Thursday

Enhancing RTK Ambiguity Resolution in Urban Environments Using TD-CMC Screening

Jongbok Lee, Daniel Gerbeth, Maria Caamano, Chen Zhu, German Aerospace Center (DLR)

Session D3: Precise Positioning and its Integrity: Architecture and Algorithm Design, Thursday, September 17, 10:40 a.m.

Presenter: Jongbok Lee

  • Temporal TD-CMC screening is used to identify rapidly varying code–carrier inconsistencies in urban GNSS measurements.
  • The remaining code uncertainty is modeled using an elevation-dependent residual covariance.
  • The combined approach improves RTK ambiguity-resolution robustness in controlled simulations and real UAV data.

Uncertainty Analysis of Landmark-Based Visual Navigation for Urban Air Mobility using a Virtual Testbed

Young-Hee Lee, Chen Zhu, and Jan Giedl, German Aerospace Center (DLR)

Session A4: Multi-Sensor PNT Optimization: Algorithms for Efficiency and Trustworthiness, Thursday, September 17, 02:58 p.m.

Presenter: Young-Hee Lee

  • Analysis of positioning accuracy and error-bounding performance for landmark-based visual navigation in urban air mobility systems.
  • Designing a multi-marker layout to improve the poor geometry and implementing it within a virtual testbed.
  • System demonstration using the realistic datasets (including weather variations and erroneous image effects) generated in the virtual testbed.

Railway Localization with Magnetic Field Distortions: Calibration, Sensor Fusion, and Evaluation

Benjamin Siebler1, Andreas Lehner1, Benedikt Merk1, Stephan Sand1, U. D. Hanebeck2, 1 German Aerospace Center (DLR), 2 KIT

Session C4: Fielding Alternative Technologies in GNSS-Denied Environments 2, Thursday, September 17, 4:46 p.m.

Presenter: Benjamin Siebler

  • Fusion of odometer measurements with absolute position estimates obtained from the distorted Earth magnetic field.
  • Magnetic position estimation performs a simultaneous magnetometer calibration and outlier detection.
  • Sub-meter accuracy achieved during an evaluation over multiple runs on tracks in Berlin.

Blind Spoofing Detection and Jamming Mitigation for Resilient GNSS Array Receivers

Tobias Bambergs1, Marius Brachvogel1,2, Michael Meurer1,2, 1 German Aerospace Center (DLR), 2 RWTH Aachen University, Germany

Session D4: Robust Navigation Using Alternative Navigation Sensors and Solutions, Thursday, September 11, 4:23 p.m.

Presenter: Marius Brachvogel

  • Blind detection of spoofing and jamming signals by comparing spatial signatures found in the pre- and post-correlation domain.
  • Evaluation of the algorithm using raw signals recorded at the Jammertest 2025 in Norway.