ITM/PTTI Call for Abstracts

Technical Committee

ITM General Chair: Steve Rounds, John Deere
ITM Program Chair: Dr. André Hauschild, German Aerospace Center (DLR), Germany
PTTI General Chair: Ryan Dupuis, Excelitas Technologies
PTTI Program Chair: Michael Lombardi, NIST
PTTI Tutorials Chair: James Hanssen, USNO

Download the ITM/PTTI 2017 Call for Abstracts

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Technical Session Listing

ITM/PTTI PLENARY SESSION: Back to the Future: Forecasts for Time and Navigation, 1917 and 2017
Following the New Year’s custom to look forward to the future and back to evaluate the past, this
presentation will explore significant forecasts made in 1917 about time and navigation and relate
them to the future as we envision it from 2017. Some of these predictions turned out to be amazingly
accurate. Others turned out to be pipe dreams. Examples will come from science, science fiction and
technical work.
Carlene E. Stephens, Curator, Division of Work and Industry, Smithsonian National Museum of
American History

International Technical Meeting Session Topics

Algorithms for GNSS Processing and Sensor Integration 1

Dr. Jean-Marie Sleewaegen, Septentrio, Belgium
Dr. Thomas Pany, IGASPIN GmbH, Austria

Algorithms for GNSS Processing and Sensor Integration 2
New signal processing techniques for GNSS receivers and other navigation devices to provide improved acquisition, robustness, accuracy, sensitivity, timeliness, or other benefits; processing techniques that take advantage of multiple GNSS signals and new signal designs; direct position estimation, vector tracking, block processing or Bayesian techniques (particle filter) and processing techniques that take advantage of GNSS integration with other sensors and signals: utilization of navigation data from out-of-band sources and use of high-rate, near-real-time data from scientific GNSS arrays, including the impact of new arrays; compressing, prioritizing and scheduling network reference data through limited communication channels.
Dr. Jean-Marie Sleewaegen, Septentrio, Belgium
Dr. Thomas Pany, IGASPIN GmbH, Austria

Alternative Sensors and Backups to GNSS 1

Dr. Wouter Pelgrum, NextNav LLC
Courtney Mario, Draper

Interference and Spectrum Management
Effects of interference on GNSS RF bands; theoretical and test results describing effects of GNSS interference on receiver performance; compatibility of GNSS with terrestrial and satellite based services, including those for telecommunications (e.g. Mobile Satellite Service – Ancillary Terrestrial Component (MSS-ATC), potential interference from electronic devices), navigation (pseudolites, repeaters, etc.) and radar; interoperability interference assessments among various GNSS systems and with non-GNSS systems, receiver design trade-offs and approaches for interference environments; spectrum management, policy and frequency protection issues and approaches.
Thomas Kraus, University FAF, Germany
Dr. Olivier Julien, ENAC, France

Modernized and Emerging GNSS
New civil, military and governmental user capabilities and performance, including availability and accuracy improvement concepts of GPS, GLONASS, Galileo, BeiDou, QZSS and IRNSS; open and authorized GNSS services, search and rescue services, and commercial services; optimization of GNSS signal structure, codes and data message; concepts for interchangeability of GNSS constellations; analysis of system performance, mutual interference, impact on noise floor; tools for assessment of RF compatibility and GNSS signal simulators; modernized constellations characteristics and programmatic aspects, ground control and monitoring segments; performance analysis of new satellites; user equipment architecture and design; integration with regional augmentation systems and use of those new systems to support future applications.
Dr. Stuart Riley, Trimble
Satoshi Kogure, JAXA, Japan

Receiver and Antenna Technology
Advancements in GNSS receivers providing advantages in terms of performance, cost, and power consumption; implementation and demonstration of advanced receiver hardware and flexible architectures as well as advances in software-defined GNSS receivers and processing methods; multi-mode, multi-frequency receivers tracking new and/or modernized GNSS broadcasts; advances in RF front-end electronics including multi-GNSS front-ends; improved designs for GNSS antennas, arrays and antenna electronics with emphasis on size reductions, multi-frequency coverage, precision, multipath mitigation and interference suppression.
Dr. Rodrigo Leandro, Hemisphere GNSS
Dr. Sanjeev Gunawardena, Air Force Institute of Technology

Space-borne Applications of GNSS
GNSS applications in Earth orbit; navigation on high-altitude orbits or beyond the GNSS constellations; precise orbit determination, attitude determination, radio occultation, space weather observations, satellite formation flying, en-route lunar navigation; space-service-volume definition of GPS and other GNSS and its impact on mission design, side-lobe and weak-signal tracking; dedicated space-borne receiver and antenna developments and component-off-the-shelf hardware in space; mission results of recent space missions using GNSS.
Frank Bauer, FBauer Aerospace Consulting Services
Dr. Jan Weiss, UCAR

