The notion of the extremal length and the module of families of curves has been studied extensively and has given rise to a lot of applications to complex analysis and the potential theory. In particular, the coincidence of the p-module and the p-capacity plays an important role. We consider this problem on the Carnot group. The Carnot group G is a simply connected nilpotent Lie group equipped ...

Rendezvous and docking/berthing are key manoeuvers for various missions [1]. In those rendezvous phases where the accuracy of absolute navigation (e.g. by satellite navigation services like GPS or GLONASS) is no longer sufficient, sensors have to provide information about the relative position of active vehicle (chaser) and passive vehicle (target). Satellite navigation (differential GPS), radi...

The navigation problem associated with terminal aircraft guidance refers to position determination of an individual vehicle with respect to some point local to the environment as is the case with aircraft landing systems. This paper presents results for a relative navigation filter that achieves CAT3-level precision from a customized navigation satellite receiver's data message and the NORAD SD...

With the appearance of such satellite systems as GPS, GLONASS, Galileo, and others, the total electron content TEC measured by means of navigational satellites became a key parameter characterizing a state of the ionized space. In turn, functioning of navigational and telecommunication systems needs models of TEC for an estimation of accuracy of positioning, for the short-term and long-term pre...

We present results of adaptive canceller experiments at the Rapid Prototyping Array which compare the quality of interference suppression achieved in the voltage and power domains. It is shown that if the optimal complex weights used to model the interference are stationary over the length of the time average, then the same level of suppression is achieved. A limitation of both methods is that ...

This paper presents the status and perspective of operative Global Navigation Satellite Systems (GNSS): Global Positioning System (GPS), developed in United States; ГЛОбальная НАвигационная Спутниковая Система (GLONASS), developed in Russia; GALILEO system, which is under developing by European Union and Chinese COMPASS system. The analysis of results and achievements was provided by the partic...