Transcript Document
Navigation System Panel (NSP)
Summary of Recent Meetings
SBAS IWG #25 Meeting
St Petersburg, Russia
25-26 June 2013
Roland Lejeune
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Introduction
(1 of 2)
One NSP meeting took place since IWG/24:
– March 19-28, 2013
Agenda items of direct interest to IWG:
– ICAO Secretariat announcements
– Review of the work program in light of the outcome of the 12th Air
Navigation Conference
– Core constellations and SBAS standards
Other agenda items (not covered in this briefing):
– GBAS standards
– Conventional Navigation Aid standards
– Spectrum issues
– Implementation issues
© 2013 The MITRE Corporation. All rights reserved.
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ICAO Secretariat announcements
Amendment 88 to Annex 10 was adopted by the Council in
February 2013
– It contains no changes originating from NSP, but Volume I contains
some changes from the Approach Classification Task Force
– It will become applicable in November 2013
Amendment 89 has passed final review by the Commission and
should be adopted by the Council in early 2014
– It contains changes approved by NSP in 2011 and 2012
– It will become applicable in November 2014
Amendment 90 is in the planning stage
– It will contain changes approved by NSP in 2013
– It will be applicable in November 2015
2nd Edition of GNSS Manual (Doc 9849) has been published
© 2013 The MITRE Corporation. All rights reserved.
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Review of the work program in light of the
outcome of the 12th Air Navigation Conference
The 12th Air Navigation Conference (ANConf/12) generated 6
recommendations directly related to the work of NSP
– ANConf/12 was held on 19-30 November 2012 in Montreal
– Navigation was a small part of the agenda
NSP generated 6 “Job Cards” describing the work it proposes to do
in response to the 6 recommendations
– Job Cards are new forms developed by the Commission to make
decisions on, and track the progress of, panel work items
The 6 Job Cards address the following areas of work
a. GNSS radio frequency interference
b. GNSS evolution and multi-constellation
c. Mitigation of space weather effects
d. Alternative position navigation and timing (APNT)
e. Navigation aid rationalization
f. Maintenance of the ICAO Navigation Roadmap
© 2013 The MITRE Corporation. All rights reserved.
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Core constellation standards
GLONASS
– An analysis of the GLONASS L3 CDMA link budget assuming a user
antenna with gain profile in the SARPs yielded a negative margin.
Standardization of dual-frequency antennas will require further work.
– GLONASS will transition to an updated coordinate system (PZ-90) by
1 January 2014. Conversion to WGS-84 will be provided.
– GLONASS has 24 satellites and 5 ready to be launched, and
measured performance shows improvements
BeiDou
– Interface Control Document (ICD) version 1.0 for the BeiDou B1I
signal has been published.
– The constellation has 14 active BeiDou navigation satellites (5 GEOs,
5 MEOs and 4 IGSOs) and is providing service in Asia-Pacific region.
– Initial draft SARPs material for BeiDou Open Service (OS) B1I.
Material will need to be revised to fit within concise format intended to be
used for standardization of future constellations and signals
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SBAS standards
Proposed changes to SBAS SARPs for consistency with SBAS user
receiver MOPS, DO229D
– 17 minor changes informally approved
– 8 more significant changes to be revisited at next meeting
– Change package to be formally approved at next meeting
Proposed change to remove APV-II and rename APV-I simply APV
– Proposal originated from Instrument Flight Procedure Panel (IFPP)
desire to remove confusion and simplify the development of obstacle
clearance criteria
– Change not agreed as proposed, but agreement to revisit the issue at
the next meeting (and, if possible, address perceived confusion
between operation and performance level in Table 3.7.2.4-1)
Proposed method for computing continuity from recorded data
– Agreement to include a description of the method in a future update of
the GNSS manual
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Multi-constellation GNSS
Observations regarding the development of multi-constellation
systems
– 4 constellations will potentially be able to support PBN applications in
the 2020+ timeframe: GPS, GLONASS, Galileo, BeiDou
– Vision from ANConf/11 (2003) in which States neither mandate, nor
prohibit, the use of any specific constellation(s) may not be fully
realized in the future
– Future standardization efforts will need to address these issues with
practical, cost-effective solutions
– Gaining confidence in performance of new constellations will require
time, data analysis, and commitments from service providers
Presentation of IWG Work Plan to facilitate the standardization of
DFMC systems
– GNSS SARPs subgroup to review and provide comments
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Other Issues
ICAO and ITU signed a memorandum of cooperation on dealing
with interference issues
– Focus on interference issues with implications to global aviation that
cannot be resolved at the State level
– NSP developed material on reporting incidents, which may be
included in a State Letter or in a future update of the GNSS manual
Approach reclassification
– ICAO established a Task Force to develop proposals to address the
confusing approach terminology
– Task Force settled on an approach that limits changes to existing
documentation
Developed a mapping between different terminologies used in different
annexes
Operations will be classified on basis of achieved minima (Types A and B)
Documentation impact limited to Annex 6 to define the new classification
© 2013 The MITRE Corporation. All rights reserved.
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Acronyms
APNT
APV
GBAS
CDMA
DFMC
GNSS
IWG
ITU
LPV
MOPS
NSP
PBN
SARPs
SBAS
Alternative Position Navigation and Timing
Approach with Vertical Guidance
Ground-Based Augmentation System
Code Division Multiple Access
Dual-Frequency, Multi-Constellation
Global Navigation Satellite System
Interoperability Working Group
International Telecommunication Union
Localizer Performance with Vertical Guidance
Minimum Operational Performance Standard
Navigation Systems Panel
Performance-Based Navigation
Standards and Recommended Practices
Satellite-Based Augmentation System
© 2013 The MITRE Corporation. All rights reserved.