Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 5-27
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
logged onto the Ground Datalink Gateway (GDGW), e.g. the SDU has received the logon
response message from the GDGW.
(3) When attempting a Network Logon, the ACD does the following:
(a) Registers on to the network
(b) PSCS Attach.
(4) When attempting a Safety Logon, the ACD does the following:
(a) Sets up a safety background PDP context
(b) Logs on to the ground data gateway (GDGW).
B. Satellite Selection
(1) When the ORTselects Manual-logon, the ACD awaits pilot's logon command before
commanding the Channel Card to attempt a Network Logon.
(2) When the pilot selects Manual-logon, the ACD attempts a Network Logon using the pilot
selected satellite link.
(3) Automatic satellite selection occurs under either of the following conditions:
(a) The pilot has selected Auto-logon.
(b) The ORT selects Auto-logon and no manual override (e.g. logoff) has occurred.
(4) When automatic satellite selection is active, the ACD selects from valid available satellite
links based on the following ordered preference criteria:
(a) Priority of Satellite Link from the ORT
(b) Closest Satellite
(c) Sufficient EIRP towards satellite.
NOTES:
1 Satellite links are considered valid if they are present in the System
Information Broadcast. The stored copy of the Satellite Table on the ACD
is updated with the satellite's System Information Broadcast when new
information is available.
2 Satellite links are considered unavailable for any of the following
conditions:
• The elevation look angle (from horizontal) to the satellite ≤ - 4
degrees.
• All Satellite Links for that satellite have been marked as permanent or
temporary failures.
(5) When automatic satellite selection is active, the ACD tells the Channel Card on which
valid satellite link to attempt a Network Logon.
(6) When all the following occurs:
(a) Automatic satellite selection is active.
(7) In Standalone mode, The ACD:
(a) Repeatedly loops through valid and available satellite links in order of preference
(b) Clears the list of temporarily blacklisted satellites before restarting the loop
DRAFT
3rd rvw Draft as of:
29 January, 2020