DFMC
Work Plan Update
Presented to: IWG 26
By: Jason Burns (FAA)
Date: February 5-7, 2014
Federal Aviation
Administration
Outline
• Background / Purpose
• Task Progress Review
• Discussion areas
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
2
Background and Purpose
• IWG has identified the need for a DFMC Definition
Document outlining a requirements concept for
Dual Frequency Multi-Constellation (DFMC) SBAS
• A draft work plan to develop this document was
presented at Ottawa 2012 (IWG-23)
– Presented again at IWG-24
• This work plan status update
– Identifies efforts in progress
• Should assess progress based on presentations
– Identifies areas with little to no effort
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
3
3
Tasks
• Operational Concept
– Operational Goals and Services
– GEO Selection and Transition
– Reversionary Modes
– Identify Benefits
• System Requirements
– Interchangeable Satellites
– Safety Strategy
– Avionics Design Constraints
• Interface Definition
– Interface Requirements
– Interface Control Document
• Definition Document
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
4
Operational Goals and Services
• Objectives
– Identify minimum target operations and supporting services
– Propose service classification schemes for coordination with standards
bodies
• Status
– Initial proposed operational targets discussed at IWG 23. Documented
in Work Plan Section 2
– Fairly well documented in Definition Document outline
• Contains no new services or operations beyond current DO-229
– Need to update if there are specific changes for ADS-B or TBO
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
5
GEO Selection and Transition
• Objectives
– Enable SBAS interoperability when transition between different
operations, GEO coverage volumes, SBAS service volumes,
international airspace and state airspace.
• Status
– Briefing and white paper available on options provided at IWG-26 (Feb
2014)
– Requires IWG discussion/guidance on narrowing options
• Request comments by April 30, 2014
– Can develop specific recommended requirements based on SBAS
selection method
• White paper 2-4 months after decision on selection method
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
6
Reversionary Modes
• Objectives
– Identify minimum required avionics modes and supporting navigational services
to support preferred fallback strategy and minimum operations.
• Status
– Briefing prepared by MITRE for IWG 24
– ESA brief (IWG 26) and white paper (April/May 2014)
• Deliverables
Description
Benefits Analysis of L5 only service and whether
to define it as an optional mode
White Paper identifying preferred set of modes for
avionics and corresponding SBAS Services
Standard User Algorithms specification/definition,
verification and justification, for each individual
algorithm.
DFMC Work Plan
February 5-7, 2014
Deliverable
Report
POC
Eurocontrol
Due Date
Still need to resolve
White Paper
MITRE
Complete IWG 24
Extract of
PROSBAS
D2.3.1
Document
EC/ESA
• Internal ESA/EC review
• April/May 2014 : Input for
IWG DFMC Document
Federal Aviation
Administration
7
Identify Benefits
• Objectives
– Identify benefits for ANSP and avionics manufacturers
• Status
– No definite plan to address
– Any interest, commitment from new States
• Support for SBAS reference stations
• Approval of SBAS service based on dual-frequency
Description
Deliverable
POC
Due Date
Draft Benefits section of Definition
Document
Documents results of feasibility analysis.
Identifies key risk areas and future work.
Draft Sections
TBD
TBD
White Paper
TBD
TBD
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
8
Interchangeable Requirements
• Objectives
– Identify technical issues necessary to support this capability
– Derive requirements necessary to mitigate technical issues
– Identify and quantify any resulting technical risks associated with this
capability and the derived requirements.
• Status
– ESA Position Computation Equations
• Definition of Inter System Issues (Geodetic References, Time References, Inter
System Bias)
• April/May input for DFMC Definition Document
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
9
Safety Strategy
•
•
Objectives
– Explain high level safety strategy and clearly identify subsystem safety objectives (e.g.
