International Technical Symposium on Navigation and Timing Nov. 17- 18, 2014

in cooperation with
International Technical Symposium
on Navigation and Timing
Ecole Nationale de l’Aviation Civile
Toulouse - France
Nov. 17- 18, 2014
Bellonte amphitheater
Scope of the Symposium:
The objective of this symposium is to gather experts and
innovators that will present their views/work on specific
navigation- and/or timing-related topics, with an emphasis
on technical aspects.
The symposium is composed of three sessions (this year
“Navigation in Constrained Environments”, “GNSS Signals
and GNSS Performance” and “Air Navigation”). Each session will last for half a day and will consist of four presentations followed by a panel discussion that will allow the
audience to interact with the experts.
A poster session to promote the work performed by PhD
students is also organized.
Gold partners:
Silver Partners:
2014 Invited Speakers:
Boubeker Belabbas
GNSS Integrity Group Leader, DLR, Germany
Axel Garcia-Peña
Assistant Professor, ENAC, France
Lionel Garin
Senior Director of Technology, Qualcomm QCA, USA
Andriy Konovaltsev
Scientific Assistant, DLR, Germany
Carl Milner
Assistant Professor, ENAC, France
Michel Monnerat
Manager of Positioning Solution and Security
department, Thales Alenia Space, France
Mark Petovello
Professor, University of Calgary, Canada
Catherine Ronflé-Nadaud
Head of ENAC RPAS lab, ENAC, France
Jaume Sanz Subirana
Professor, Universitat Politècnica de Catalunya, Spain
Norbert Suard
Senior expert in GNSS/SBAS performances, CNES, France
AJ Van Dierendonck
AJ Systems, USA
Todd Walter
Senior Research Engineer, Stanford University, USA
Registration:
The symposium is free-of-charge but the number of seats
is limited, so register as early as possible.
You can register at the following address:
http://cct.cnes.fr/content/international-technicalsymposium-navigation-and-timing
Bronze partners:
Contacts:
ENAC - Symposium Chair :
Olivier Julien (ojulien@recherche.enac.fr)
CCT PDS :
Catalina Rodriguez and Marc Jeannot (cct-pds@cnes.fr)
in cooperation with
International Technical Symposium
on Navigation and Timing
Tuesday Nov 18th, 2014
Programme
Session 2 - GNSS Signals and GNSS Performance
8:30-9:05
«Benefits and Limitations of New GNSS Signal Design»
Dr. AJ Van Dierendonck (AJ Systems, USA)
Monday Nov 17th, 2014
13:00-13:30Registration
9:10-9:45
«GNSS Navigation Message Analysis and Perspectives»
Dr. A Garcia-Peña (ENAC, France)
13:30-14:00Welcome
Session 1 - Navigation in Constrained Environments
14:00-14:35
«Antenna arrays for robust GNSS in
challenging environments»
Dr. A. Konovaltsev (DLR, Germany)
10:30-11:05
«Global High Accuracy Navigation»
Prof. J. Sanz Subirana (UPC, Spain)
14:40-15:15
«Integrating Sensors for Robust Navigation»
Prof. M. Petovello (Univ. of Calgary, Canada)
11:10-11:45
«GNSS Failure Analysis and Impact
on User»
N. Suard (CNES, France)
Coffee Break
15:45-16:20
«Evolution of Navigation Platform in Smartphones»
Dr. L. Garin (Qualcomm QCA, USA)
11:50-12:35
Panel Discussion with all speakers
Moderator: C. Macabiau (ENAC, France)
Lunch
16:25-17:00
«Integrity in Multimodal Transport
Application: Standards are on the Way»
M. Monnerat (TAS, France)
Session 3 - Air Navigation
14:00-14:35
«GBAS Perspectives»
Dr. C. Milner (ENAC, France)
17:05-17:50
Panel Discussion with all speakers
Moderator: O. Julien (ENAC, France)
14:40-15:15
«The future of SBAS and RAIM»
Dr. T. Walter (Stanford Univ., USA)
Cocktail
ENAC Campus Map
Practice
de Golf
VÉDRINES
ADER
ADER
CAS
CAUDRON
DAURAT
PILATRE DE ROZIER
BLÉRIOT
BREGUET
ORLY
BREGUET
Location
of the Symposium
BELLONTE
Amphitheater
COUZINET
ESNAULT-PELTERIE
ZIEGLER
Accès IAS
(Institut
Aéronautique
et Spatial)
GALY
ACCUEIL
FARMAN
MERMOZ
GARROS
DAURAT
Résidences
YEAGER
GUILLAUMET
BASTIÉ
A. de St EXUPÉRY
HYMANS
HYMANS
ENAC
visitor
Parking
LATÉCOÈRE