Advanced RAIM and Integrity 1

Dr. Okuary Osechas, German Aerospace Center (DLR), Germany
Dr. Mathieu Joerger, The University of Arizona

Advanced RAIM and Integrity 2
New concepts in monitoring multi-constellation GNSS integrity and continuity at the user receiver and at the ground segment; development of monitoring and fault exclusion algorithms, protection level derivation, and navigation requirement definition for RAIM and ARAIM; impact on integrity, continuity, and availability of GNSS faults (including satellite and constellation failure modes) and of external threats (such as interference and spoofing); potential implications of future GNSS performance for automated navigation applications, including aviation, automotive, rail, and maritime transportation; integrity of sensor fusion algorithms; derivation of requirements for new Safety-of-Life applications.
Dr. Okuary Osechas, German Aerospace Center (DLR), Germany
Dr. Mathieu Joerger, The University of Arizona

Alternative Sensors and Backups to GNSS 2
Systems for providing navigation and/or timing capability when GNSS is not available; redundant systems to GNSS where backups may be required, such as safety of life applications; alternative and hybrid location methods suitable for consumer products; positioning using WiFi, cellular tower ranging, RFID, Bluetooth, Near Field Communication (NFC), HD Radio/Digital Audio Broadcasting (DAB), Digital TV and other signal of opportunity; orientation and motion estimation from image/LiDAR/LaDAR sequences; map/terrain/landmark matching techniques; combinations of the above methods with inertial sensor measurements; other topics may include DME, LORAN, LDACS and other forms of APNT.
Dr. Wouter Pelgrum, NextNav LLC
Courtney Mario, Draper

High Precision GNSS - PPP
New algorithms and methods for improving Precise Point Positioning (PPP) techniques; PPP with integer ambiguity resolution; ambiguity resolution for GLONASS, Galileo and BeiDou; methods and algorithms for reliable cycle-slip detection; estimation of signal biases relevant for PPP, like fractional phase biases or differential code biases; novel numerical approaches and algorithms for PPP with multiple constellations; preserving precision accuracy in challenged urban environments; improving re-convergence after signal outages; interoperability of correction services with different user equipment; methods for precise prediction of satellite orbits and clocks.
Dr. Javier Tegedor, Fugro Satellite Positioning, Norway
Dr. Sunil Bisnath, York University, Canada

High Precision GNSS - RTK
New algorithms and methods for improving Real Time Kinematic (RTK) techniques; multi-frequency, multi-constellation RTK; improved algorithms for ambiguity resolution; reliable ambiguity resolution over long baselines; network RTK; PPP-RTK in wide areas; heading and attitude determination using multiple antennas; low-cost single frequency RTK implementation; carrier phase multipath mitigation.
Dr. Christian Tiberius, Delft Univeristy of Technology, The Netherlands
Dr. Robert Odolinski, University of Otago, New Zealand

Mitigation of Jamming and Spoofing
Techniques for improving the robustness of GNSS receivers in the presence of jamming and/or spoofing; analysis of real-life data from intentional or un-intentional jamming or spoofing events; techniques for geo-locating jammers and/or spoofers; receiver-based anti-spoofing techniques and use of external infrastructure; signal authentication techniques and related challenges.
Dr. Jason Gross, West Virginia University
Ivan Johnston, L-3/Interstate Electronics Corporation

Atmospheric Effects on GNSS Signals
Effects of the troposphere and ionosphere on GNSS signals; impacts of the atmosphere and of space weather on the operation of GNSS; new techniques and use of GNSS for atmosphere, ionosphere or space weather monitoring for operational systems; new ground-based GNSS experiments and networks; monitoring of space and local weather for GNSS: data assimilation methods and modeling of propagation and effects; occultation of GNSS signals; storm-enhanced densities (SEDs), traveling ionospheric disturbances (TIDs), and scintillation; high, mid, and low-latitude phenomena; events from and studies of the solar minimum; case studies and multiyear statistical overviews; now-casting and forecasting space weather for aviation, marine, geodetic, and timing applications; novel technologies to model and mitigate atmospheric errors.
Dr. Attila Komjathy, NASA JPL
Dr. Miquel Garcia-Fernandez, Rokubun, Spain

Augmentation Systems
Augmentation systems to support GNSS use in various applications; developments in both GBAS and SBAS; governmental SBAS augmentation systems such as WAAS, EGNOS, GAGAN, QZSS, and MSAS; interoperability of SBAS systems with GBAS; private global and regional augmentation systems; augmentation system design, reference station equipment, user equipment and performance; dissemination of integrity support information via high and low capacity data channels from SBAS and GBAS.
Santiago Perea, German Aerospace Center (DLR), Germany
Dr. Todd Walter, Stanford University

