Overview of Galileo System (original) (raw)
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Acta Astronautica, 2004
This paper presents a brief description of the GALILEO services and summarizes the main performance parameters. The current status of the system architecture deÿnition is presented in a concise overall view on the various elements of the system and their functions with a main focus on the GALILEO ground segment.
The european satellite navigation system Galileo
Wuhan University Journal of Natural Sciences, 2003
This paper starts with a brief discussion of the Galileo project status and with a description of the present Galileo architecture (space segment, ground segment, user segment). It focuses on explaining special features compared to the American GPS system. The presentation of the user segment comprises a discussion of the actual Galileo signal structure. The Galileo carder frequency, modulation scheme and data rate of all 10 navigation signals are described as well as parameters of the search and rescue service. The navigation signals are used to realize three types of open services, the safety of life service, two types of commercial services and the public regulated service. The signal performance in terms of the pseudorange code error due to thermal noise and multipath is discussed as well as interference to and from other radionavigation services broadcasting in the F_,5 and E6 frequency band. The interoperability and compatibility of Galileo and GPS is realized by a properly chosen signal structures in E5a/L5 and E2-L1-E1 and compatible geodetic and time reference frames. Some new results on reciprocal GPS/Galileo signal degradation due to signal overlay are presented as well as basic requirements on the Galileo code sequences.
The Galileo Project and Scientific Applications
A short overview of the European Satellite navigation programme Galileo and its current state of development is provided, followed by a brief description of scientific applications of navigation signals in general and the expectations for Galileo in particular.
Experimenting Galileo on Board the International Space Station
2016
The SCaN Testbed is an advanced integrated communications system and laboratory facility installed on the International Space Station (ISS) in 2012. The testbed incorporates a set of new generation of Software Defined Radio (SDR) technologies intended to allow researchers to develop, test, and demonstrate new communications, networking, and navigation capabilities in the actual environment of space. Qascom, in cooperation with ESA and NASA, is designing a Software Defined Radio GalileoGPS Receiver capable to provide accurate positioning and timing to be installed on the ISS SCaN Testbed. The GalileoGPS waveform will be operated in the JPL SDR that is constituted by several hardware components that can be used for experimentations in L-Band and S-Band. The JPL SDR includes an L-Band Dorne Margolin antenna mounted onto a choke ring. The antenna is connected to a radio front end capable to provide one bit samples for the three GNSS frequencies (L1, L2 and L5) at 38 MHz, exploiting the ...
Galileo Has – First Performance Tests During Its Initial Phase of Operation
Aviation and Security Issues, 2023
Galileo High Accuracy Service (HAS) became available in January 2023. As declared, in its final operational capability, it should be able to provide to users the Precise Point Positioning (PPP) at horizontal accuracy level better than 20 cm in real-time with 95% confidence globally. At the moment Galileo HAS works in its initial phase of operation with some limitations regarding its availability, convergence time and accuracy but gives the chance to observe the performance of positioning tool at the accuracy level which was available before by using differential measurement only. Galileo HAS PPP, free of charge and based only on satellite signals delivered by nominal Galileo constellation is unique in its kind between various GNSS positioning modes. This article presents the results of first, preliminary tests on Galileo HAS performance conducted in July 2023 in Gdynia, Poland. The field tests were conducted with Galileo HAS capable receiver in static conditions and focused on the verification the declared service performance in the real positioning scenarios. Additionally, the Galileo HAS PPP performance was compared with the simultaneous performance of other GNSS positioning methods such as EGNOS, DGPS, dual frequency GPS+Galileo or dual frequency GPS and dual frequency Galileo. This first experiences with Galileo HAS positioning should show all potential users what performance level can be achieved with this new, unique in its kind GNSS positioning method at the present state of its implementation.
