Session C3: Positioning Challenges and Solutions for Smartphones and Wearables

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Date: Thursday, September 11, 2025
Time: 8:30 a.m. - 12:15 p.m.
In-Person presenters in this session provide pre-recorded presentations for viewing by registered attendees on Wednesday, September 10.

In-Person Presentations These presentations will be given in-person at the conference. Presenters will provide a pre-recorded presentation for on-demand viewing by all registered attendees.
8:35	Performance assessment of Adaptive Kalman Filter for Smartphone GNSS/IMU Naman Agarwal and Kyle O'Keefe, Department of Geomatics Engineering, University of Calgary
8:57	Precise Smartphone Positioning using Combination of Local Trajectory Optimization and Global Transformation Estimation Taro Suzuki, Chiba Institute of Technology
9:20	GNSS-IR Velocity Estimation in Urban Areas with Low-cost Devices Mingda Ye and Guohao Zhang, Department of Aeronautical and Aviation Engineering, The Hong Kong Polytechnic University
9:43	High-accuracy Smartphone Positioning from a Single Photo: Smartphone-Powered Scene Reconstruction as a Service Yang Jiang and Yan Zhang, Department of Geomatics Engineering, University of Calgary
10:05-10:35, Break. Refreshments in Exhibit Hall
10:40	Assisted NMA with Secure Time Synchronization on Android Smartphones Cillian O'Driscoll, Independent Consultant; Ignacio Fernandez-Hernandez, European Commission; Jon Winkel, Independent Consultant; Tom Willems, European Commission Advisor
11:03	Hypothesis Testing to Adapt Measurement and Process Noise Covariance for Smartphone GNSS Positioning Anurag Raghuvanshi and Sunil Bisnath, York University
11:26	Modeling of Coherent Field Attenuation for GNSS Signals Under Broad-leaf Vegetation Di Hai and Guohao Zhang, Department of Aeronautical and Aviation Engineering, The Hong Kong Polytechnic University
11:48	The GNSS Civil Signals Revolution - Are we Done with the L2 Band Yet? Kendall Ferguson, Hunaiz Ali, Landon Urquhart and Rodrigo Leandro, u-blox
Alternate Presentations Alternate presentations may be given in-person at the conference if other authors are unable to present. Alternate Presenters will provide a pre-recorded presentation for on-demand viewing by all registered attendees.
1.	Error Ellipse-Based Outlier Detection for GNSS Doppler Measurements in Urban Environments Taeho Kim, Jeonghyeon Yun, Byungwoon Park, Sejong University
2.	RTK Positioning with Smartphone Using IMU-Based Cycle Slip Detection Ho Namgung, Hyunwoo Park, Bu-Gyeom Kim, Changdon Kee, Department of Aerospace Engineering, Seoul National University; Beomju Shin, College of Information Science, Hallym University
3.	Design of Adaptive Complementary Filter for Three-Dimensional Attitude Estimation of an Android Smartphone Jeonghyeon Yun, Taeho Kim, Byungwoon Park, Sejong University
4.	Predicted Orbits and Clocks for Enhanced Position Accuracy Aaron Boda, Srinivas Tantry, Sudha Vana, Vijaykumar Bellad, Rx Networks

On-Demand Presentations Pre-recorded presentations will become available for viewing by registered attendees on Wednesday, September 10.
	Deep Learning-Based Environment Identification for Seamless Localization with GNSS Measurements Menggang Sheng, School of Automation and Electronic Information, Xiangtan University; Kangwei Wang, School of Automation and Electronic Information, Xiangtan University; Sheng Liu, School of Mathematics and computational science, Xiangtan University; Xiaoyu Tao, Zhipeng Chen, Zhiqiang Yao, School of Automation and Electronic Information, Xiangtan University
	Performance Testing of Standard GNSS/IMU Positioning Algorithms for Smartphones in Typical Application Scenarios Min He, Tsinghua University

12:15 p.m. – 1:15 p.m., Buffet Lunch in Exhibit Hall • 1:15 p.m. – 1:45 p.m., Free Time in Exhibit Hall

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