ION Webinars

ION Webinars provide timely, engaging presentations on topics of interest to the PNT community.

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Upcoming Webinars

GAO Report, “Defense Navigation Capabilities”
Co-hosted by the Resilient Navigation and Timing Foundation
Tuesday, June 15 at 11:00 a.m. EDT

Moderated by: Dana A. Goward, Resilient Navigation and Timing Foundation

Register Now for this Complimentary Webinar!

RNTFJoin the Institute of Navigation (ION) and the Resilient Navigation and Timing Foundation for a complimentary webinar featuring the recently published GAO Report “Defense Navigation Capabilities.”

On the 10 of May the General Accountability Office (GAO) released its report “Defense Navigation Capabilities: DOD is Developing Positioning, Navigation, and Timing Technologies to Complement GPS.” Among the report’s recommendations were that the Department of Defense consider using resilient technologies as the cornerstone of its PNT efforts going forward, instead of its current plan to build its plans around GPS.

The webinar will feature representatives from the Senate Armed Services Committee staff discussing the impetus for GAO’s efforts, and two of the principal authors of the report who will discuss their findings.


Factor Graph Optimization for GNSS/INS Integration: A Comparison with the Extended Kalman Filter
Monday, June 28 at 11:00 a.m. EDT

Presented by: Dr. Li-Ta Hsu, The Hong Kong Polytechnic University

Register Now for this Complimentary Webinar!

Factor graph optimization (FGO) recently has attracted attention as an alternative to the extended Kalman filter (EKF) for GNSS-INS integration. This study evaluates both loosely and tightly coupled integrations of GNSS code pseudorange and INS measurements for real-time positioning, using both conventional EKF and FGO with a dataset collected in an urban canyon in Hong Kong. The FGO strength is analyzed by degenerating the FGO-based estimator into an “EKF-like estimator.” In addition, the effects of window size on FGO performance are evaluated by considering both the GNSS pseudorange error models and environmental conditions. We conclude that the conventional FGO outperforms the EKF because of the following two factors: (1) FGO uses multiple iterations during the estimation to achieve a robust estimation; and (2) FGO better explores the time correlation between the measurements and states, based on a batch of historical data, when the measurements do not follow the Gaussian noise assumption.


Past Webinars

Date Title Presented By
May 27, 2021 Hurricane Hunters: Navigating a Plane through a Hurricane Lt. Cmdr. Brian Richards
May 11, 2021 Multi‐slices navigation approach for unknown 3D environments using micro aerial vehicles Dr. Haytham Mohamed
April 20, 2021 GNSS interference mitigation: A measurement and position domain assessment Dr. Daniele Borio and Dr. Ciro Gioia
March 23, 2021 Navigation of the Mars 2020 Perseverance Rover from Earth to Jezero Crater Dr. Gerhard Kruizinga

February 18, 2021

Effect of GPS III weighted voting on P(Y) receiver processing performance Dr. Karl Kovach

December 10, 2020

Automatic detection of ionospheric scintillation-like GNSS satellite oscillator anomaly using a machine-learning algorithm Yunxiang (Leo) Liu and Dr. Y. Jade Morton
November 12, 2020 Residual-based multi-filter methodology for all-source fault detection, exclusion, and performance monitoring Dr. Juan Jurado
October 22, 2020

Relative navigation of fixed-wing aircraft in GPS-denied environments

Dr. Kevin Brink
August 20, 2020

Multi-Constellation ARAIM Exploiting Satellite Motion

Dr. Mathieu Joerger
July 9, 2020

Improving Environment Detection by Behavior Association for Context-Adaptive Navigation

Dr. Han Gao
June 25, 2020

When GNSS fails, what will you do? MarRINav!
Co-sponsored by ION, the Resilient Navigation and Timing Foundation, and the Royal Institute of Navigation

Jonathan Turner, Alan Grant and Dana Goward
May 28, 2020 Impact of Sample Correlation on SISRE Overbound for ARAIM Dr. Santiago Perea
April 16, 2020 Flight Results of GPS-Based Attitude Determination for the Canadian CASSIOPE Satellite Dr. André Hauschild
March 5, 2020 Gaussian-Pareto Overbounding of DGNSS Pseudoranges from CORS Dr. Jordan D. Larson
December 5, 2019 LTE Receiver Design and Multipath Analysis for Navigation in Urban Environments Kimia Shamaei and Zak Kassas