Users Manual

ALL

EFFECTIVITY

Page 5-29

22 Apr 2019

23-15-49

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL

ASPIRE-400

(5) If automatic satellite handover is activated, the SDU prohibits initiated handover for the

time provided by the "non-preferred service dwell timer" (see Gateway Configuration

section) on all logons except for:

(a) The initial automatic logon on power-up (ORTenabled).

(b) The initial logon after the pilot has selected Auto-logon.

(6) The SDU prohibits a handover attempt (initiated satellite link logoff) under any of the

following conditions:

(a) Active cockpit call is present;

(b) Active AIS Streaming Class;

(7) If automatic satellite handover is activated and handover is not currently prohibited, the

SDU initiates a satellite link logoff when all the following occur:

(a) A candidate satellite has higher preference;

(b) There is sufficient EIRP towards that candidate satellite;

beam common channel for that candidate satellite and the candidate satellite is

within coverage for its current location.

(d) A candidate satellite has equal preference;

AND

(e) There is sufficient EIRP towards that candidate satellite;

AND

(f) The SDU has a valid spot beam map from the spot beams listed on the global

beam common channel for that candidate satellite and the candidate satellite is

within coverage for its current location;

AND

(g) That candidate satellite is closer to the AES.

(8) If automatic satellite handover is triggered, the SDU temporarily blacklists the current

satellite.

(9) The ACD communicates the Satellite Handover status to the APP.

9. Safety Data Session

A. Safety Data VPN Establishment

(1) The AES only attempts to setup the VPN when:

(a) A valid Certificate Revocation List (CRL) is available;

AND

(b) Valid aircraft certificate is available;

DRAFT

3rd rvw Draft as of:

29 January, 2020