16:25-17:00
«How RPAS (Remotely Piloted Aircraft System) could be integrated in the airspace»
C. Ronflé-Nadaud (ENAC, France)
17:05-17:50
Panel Discussion with all speakers
Moderator: L. Azoulai (Airbus, France)
WARNER
Poste de garde
Entrance
N
JOLY
PLANÉTARIUM
Coffee break
15:45-16:20
«Alternative Positioning, Navigation, and Timing (APNT) for Performance Based Navigation»
B. Belabbas (DLR, Germany)
Beach Volley
SYNDICATS
VOISIN
Coffee break
PhD students’s Poster Session
K1
Accès
arrêt de bus
Conclusions and Farewell
ENAC address : 7, Avenue Edouard Belin, 310055 Toulouse, France
Gold partners:
Silver Partners:
Bronze partners:
in cooperation with
International Technical Symposium
on Navigation and Timing
Abstracts
Session 1 - Navigation in Constrained Environments
Antenna Arrays for Robust GNSS in Challenging Environments,
Dr. A. Konovaltsev (DLR, Germany)
Since global navigation satellite systems (GNSSs)
rely on the use of radio signals, their performance
can seriously be affected by the signal distortions
occurring in the propagation channel between a satellite and the user. Particularly challenging are the
local area effects such as multipath and radio frequency interference phenomena, which can hardly be
managed on the system level. On the user level the
solution is to increase receiver robustness against interfering effects. In this presentation we will show
how the utilization of the antenna arrays and signal
processing in spatial domain can help to handle the
multipath and radio frequency interference problems.
The following topics will be addressed: integration
of antenna array processing into the GNSS receiver
architecture; antenna array hardware; types of array
signal processing: beamforming, space-time arrays,
direction-of-arrival estimation, statistical array processing for signal parameter estimation; theoretical
and practical results on the improvement of the GNSS
receiver performance in challenging environments; future trends in this field.
Integrating Sensors for Robust Navigation,
Prof. M. Petovello (University of Calgary, Canada)
One of the major challenges facing navigation system
developers is developing algorithms that are robust
to different environments, errors and user requirements. Integration of complementary sensors is a key
method of addressing this challenge, but is itself not
always straightforward. This presentation will define
robustness from a heuristic and mathematical perspective. Then, various types of sensors will be considered for integration, as will be the different integration architectures along with their respective benefits
and drawbacks. The role of GNSS—and its possible
abandonment—will also be discussed. Practical results will be presented as appropriate.
Evolution of Navigation Platform in Smartphones,
Dr. L. Garin (Qualcomm QCA, USA)
The notion of Smartphone as an always available
secondary computing platform beyond the Personal Computer became prevalent few years ago, and
Gold partners:
through its applications as preferred tool for self and
cooperative location. From another instantiation of
the Personal Navigation Device mainly used for car
navigation, it became the platform of choice for personal (including pedestrian navigation), where its first
application was for the so-called last mile navigation
from the car to the final building destination. Now location and navigation are intertwined with all aspects
of smartphone use, more prominently for social applications (where are my friends?), anywhere (including
indoor positioning) and more recently for context
awareness (what am I doing right now? automated
electronic personal assistant). The concept and use of
the platform has undergone tremendous evolutions
and re-engineering we will touch upon, in the point
of view of the services to deliver and technological
challenges for implementation.