Simulation of a Feasible Galileo System Operating in L1 and E5 Bands
Galileo is the program that has been launched by the European Union for the purpose of building a Global Navigation Satellite System (GNSS) for serving civilians and to exist under civil control. Our project combines many previous researched scenarios for Galileo system to a final one, which has been simulated and adjusted to meet the most demanding standards (of proposed GNSS services). The final simulated scenario is consisted of 30 (27+3 spare) satellites allocated in 3 orbital planes.
The joint ESA/NASA Galileo/GPS Receiver Onboard the ISS – The GARISS Project
Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), 2019
is the Head of the Navigation Support Office at ESA's European Space Operations Center (ESOC) in Darmstadt, Germany. Previously, he worked at the European GNSS Authority (GSA) as the Head of System Evolutions for Galileo and EGNOS and he also worked for the European Commission in the Galileo Unit. For over 25 years, he has worked on activities related to the use of GPS/GNSS for space applications. He holds a master and doctoral degree in aerospace engineering from the Technical University of Berlin, Germany. Erik Schönemann has joint the Navigation Support Office at ESA/ESOC in 2006 as a contractor and became permanent staff in 2015. He is involved in Galileo studies since the launch of the first Galileo validation satellite GIOVE-A and is the technical manager of the Galileo Reference Service Provider (GRSP). He is involved in the coordination of ESA's reference frame activities and contribution to International Services like ILRS, IGS and UTC. Erik Schönemann holds a master and a doctoral degree in Geodesy from the Technical University of Darmstadt, Germany. Francesco Gini is a Navigation Engineer at the Navigation Support Office (OPS-GN) at the European Space Operations Center (ESOC) of ESA. He is responsible for the Space Service Volume (SSV) and Precise Orbit Determination (POD) related activities. He received his PhD in Astronautics and Satellite Sciences at the University of Padova, Italy in 2014 and since then he has been working in ESOC. Michiel Otten is a Navigation Engineer at the Navigation Support Office (OPS-GN) at the European Space Operations Center (ESOC) of ESA. He is responsible for the LEO POD activities and the International Doris Service (IDS) Analysis Centre activities. He received his Master degree in Aerospace Engineering at the Delft University of Technology in 2001 and since then he has been working at ESOC. Pietro Giordano holds a Master in Telecommunication Engineering from University of Padua (Italy) and a Second Level specializing Master in Navigation and Related Application from University of Torino (Italy). He worked in Thales Alenia Space (Italy) as GNSS receiver Engineer before joining ESA in 2009, where he worked first as GNSS receiver support to Galileo project and later as GNSS Security Engineer in the Galileo project. Currently he is in charge of multiple activities related with space GNSS receivers and R&D in space GNSS receiver technology such as Technical Officer for POD receiver in Sentinel, Proba3 missions, development of GNSS space borne receivers for real time on-board POD in CubeSats, development of LEO PNT payloads, support for definition of new AGGA chip and development of GNSS space borne receivers for lunar missions.
Galileo in Maritime Applications
2005
The past decade has seen the continued growth of GPS and its many different applications. The European Union and the European Space Agency has announced the development of the European Global Navigation Satellite System – Galileo. Clearly acceptance of additional satellite systems into markets that successfully use GPS will require identification of those key areas where Galileo is capable of providing added-value, either standalone or more likely as a component of an overall integrated suite of navigation systems. These key areas are often termed the key differentiators for Galileo. This paper introduces three projects; GALEWAT, MARGAL and GEM. The GALEWAT project is fully funded by the European Space Agency (ESA), while MARGAL is 50% co-funded and GEM fully funded by the European Union (EU) through the Sixth Framework Research and Development Programme which is being administered on behalf of the EU by the Galileo Joint Undertaking (GJU). The overall aim of all three projects is t...
Contact!-First acquisition and tracking of IOV Galileo signals
INSIDE GNSS, 2012
Europe's GNSS program-Galileo-entered a new phase of development with the recent launch of two in-orbit validation satellites, which comprise the first elements of the system's full operational constellation. In this article, a team of italian researchers present the initial results of their analysis of the Galileo signals