17:07:48 and 18:03:41 due to electrical power issues?
- why no more Ground Initiated to Air Telephony Calls ?
Both Ground Initiated to Air Telephony Calls tried 1 minute before the caller gave up. Even though nobody picked up the phone, the terminal itself acknowledged it was there. Was it ringing in the a/c? Was the caller on the ground aware, that the terminal was still alive?