Autonomous Navigation
Use of GNSS and alternative/complementary navigation technologies (sensors, signals of opportunity, vision, etc.) for autonomous air, land, marine, or space vehicles or systems; innovative applications for unmanned autonomous systems and resulting navigation accuracy requirements; algorithms for path planning, guidance, and control of autonomous vehicles; techniques based on simultaneous location and mapping (SLAM) and its variants; design of navigation algorithms and fusion architectures; safety related aspects of autonomous vehicle operation.
Dr. Naser El-Sheimy, University of Calgary, Canada
Dr. Zak Kassas, University of California, Riverside

GNSS in Challenging Environments
Operation of GNSS receivers in challenging environments like urban canyons, indoor and high-dynamics applications, etc.; effect and mitigation of signal degradation due to scintillation or foliage; weak signal processing techniques and algorithms; indoor positioning applications; mitigation of multipath in indoor and urban environments; first-responder personal navigation and urban ground-vehicle navigation; algorithms for providing robustness, test methods for characterizing performance and results of receiver testing.
Dr. Fabio Dovis, Politecnico di Torino, Italy
Dr. Maktar Malik, ESA, The Netherlands

Multi-Sensor Fusion 1

Dr. Gert Trommer, Karlsruhe Institute of Technology, Germany
Dr. Walter Lillo, The Aerospace Corporation

Multi-Sensor Fusion 2
Fusion of data from multiple sensors; algorithms, test methods, and results of implementations integrating diverse sensors; coupling of GNSS with inertial sensors, odometers, radar, LiDAR, optical cameras, barometers, infrared or ultrasound sensors; use of network connected devices for navigation, including smartphones, navigation apps, GNSS-based personal navigation systems with online maps, etc.
Dr. Gert Trommer, Karlsruhe Institute of Technology, Germany
Dr. Walter Lillo, The Aerospace Corporation

PTTI Sessions

PTTI Pre-Conference Tutorials
The following pre-conference tutorials will be offered on January 30:

  • Reference Time Scales and Traceability Concepts: Dr. Elisa Felicitas Arias
  • Precision Measurements and Calibration: David Howe
  • Introduction to Atomic Frequency Standards: Dr. Robert Tjoelker
  • Global Navigation Satellite Systems: Dr. Pascale Defraigne
  • Fiber Based Time and Frequency Transfer: Dr. Sven-Christian Ebenhag
  • Earth’s Time Varying Rotation: Dr. Richard Gross

Advances in Clock Technology and in Optical Fiber Time Transfer
New advances in clocks for PTTI applications. Atomic clock design and current and expected future performance for both ground and space (satellite) applications, including microwave, optical, and chip scale atomic clocks. State-of-the art advances in mechanical resonator clocks (quartz, sapphire, MEMS, etc.).
Dr. Sven-Christian Ebenhag , SP Technical Research Institute of Sweden
Dr. Dirk Piester, Physikalisch-Technische Bundesanstalt, Germany

Advances in Computer Time Transfer: NTP, PTP, and Related Systems
The two primary protocols used to deliver accurate time stamps to computer systems, the Network Time Protocol (NTP) and the Precision Time Protocol (PTP), also known as IEEE-1588. NTP and PTP time transfer over both wide and local area networks, and the measurement and evaluation of servers, clients, and networks. Other computer time transfer systems including Synchronous Ethernet (SyncE), White Rabbit, and proprietary and proposed systems will also be explored.
Lee Cosart, Microsemi
Rodney Greenstreet, National Instruments

Advances in Geostationary Satellite Time and Frequency Transfer
Time transfer via geostationary satellites, including the two-way satellite time and frequency transfer (TWSTFT) method utilized for contributions to TAI and UTC. Additional topics include one-way transmissions and time code services from communications satellites used for television, radio, and meteorological applications.
Victor Zhang, National Institute of Standards and Technology
Dr. Demetrios Matsakis, U.S. Naval Observatory

Advances in GNSS Time Transfer
Advances in GNSS time transfer, in particular time transfer with GPS, Galileo, GLONASS, and BeiDou as well as the various augmentation systems. Topics include measurements techniques (P3, PPP, IPPP, etc.), advances in receivers and antennas, system interoperability and multi-GNSS time transfer, and the results of time transfer campaigns and intercomparisons.
Dr. Pascale Defraigne, Royal Observatory, Belgium
Dr. Judah Levine, National Institute of Standards and Technology

Advances in PTTI Measurement Techniques
Advances in measurement techniques and metrics used in PTTI applications. Methods for calibrating cables, fibers, receivers, antennas, and other hardware utilized in time transfer systems; systems and techniques for the measurement of PM/AM noise; measurement methods for clock characterization (including statistics for stability analysis and forecasting clock drift/aging), and advances in measurement instrumentation.
Dr. Archita Hati, National Institute of Standards and Technology
Cameron Everson, Excelitas Technologies