integrity and continuity performance targets)
Status
– No drastic change from current SBAS standards on approach to safety (e.g. not reallocation
of integrity between ground and airborne subsystems)
– ESA Protection Level Calculations
• Brief at IWG-26, April/May input for DFMC Definition Document
– Threat list or modification of Safety Strategy effort not underway
• Propose using threat listed in ARAIM paper (see additional briefing)
Description
Safety Strategy of Definition Document
Threat List
User Performance Allocations - Airborne and ground
subsystem integrity and continuity allocations
Deliverable
Draft Sections
White Paper
Extract of
PROSBAS D1.3.2
Document
POC
IWG
IWG
EC/ESA
Due Date
TBD
TBD
• Internal ESA/EC review
• April/May 2014 : Input for
IWG DFMC Document
Specification, Verification and Justification of the SBAS
L1/L5 Standard User performances, both for each individual
performance, and for the global Performance
Extract of
PROSBAS D2.4.1
Document
EC/ESA
• Internal ESA/EC review
• April/May 2014 : Input for
IWG DFMC Document
Draft Definition Document sections for airborne and ground
subsystem performance requirements
Draft Sections
FAA
TBD
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
10
Avionics Design Constraints
• Objectives
– Identify key minimum design constraints which avionics must comply
with to enable DFMC concept
• Status
– Briefed Signal Quality Monitoring and recommended correlation
requirements (IWG-25, RTCA Oct 2013)
– ESA working aviation error budgets
Description
Deliverable
POC
Due Date
Airborne and Ground subsystem tracking
requirements, RF requirements, etc.
Draft Sections
FAA
RTCA brief
Oct 2013
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
11
Interface Requirement
• Objectives
– Develop interface requirements
• Status
– Reached consensus on ICD changes
– Need to document signal format changes and accompanying
requirements
• E.g. propose redlines to DO-229D, Appendix A which describes
current signal specification
Description
SIS RF Definition
Interface Requirements
DFMC Work Plan
February 5-7, 2014
Deliverable
Extract of
PROSBAS D2.1.1
Document
POC
Existing
eurocae
complemen
ted by EC /
ESA
Due Date
4 versions :
Draft Sections
TBD
TBD
May 2013, Nov
2013, May 2014,
Nov 2014
Federal Aviation
Administration
12
Interface Control Document
• Objectives
– Develop the message
structure for DFMC GEO
L1 and L5 SIS
• Status
– Reached consensus on ICD
changes – Dec 2013
• Briefed at IWG 26
• Working on updated ICD
– Recall previous SiS, transport
layer effort
DFMC Work Plan
February 5-7, 2014
Description
SiS Messages Definition
Deliverable
Extract of
PROSBAS
D2.2.1
Document
POC
EC / ESA
Due Date
Beginning 2014
Assessment of Message performances
Extract of
PROSBAS
D2.2.2
Document
EC / ESA
•
PROSBAS
ION GNSS+
2013 paper
Trade analysis of formatting options
Presentations
EC/ESA
•
PROSBAS
ION GNSS+
2013 paper
•
Documentation of preferred format,
including preliminary IRD and ICD
information.
Draft Interface Control Document (ICD)
Extracts of
PROSBAS
Documents
Draft ICD
EC/ESA
Stanford ION
GNSS+ 2013
paper
IWG (mid 2013)
EC/ESA
Beginning 2014
Detailed Interface Control Document (ICD)
Interface
Control
Document
TBD
Update release end
2014, modify
through standards
process
Federal Aviation
Administration
13
Definition Document
• Objectives
– Identify required Definition Document content and assign resources
– Maintain Definition Document and populate with information when
available
• Status
– Initial outline drafted. Briefing prepared by FAA for IWG 24.
– Updated expected following white paper receipt April/May 2014
• Deliverables
Description
Draft initial Definition Document outline
identifying sections needed to address key DFMC
concept issues.
Incorporate all sections into the Definition
Document. Finalize draft for IWG review and
approval.
DFMC Work Plan
February 5-7, 2014
Deliverab POC
le
DFMC
FAA
Definition
Document
Outline
DFMC
FAA
Definition
Document
Due Date
Dec 2012
Dec 2014
Federal Aviation
Administration
14
Discussion Areas
• Benefits for Dual-Frequency SBAS
• Benefit of optional L5 ionosphere grid broadcast
• Safety strategy
– Threat list / threat identification
– Effort required if desire to support operations more demanding
than LPV-200
• Interface Requirements Document
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
15
Summary
• Review progress of work plan
• Provided updates based on presentation at IWG 26
• Identified work plan topics at risk
• Discussed path forward
• Please provide comments to
– joseph.ctr.dennis@faa.gov
– jason.burns@faa.gov
DFMC Work Plan
February 5-7, 2014
Federal Aviation
Administration
16
Backup
Presented to: IWG 26
By: Jason Burns (FAA)
Date: February 5-7, 2014
Federal Aviation
Administration