Table of Contents

Original Articles

• Open Access

  Satellite Ephemeris Parameterization Methods to Support Lunar Positioning, Navigation, and Timing Services

  Marta Cortinovis, Keidai Iiyama, and Grace Gao

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.664; DOI: https://doi.org/10.33012/navi.664
• Open Access

  Galileo High Accuracy Service: Tests in Different Operational Conditions

  Luca Cucchi, Sophie Damy, Ciro Gioia, Beatrice Motella, and Matteo Paonni

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.665; DOI: https://doi.org/10.33012/navi.665
• Open Access

  Improving GNSS Positioning Correction Using Deep Reinforcement Learning with an Adaptive Reward Augmentation Method

  Jianhao Tang, Zhenni Li, Kexian Hou, Peili Li, Haoli Zhao, Qianming Wang, Ming Liu, and Shengli Xie

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.667; DOI: https://doi.org/10.33012/navi.667
• Open Access

  Efficient Signal Quality Monitoring of GNSS Signals Disturbed by Evil Waveforms

  Fernando D. Nunes and Fernando M. G. Sousa

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.668; DOI: https://doi.org/10.33012/navi.668
• Open Access

  Tightly Coupled Graph Neural Network and Kalman Filter for Smartphone Positioning

  Adyasha Mohanty and Grace Gao

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.670; DOI: https://doi.org/10.33012/navi.670
• Open Access

  Timescale Realization with Linked Platforms for AltPNT

  Christopher Flood and Penina Axelrad

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.669; DOI: https://doi.org/10.33012/navi.669
• Open Access

  Feasibility Study of GBAS/INS and RRAIM for Airport Surface Movement Under Low-Visibility Conditions

  Junesol Song, Carl Milner, and Heekwon No

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.673; DOI: https://doi.org/10.33012/navi.673
• Open Access

  Addressing Inaccurate Phase Center Offsets in Precise Orbit Determination for Agile Satellite Missions

  Kevin Gutsche, Thomas Hobiger, and Stefan Winkler

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.671; DOI: https://doi.org/10.33012/navi.671
• Open Access

  Hybrid Carrier Tracking with Decoupled Local Filters in Multi-Frequency GNSS Receivers

  Rong Yang, Jihong Huang and Xingqun Zhan,

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.672; DOI: https://doi.org/10.33012/navi.672
• Open Access

  GNSS Meta-Signal Tracking Using a Bicomplex Kalman Filter

  Daniele Borio and Melania Susi

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.674; DOI: https://doi.org/10.33012/navi.674
• Open Access

  Improving the Prediction of GNSS Satellite Visibility in Urban Canyons Based on a Graph Transformer

  Shaolong Zheng, Kungan Zeng, Zhenni Li, Qianming Wang, Kan Xie, Ming Liu, and Shengli Xie

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.676; DOI: https://doi.org/10.33012/navi.676
• Open Access

  Cooperative Localization for GNSS-Denied Subterranean Navigation: A UAV–UGV Team Approach

  David Akhihiero, Uthman Olawoye, Shounak Das, and Jason Gross

  NAVIGATION: Journal of the Institute of Navigation December 2024, 71 (4) navi.677; DOI: https://doi.org/10.33012/navi.677