Familiar wayfinders communicate route directions in a granular manner. In contrast to current navigation services, the detail of the description is adapted to the relation between the start and the target of the route. References to elements of the city are select in a manner leading to a referring expression respecting the conversation maxims formulated by Paul Grice (1975, 1989). We demonstra...

BEIDOU AND GPS DUAL CONSTELLATION VECTOR TRACKING DURING IONOSPHERE SCINTILLATION AT EQUATORIAL REGION

Social navigation exploits social practices to help users navigate and explore system functionality. In a wireless world, people move around, meet others and experience places and situations. Those activities may be recorded up and presented to others through their wireless devices, and serve in social navigation. One design challenge is how to deal with the technical limits and ‘seams’ of such...

This algorithm uses the GPS satellite system for navigation. It is an innovative algorithm, because it employs only the Doppler measurements and starts with a known initial location of the receiver. Initially, this algorithm was developed for fixed point GPS transmitters. In the paper we have successfully attempted to adapt this algorithm for moving satellites. This algorithm appears to perform...

A common way to navigate an information space in the real world is with help of other people, e.g. instead of looking at my map I ask another person for the direction of the place I want to go to. This communication with other agents (human o r artificial) to navigate an information space is what we call social navigation. In this paper social navigation is examined; how does it work; who uses ...

This article gives an in-depth analysis of the experimental data of the TK-1G sounding rocket installed with the satellite navigation system. It turns out that the data acquisition rate of the rocket sonde is high, making the collection of complete trajectory and meteorological data possible. By comparing the rocket sonde measurements with those obtained by virtue of other methods, we find that...

In order to provide better navigation service for a wide range of applications, modernized global navigation satellite systems (GNSS) employs increasingly advanced and complicated techniques in modulation and multiplexing of signals. This trend correspondingly increases the complexity of signal despreading at the receiver when matched receiving is used. Considering the numerous low-end receiver...