Advanced Technologies for Position and Navigation under GNSS Signal Challenging or Denied Environments III

Dear Colleagues,

Position, Navigation and Time (PNT) information is fundamental to many applications, i.e., UAVs, smartphones, and autonomous driving vehicles. The Global Navigation Satellite System (GNSS) is dominant in providing the PNT with information due to its coverage and high accuracy. However, its signals are weak and it is vulnerable; multipath and None-Line-Of-Signals (NLOSs) signals are the major errors that occur with regard to the GNSS when it is applied in urban areas. Advanced signal processing methods are expected to enhance its resilience and assurance. In addition, the GNSS is vulnerable to interference and spoofing, which should be emphasized for unmanned systems and smart devices.

Apart from improving the resilience of the GNSS in signal-challenging environments, PNT information without the GNSS is critical for many applications, namely indoors, tunnels, underground, etc. Advanced technologies employing high-accuracy inertial sensors and timing devices, namely the MEMS Gyroscope, the atomic interferometer gyroscope, the nuclear magnetic resonance gyroscope, the chip scale atomic clock, etc., are key to supporting PNT in GNSS-denied environments. Multi-sensor integration is also a prospective solution. This Special Issue aims to provide a platform for researchers to publish innovative work addressing recent advances in position and navigation under GNSS signal-challenging or denied environments. Specifically, we invite contributions concerning the following topics:

• GNSS multipath, NLOS and spoofing identification, mitigation or correction;
• LiDAR/Visual SLAM;
• Indoor position with new technologies;
• Multi-sensor integration and fusion;
• Micro-Technology for Positioning, Navigation, and Timing;
• Cooperative navigation;
• RAIM and fault detection;
• RTK or PPP in urban areas.

Dr. Changhui Jiang
Dr. Yuwei Chen
Dr. Qian Meng
Dr. Panlong Wu
Dr. Bing Xu
Dr. Lianwu Guan
Dr. Wang Gao
Dr. Zeyu Li
Guest Editors

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• Advanced Technologies for Position and Navigation under GNSS Signal Challenging or Denied Environments II in Remote Sensing (19 articles)