IEEE Access Special Section: Positioning and Navigation in Challenging Environments

Positioning and navigation have been playing a great role in a variety of military and civilian applications and location-based services, especially due to the advent of advanced information and communication technologies and continuous performance enhancement and modernization of the four global navigation satellite systems (GNSS). Although great progress and many achievements have been made in positioning and navigation over the past few decades, there are a range of significant issues, especially in challenging environments, which need to be considered and suitable solutions are required.