Optical Clocks and the Eventual Redefinition of the SI Second
Since 1971, the second has been defined based on microwave transitions of the cesium atom. This definition will likely be replaced by clocks based on optical, rather than microwave, atomic transitions that resonate at much higher frequencies and are expected to eventually improve upon the accuracy and stability of cesium clocks by several orders of magnitude. This session is devoted to optical clock designs, measurements results, and progress being made towards the redefinition of the SI second.
Dr. Jeffrey Sherman, National Institute of Standards and Technology
Gregory Weaver, John Hopkins Applied Physics Laboratory

The Role of PTTI in Improving GNSS Invulnerability, Reliability, and Performance
Techniques and methodologies for improving GNSS invulnerability, reliability, and performance for PTTI applications, in particular ways to “protect, toughen, and augment” GNSS time. Topics include methods to prevent or mitigate intentional and unintentional RF interference (jamming), the transmission of false information (spoofing), multipath signal reflections, and GNSS broadcast errors, such as those that occurred with GPS in January 2016. Topics also include methods for satellite clocks to autonomously assess the quality of their timekeeping.
James Hannsen, U.S. Naval Observatory
Dr. Jian Yao, National Institute of Standards and Technology

Time is Money: The Role of PTTI in the Financial Sector
The role of PTTI in the financial sector, including methods for insuring that high accuracy, traceable, and verifiable time stamps are available at wide spread locations. Banks and financial markets rely on accurate time information to guard against fraud and protect consumers. This has become more important in recent years due to the increased use of electronic trading platforms and high frequency trading (HFT).
Dr. Elizabeth Laier English, National Physical Laboratory, United Kingdom
Dr. Marina Gertsvolf, National Research Council, Canada

Time Scales and Algorithms
Description and implementation of current and new time scales, including: time scales that include continuously running primary frequency standards, algorithms and methods that advance the state of the art in clock data analysis and their applications; the generation of UTC(k) and reference GNSS time scales with increasing performance; and the use of Kalman filters and other robust statistical techniques.
Dr. Stefania Romisch, National Institute of Standards and Technology
Ken Senior, Naval Research Laboratory

Timing Laboratory Activities and Updates
The opportunity for timing laboratories, including those operated by national metrology institutes, military, and academic organizations; to provide updates describing their current and future PTTI activities; including UTC(k) generation and performance, time dissemination, time services, calibrations, and related research activities.
Dr. Mauricio Lopez, Centro de Investigación y Estudios Avanzados (CINVESTAV), Mexico
Liz Catherine Hernández Forero, Instituto Nacional de Metrologia (INM), Colombia

Abstract Submission Guidelines

Submit Your Abstract

Abstracts should be submitted via the ION Abstract Management Portal, no later than October 3, 2016. To submit an abstract, sign in to the ION Abstract Management Portal. If you have not used the Abstract Management Portal before, click “Create My Account”. Once signed in, click on the appropriate meeting name and complete the form.

Abstracts should describe objectives, anticipated or actual results, conclusions, any key innovative steps and the significance of your work.

Authors will be provided with an author’s kit containing presentation and publication guidelines in early November.

All authors attending the meeting are required to pay registration fees.

Final Manuscripts

ITM Peer Reviewed Sessions: Completed manuscripts must be uploaded to the Abstract Management Portal (AMP) by December 1, 2016. Manuscripts will be designated as a primary paper, or as an alternate paper, in the onsite program based on the Session Chairs’ peer review of the full manuscripts. Manuscripts not received by December 1 will be de-weighted. Corrected/revised manuscripts will be accepted through February 10, 2017.

Papers that are not representative of the original abstract submitted will not be included in the conference proceedings regardless of whether or not they were presented at the conference; and this may affect the acceptance of future abstracts by the author.

To be included in the conference proceedings final manuscripts must meet the peer review requirements, the author must present at the conference and pay the conference registration fee.

PTTI Sessions: PTTI papers will not be peer reviewed. Papers not representative of the original abstract submitted will not be included in the conference proceedings regardless of whether or not they were presented at the conference; and this may affect the acceptance of future abstracts by the author. Manuscripts will be accepted through February 10, 2017.

To be included in the conference proceedings the author must present at the conference and pay the conference registration fee.

Journal Publication

Authors of appropriate papers are encouraged to submit papers for possible publication in the ION’s archival journal, NAVIGATION. Papers may be submitted online at

Student Conference Registration Grants

Student conference registration grants will be awarded on a “need basis”. The registration grant will include a full technical meeting registration to include all conference sessions, meal functions and a copy of the conference proceedings. Full-time graduate or undergraduate students who are the lead and presenting author of worthy technical paper(s) are encouraged to apply. Grants are limited and are awarded on a first come, first served basis to those meeting the criteria. Prior grant recipients are not eligible. An application must be submitted with an abstract no later than October 3, 2016.