Amendment Proposal (AP) to Doc 9925
Title:
Update of the technical specification (Doc 9925) due to
future operational requirements stemming from the use
of new aeronautical applications
AP working paper number and date:
To be defined by ACP WG-M
Document(s) affected:
Doc 9925, Manual on the Aeronautical Mobile Satellite
(Route) Service, First Edition 2010
Sections of Documents affected:
Doc 9925, ADS. Page 29 2.1.16 and 2.1.17, 2.121 and
Section 4.4 RCP and a proposed new Section 4.4.1 RSP.
Coordinator:
To be completed
Coordinators address:
To be completed
Coordinators Phone:
Coordinators Fax:
Coordinators e-mail address:
Category:
NON-CRITICAL
Due to impending future deployment if new aeronautical
applications that will use AMSRS in the long term, Doc
9925 Technical Manual requires updating.
Problem description:
An immediate problem does not exist, however Doc
9925 needs to reflect impending deployment of new
aeronautical technologies and make reference to the
RCP and RSP parameters and external MASP’s material
under which they should operate.
Background:
Doc 9925, Page 29 on ADS section 2.1.16 and 2.1.17,
2.121 requires textual updating, also text updates are
needed in section 4.4 RCP to reference specific Docs
(such as new RTCA MASP’s material. In line with
section 4.4, it is proposed to have a new section 4.4.1 on
RSP, and to reference applicable technical material.
Backwards compatibility:
Not considered an operational or technical issue.
Amendment Proposal:
Submission date: 2013
Page 29
page 1 of 3
Automatic dependent surveillance (ADS)
2.1.16 The introduction of satellite communication technology,
together with sufficiently accurate and reliable
aircraft navigation, e.g. by GNSS, presents ample opportunity
to provide better surveillance services mostly in areas
where such traditional terrestrial radar services lack
deployment — in particular over oceanic areas and other
remote areas where radar systems prove difficult,
uneconomical, or even impossible to implement. The evolution
of satellite communication technology and ADS can now be
combined to provide enhanced safety and efficiencies in
airspace management.
2.1.17 ADS is an application whereby the information
generated by an aircraft’s on-board navigation system is
automatically relayed from the aircraft, via satellite data link, to
the ATS and displayed to the air traffic controller on a
display similar to radar. The aircraft position report and other
associated data can be derived automatically, and in
almost real-time, by the ATC system, thus improving its safety
and performance efficiency. Ground-to-air messages also will
be required to control the ADS information flow as in the case
of ADS-C. Where ADS-B service is supported via satellite, no
ground-to-air message flow intervention is used. The
dependant “broadcast” application is fully automated, thus
making the aircraft position data available to a spaceborne
ADS-B receiver onboard a satellite. The available ADS-B
aircraft position data received by the satellite ADS-B receiver
can then be data-linked via satellite and ground infrastructure
to the ATS facility, providing near real-time display of aircraft
position for efficient airspace management.
Automated downlink of airborne parameter services
2.1.21 The automated downlink of information available in the
aircraft will support safety services. Such service
may, for example, help detect inconsistencies between ATCused flight plans and the flight plan activated in the aircraft’s
flight management system. Existing surveillance functions on
the ground can be enhanced by downlinking of specific tactical
flight information such as current indicated heading, air speed,
vertical rate of climb or descent, and wind vector. With the
evolution of satellite technology and ADS-B capability via
satellite in oceanic and remote regions the potential exists to
have triggered aircraft flight data recorder and/or cockpit voice
recorder data (FDR/CVR) available via satellite to an
ATS/ANSP to support accident or incident investigation.
4.4.3 Guidance material on RCP is contained in the Manual on
required communication performance (RCP)
(Doc 9869). Any RTCA MASP’s material that is also
applicable.
4.4.1 REQUIRED SURVIELLANCE PERFORMANCE (RSP)
Insert appropriate text from Doc xxxx RSP document to
describe the surveillance requirements, and a reference to the
Doc as well as any RTCA MASP’s material that is applicable.
Submission date: 2013
page 2 of 3
WG-M status:
Submission date: 2013
PROPOSED
page 3 of 3