This paper proposes a distributed algorithm for the maintenance of topology of a network in a MANET (Mobile Ad-hoc Network). In this algorithm, it is assumed that every node possesses GPS receiver. Nodes receive the position and velocity information of their neighbors at the end of each beacon interval through GPS. Next, these nodes check whether a certain condition is violated or not. A node c...

There are some fundamental limitations on positioning accuracy using satellite navigation technique. Several sources of errors limit the accuracy of GNSS (Global Navigation Satellite System) positioning. The errors due to the earth’s atmosphere have the largest value and must be significantly reduced in order to achieve more precise positioning results. The GNSS-based determination of the posit...

This paper deals with the study of information technologies and approaches to solve problems related to the automation of selective monitoring on the base of university training and research satellite receiver teleport. Indeed, the utilization of satellite TV technologies at all scientific research and educational process stages could be called a new educational paradigm that has a huge potenti...

In this contribution GPS statistics are presented for the case that the relative receiver-satellite geometry is included in the single baseline model and for the case that the relative receiver-satellite geometry is excluded. It is shown that the statistics are linked through a particular form of a phased adjustment. Based on the stepwise approach of a phased adjustment, the impact of using sat...

With the development of service robots and with the emerging concept of the ubiquitous world, localization of a mobile robot has become a popular issue. Even though several localization schemes have been previously, none of them is free from the economical constraints placed on commercial robots. To implement a real time commercial localization system, a new absolute position estimation method ...

Using GPS system for positioning is subject to several sources of errors: ionosphere and troposphere delays, signal multi-path, number of visible satellites, satellite geometry/shading... A typical civilian GPS receiver provides 6-12 meters accuracy, depending on number of satellites available. This accuracy can be reduced to 1m by using a DGPS (Differential GPS) system which employs a second r...

.Abstract – The goal of this research was to evaluate the potential of homopolar electrodynamic magnetic bearings for flywheel energy storage systems (FESSs). The primary target was a FESS for Low Earth Orbit (LEO) satellites, however, the design can also be easily adapted for Earth-based applications. The main advantages of Homopolar Electrodynamic Bearings compared to more conventional Active...