Abstract Aside from the ionospheric total electron content (TEC) information, root-mean-square (RMS) maps are also provided as standard deviations of corresponding TEC errors in global (GIMs). As RMS commonly used accuracy indicator GIMs to optimize stochastic model precise point positioning algorithms, it is crucial importance investigate reliability involved different Ionospheric Associated A...

Background Sub-nanometer precision and accuracy plus high positioning bandwidth have made piezo nanopositioners essential for track profiling applications in spin-stand applications. However, (1) relentlessly advancing areal density requirements and (2) the advent of patterned media raise new issues for spin-stand integrators. These emerging needs require that the nanopositioner perform within ...

In order to meet the requirement of positioning accuracy of indoor mobile robot, an indoor localization method based on information fusion is proposed. Firstly,using the Radio frequency identification (RFID) location method to determine the approximate range of the mobile robot's position, in the scope of the current with visual positioning for robot pose information including location coordina...

Positioning, as a key component of context, has been a driving factor in the development of ubiquitous computing applications throughout the past two decades. However, the precision is limited to specific applications, the availability limited to the provider of specific services. Combining multiple methods allows to recalibrate each other by means of data fusion. A novel architecture processes...

The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The DualStage Actuator (DSA) proposed in this paper can replace the single actuator to achieve the high speed and high precision positioning by cooperative control. The relative model and control algorithm of motion traje...

In this paper we present a visual navigation system for retrieving untethered autonomous underwater vehicle (AW). The vision qstern guides the .4LV into a retriever which is a tethered underwater robot. The visual navigation modules include target searchin& line tracking, and positioning. The vision system is a dedicated parallel image processor composed of three T800 (Transputer). The processi...

This paper presents a review of four types of signal of opportunity (analogue/digital television TV, analogue/digital audio, Global System for Mobile Communications GSM, and Wi-Fi signals) and the implications of using these signals for navigation in terms of: i) problems that affect positioning, ii) exploiting them in dissimilar geographical regions of the world, and iii) positioning technique...