In this paper, we present the results of a hierarchical SLAM/GPS/INS/WLFP sensor fusion to be used in navigation system devices. Due to low quality of the inertial sensors, even a short-term GPS failure can lower the integrated navigation performance significantly. In addition, in GPS denied environments, most navigation systems need a separate assisting resource, in order to increase the avail...

This report presents integrity monitoring and integration methods for an Inertial Measurement Unit (imu) and a gps receiver. The methods are applied to data from a Maxus sounding rocket used for microgravity research. It is crucial to determine the rocket position during launch to ensure a safe landing location. Today, the navigation relies on imu integration only. Involving a gps receiver enha...

Within the last few years navigation systems have started to conquer the market in the Western World. Especially in outdoor environments location based services play an important role for supporting the wayfinding process. Car drivers have started to trust in the information provided by car navigation systems and even pedestrians are gaining interest in reliable guiding instructions. Neverthele...

GPS tracklogs provide a valuable record of routes travelled. In this paper we describe initial experiments exploring the use of text information retrieval techniques for the location of similar trips from within a GPS tracklog. We performed the experiment on a dataset of 528 individual trips gathered over a seven month time period from a single user. The results of our preliminary study suggest...

Under the rapid development of satellite communication systems and satellite navigation systems, there is an urgent need to combine the two together in order to achieve location-based services, etc. Despite the long relationship history of navigation and communication, the two satellite systems are basically independent of each other. As a result, terminal size tends to be relatively large, and...

Landmarks provide the most predominant navigation cue for pedestrian navigation. Very few navigation data models in the geographical information science and transportation communities support modeling of landmarks and use of landmark-based route instructions for pedestrian navigation services. This article proposes a landmark-based pedestrian navigation data model to fill this gap. This data mo...

When a high-speed train is running in tunnel, the global navigation satellite system (GNSS) signal completely lost. Relying only on inertial (INS) composed of Micro-electromechanical Systems (MEMS) devices leads to large errors. To solve this problem, an integrated micro measurement unit (MIMU), odometer (ODO), and motion constraint (MC) tunnel method proposed. This first establishes model base...