Integrity in Multimodal Transport Applications: Standards
are on the Way,
M. Monnerat (Thales Alenia Space, France)
The location technology has entered our day to day
life. The location market demand is today evolving
from “Location everywhere anytime” to “Location
everywhere, anytime and reliable”. Many applications
present indeed a certain level of criticality, and require a high level of reliability. This is the case for
location-based billing applications, critical infrastructure synchronization or rail navigation in which GNSS
can play a central role, provided that a certain level
of integrity can be insured even in very hostile environments. Most of the technical initiatives consider
technologies based on hybridization between GNSS
and other sensors. Standardization has a great role
to play for the development of such technologies.
The strong activity in standardization bodies illustrates both the huge needs for reliability and also the
proactivity of the protagonists. The presentation will
be the occasion to review and discuss the latest developments in such standardization groups, at ETSI/
TC-SES/SCN, CEN, but also at 3GPP and OMA. This
standards review will be the entry point to discuss
new innovative technological approaches that tend to
make positioning more robust in land application environments as well as to supply an integrity indication
to the application layers.
Silver Partners:
Bronze partners:
in cooperation with
International Technical Symposium
on Navigation and Timing
Session 2 - GNSS Signals and GNSS Performance
Benefits and Limitations of New GNSS Signal Design,
Dr. A.J. Van Dierendonck (AJ Systems, USA)
GPS basically started with 3 navigation signals that
were available to anyone. It was then relatively simple
to design receivers that tracked available signals for
a limited set of applications. The benefits and limitations of the available signals were numbered. A number of new GNSS signals have been proposed in the
recent years with a variety of features not used in earlier signal designs – longer codes, higher data rates,
message error detection and control methods, use of
pilot channels, multiplexing, etc. However, do all of
these new signals’ features provide improvements, or
are they simply a result of competition between the
new GNSSs, or alternate signal designs imposed onto
the GNSS users. There is this old question: “Is better
the evil of good enough?”. This presentation aims at
evaluating if these signal improvements are that important and if they have brought any benefits. The
answers here may be opinions of the author, one who
has 40 years of experience with GNSS, but also include opinions of younger GNSS designers and users.
GNSS Navigation Message Analysis and Perspectives,
Dr. A. Garcia-Peña (ENAC, France)
The demodulation of the navigation message is a
fundamental step to compute the user PVT since it
carries the satellites ephemeris and clock error corrections, and, optionally, information to provide additional services (e.g. integrity, corrections, etc…). Historically designed for users in open environments, new
GNSS-based applications demand good demodulation performance even in urban environments. In this
presentation, the current navigation message design,
its required evolution and perspectives are analyzed.
First, the historical motivation of the extended Hamming channel code for GPS L1 C/A is reasoned out.
Second, the improvements brought by the message
structure and channel codes of GPS L2C, L5, L1C and
Galileo E1 OS, E5 signals and their specific implementation (size, interleaver, preamble) are described and
compared. Third, new methodologies to analyze the
navigation message in urban environments are presented and applied to the GPS and Galileo signals.
Finally, proposals based on multiple data components
and dynamic bit rates are presented and discussed.
