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Satellite Navigation has become a keystone for the development of Europe and its citizens. It is then essential to provide adequate educational programmes so to ensure a prepared workforce for the GNSS sector in Europe. In this context, ESA has launched a complete Satellite Navigation Educational program, called EDUNAV, aiming at providing up-to-date GNSS based educational material and educational...
The use of GNSS space receivers for autonomous orbit determination is receiving increasing interest due to the important economical and operational benefits made possible by the reduced on-ground operations and the improved pointing performance when associated to one Star Tracker. However, the exploitation of GNSS for navigating satellites in orbits beyond the GNSS constellations has not yet gained...
This article presents a methodology related to the computation of civil aviation acquisition, tracking and data demodulation thresholds adapted to the case of Galileo E1 OS/SoL signal. These thresholds are compared against worst case link budgets representing operational scenarios. It is shown that these thresholds provide a positive margin although these theoretical results would probably require...
This paper presents the key elements of the next generation of miniaturised GNSS space receivers compatible with the new and improved GNSS signals from Galileo and modernized GPS. A quick review of applications like Precise Orbit Determination (POD) and Radio Occultation (RO) is provided together with the performance achieved in current satellites like MetOp and GOCE and that expected in future ESA...
With Galileo, a satellite navigation system will be available that outperforms the current GPS and Glonass systems in terms of technical features, services and reliability. For testing and validation of Galileo-based applications two terrestrial test beds are currently being installed, where the future Galileo satellite navigation system can be used already now. The locations of these installations...
In a scenario in which several GNSS systems, GPS, Galileo, GLONASS, COMPASS, QZSS, are planning to coexist in the same frequency band, spectra/signal structure management and relative power levels are the main instruments to counteract the possible impact of intersystem interference, and the ability to increase the transmit power on individual signal components from GNSSs system providers has become...
This paper presents a new low cost GNSS Software (SW) receiver for Microsatellites. TES Electronic Solutions (Bruz, FRANCE) has been chosen by CNES for developing and manufacturing this equipment which should be tested on board the scientific microsatellites named TARANIS and MICROSCOPE that will be launched in 2013 and 2014. The GNSS receiver under development is a high-performance equipment specially...
The number of Satellite Services have increased tremendously during the last years: although initially driven only the military applications, commercial automotive applications collected the mass market attention in the recent years. Nowadays, these satellite services are mainly used for voice, data, internet, and tracking applications. Vehicles are increasingly being equipped with on-board electronic...
“INDOOR” is a German research project for providing a combined outdoor/indoor navigation capability for location based services of security-sensitive applications (SAR) as well as for important professional logistic or tracking applications, e.g. asset/child tracking. The project consortium is built of nine partners from industry, research institutes and universities with IFEN GmbH being the coordinator...
Satellite navigation systems GNSS are used widely for many commercial and military application for a long period. Usually the position measurement accuracy is of a major concern. However in safety critical applications the further qualities as availability, continuity and integrity becomes also important. In this paper the mentioned characteristics of the GNSS are adressed and GPS positioning deficiencies...
Today's Global Navigation Satellite System (GNSS) receivers predominantly utilize hardware based digital signal processing. This approach generally provides high performance and low power consumption GNSS receivers but on the other hand limits the flexibility as the receiver functionality is fixed. The aim of this paper is to present an overview on the ipexSR real-time GNSS software receiver developed...
This paper describes a generalisation of the aeronautical GNSS Space Based Augmentation System (SBAS) air interface, in a true worldwide multimodal standard named Universal S-BAS. Examples of usages of this multifrequency future standard are presented in the area of science and precise positioning, timing, security, robust positioning, maritime and reflectometry applications.
The Galileo system is the first satellite positioning and navigation system specifically designed for civil purposes. This system can not only provide global position service with high accuracy and high assurance, but also be compatible with GPS which guarantees us with great practicability and commercial benefit. This paper is focused on the study of Galileo system. First, it introduces the form...
The research discussed in this paper addresses the question of how to simulate realistic observables from current and pending Global Navigation Satellite Systems (GNSSs) in a way that is independent of the characteristics of specific systems. The generated observables can be used to predict future multi-GNSS performance and aid in the development of enhanced processing algorithms. This paper introduces...
As complexity is the feature of the structure of constellation and numerous satellites of multiple satellite integrated navigation system, on some special occasions or during some unusual period, selecting and recombining of constellation and satellites should be completed quickly. An innovational strategy was adopted to apply the fast algorithm of selecting satellites into the field of system modeling...
The success of navigation services in the mass consumer market will depend greatly on the service availability in urban canyons and moderate indoor environments. Just extending the observation period does not help when some satellite signals are stronger than others. This paper provides a new solution that arises with the introduction of the new two-tiered spreading codes for future Galileo and modernized...
Passive microwave sounding of global navigation system signals (GNSS) aka, GNSS radio occultation (GRO) produces measurements in the stratosphere and troposphere that contribute to two major societal benefits: monitoring climate and climate variability; and improving operational weather prediction. The high accuracy, precision and stability of GRO soundings make them ideal climate benchmark observations,...
The success of satellite navigation in the mass consumer market will depend greatly on its performance in deep urban and moderate indoor environments. The signal obstructions in these environments lead to low signal-to-noise ratios, which substantially degrade the positioning accuracy of GPS and Galileo receivers. New ranging techniques are required to increase the positioning accuracy to an acceptable...
Multi-satellite integrated navigation system, the research focus navigation field both at home and abroad, is expected to improve the precision of positioning service and security of the information. The paper starts with an introduction of the basic concept of multi-satellite navigation system. It then follows a literature review covering mainly the current status of foreign and domestic research...
The Galileo user receiver represents a key technology and is at the heart of the user segment. It is the main physical interface between the system and the user. It transforms the Galileo signal-in-space into services for the citizen. The majority of Galileo users will use the Galileo Open Service, utilising mass market receivers. A specific emphasis is brought to the development of the specific technologies...
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