Gold partners:
Global High Accuracy Navigation,
Prof. J. Sanz Subirana (UPC, Barcelona)
Precise Point Positioning (PPP) is a well-known technique that allows to any worldwide user to achieve
sub-decimeter level of accuracy navigation, without
needing to set up a reference receiver. This technique
is based in the capability of a Central Processing Facility (CPF) to compute precise orbits and clocks with
a higher accuracy than those broadcast in the navigation message, using measurements collected by
a reference stations network. Several improvements
have been done since the definition of the technique
in the 90’s: (i) the orbit and clock corrections are sent
to users in real time, so the user can navigate by applying such accurate corrections, (ii) the user can fix
the carrier ambiguities in undifferenced mode, improving the accuracy (iii) the technique can be applied in
a multi-constellation scenario. In this presentation we
will review the main features of PPP and some open
issues of this technique, such as the large convergence time or the lack of integrity in the user solution. Finally we will show how an accurate model of
the ionosphere can help to reduce convergence time
in the PPP solution with a dual frequency receiver
and, also, can make feasible the PPP navigation with
a single frequency receiver.
GNSS Failure Analysis and Impact on User,
N. Suard (CNES, France)
A brief review of the different sources of failures that
can occur in a GNSS system will be done starting from
a theoretical category approach and pointing out for
each category some real cases. Some observed cases
will be then presented with more details. The impact
of such cases will be highlighted in the positioning
domain, and when available the SBAS reactions will
be shown. If known, some complementary information detailing or characterizing the failure will be given.
Silver Partners:
Bronze partners:
in cooperation with
International Technical Symposium
on Navigation and Timing
dio frequency interference and the user may potentially loose the navigation service in a wide area during
a critical phase of flight. In order to ensure continuity
of the navigation service, a backup solution must be
provided, that allows performance based navigation
(PBN), i.e. navigation including integrity monitoring,
down to an altitude of 350 ft. A short term solution
considers the use of DME based ranging sources
combined with radar altimeter and additional inertial
sensors. A long term solution considers the use of
signals of opportunity including future communication services like the L-band Digital Aeronautical Communication System LDACS1 developed by DLR. This
presentation details the state of the actual research
in the field of APNT, the technical challenges encountered to achieve accuracy, integrity and continuity of
PBN services based on ground ranging sources. This
presentation will be illustrated by flight trials evaluations including integrity threat analysis and service
volume performance simulations based on error and
threat models obtained using measurements.
Session 3 - Air Navigation
GBAS Perspectives,
Dr. C. Milner (ENAC, France)
This presentation will develop the ongoing developments of SESAR WP 15.3.7 regarding the definition of
a Multi-Constellation Multi-Frequency GBAS concept
to meet CAT II/III precision approach requirements.
The international aviation community, through the
ICAO Navigation Systems Panel (NSP) are reaching
the final stages of standardization of the CAT II/III
GBAS concept using the GPS L1C/A signal, known as
GAST D. This has achieved much in terms of developing the requirements framework but questions remain over whether CAT III operations may be achieved in all regions under all environmental conditions.
With the addition of new signals and satellites, WP
15.3.7 looks to address the benefits that can be made
over the GAST D concept, with regards to the integrity
monitor design, the measurement processing scheme
and the ground-air communication link (VDB) message protocols.
The Future of SBAS and RAIM,
Dr. T. Walter (Stanford University, USA)
RAIM and SBAS currently provide navigational guidance to aircraft. RAIM is worldwide but limited to
only horizontal guidance. SBAS is regional but also
provides vertical guidance down to 200 feet above
the ground. As new signals and constellations are
being fielded, these systems are being updated to
reduce their shortcomings. Advanced RAIM (ARAIM)
may be able to provide vertical guidance and SBAS
coverage can be expanded to most of the globe. This
talk will examine the improvements being developed
for each system and describe the evolution from the
current systems.
Alternative Positioning, Navigation, and Timing (APNT)
for Performance Based Navigation,
B. Belabbas (DLR, Germany)
GNSS is foreseen by both air traffic management research programs NextGen in the US and SESAR in
Europe to be the primary mean of navigation for all
phases of flight. Step by step, it will replace the traditional navigation means based on DME, VOR, ILS,
MLS… GNSS offers flexibility, global availability and
outstanding performance to support Performance
Based Navigation and precision approach under low
visibility conditions. Unfortunately, due to the low level of its signal power, this system is vulnerable to ra-
Gold partners:
How Remotely Piloted Aircraft System (RPAS) could be
Integrated in the Airspace,
C. Ronfle-Nadaud (ENAC, France)
Civil Remotely Piloted Aircraft Systems (RPAS) are
being increasingly used all over the world but under a
fragmented regulatory framework not always defined
in a coherent way. The applications for civil RPAS are
numerous (damage check on infrastructures, monitoring of natural disasters such as flooding, data collection in the atmosphere for weather forecast…). In the
future, they could also be developed in order to relay
communications or deliver parcels. The technology for
civil RPAS is now maturing and there is a potential
for a significant growth and job creation. According
to predictions, the RPAS market could be worth 10%
of the aviation market in the next 10 years — that’s
15 billion per year. But, civil RPAS come in all shapes
and sizes and their integration in the airspace with
the other manned aircraft is a real challenge. This presentation evaluates the needs to introduce RPAS in a
non-segregated airspace. It will focus on RPA categories, RPAS architecture, RPA civil applications, and key
issues for RPAS integration in non-segregated airspace. The presentation also presents the RPAS ICAO,
European and French regulations. Finally the future
steps for RPAS development are presented.
Silver Partners:
Bronze partners:
in cooperation with
International Technical Symposium
on Navigation and Timing
Access to ENAC
By Road
(see Maps below)
By Public Transportation
(http://www.tisseo.fr)
From Toulouse Blagnac Airport (~1h):
Take the Tisséo Airport shuttle bus and get off at “Place
Jeanne d’Arc”. Take Metro Line B (direction “Ramonville”) to “Faculté de Pharmacie” station. Take Bus
No.78 (direction “Lycée de Saint-Orens”) and get off at
“ENAC“ station.
From Matabiau SNCF Railway Station (~0h35):
Take Metro Line A (direction “Basso Cambo”) to
“Jean-Jaurès” station. Take Metro Line B (direction “Ramonville”) to “Faculté de Pharmacie” station. Take Bus
No.78 (direction “Lycée de Saint-Orens”) and get off at
“ENAC“ station.
From City Center - Capitole Square (~0h30):
Take Metro Line A (direction “Balma/Gramont”) to
“Jean-Jaurès” station. Take Metro Line B (direction “Ramonville”) to “Faculté de Pharmacie” station. Take Bus
No.78 (direction “Lycée de Saint-Orens”) and get off at
“ENAC“ station.
By Taxi
Ask for ”ENAC”, 7 Avenue Edouard Belin in “Complexe
Scientifique de Rangueil“ to the driver.
Gold partners:
From Toulouse-Blagnac Airport (~0h25):
At the airport, take direction Toulouse. Once on the
highway, follow direction “Montpellier”. Once on the
“Périphérique extérieur“ (ring road), take exit 20 «Complexe Scientifique de Rangueil». At the first roundabout,
take the first right. Go straight at the next roundabout.
Turn left at the next roundabout.
From Bordeaux, Paris, Auch, Tarbes or Foix:
Take the “Périphérique Extérieur” (ring road) towards
“Montpellier” and take Exit 20 «Complexe Scientifique
de Rangueil». At the first roundabout, take the first
right. Go straight at the next roundabout. Turn left at
the next roundabout.
From Barcelona, Marseille or Montpellier:
Take the “Périphérique Intérieur” (ring road) towards
“Toulouse Centre/Foix/Tarbes“. Take Exit 20 «Complexe
Scientifique de Rangueil». At the first roundabout, go
left (4th exit). Go straight at the next roundabout. Go
straight at the next roundabout. Turn left at the next
roundabout.
From the City Center:
Leave the ring road at Exit 20 and turn down Avenue
Edouard Belin. The entrance to ENAC is at the second
roundabout on the left
Silver Partners:
Bronze partners: