What is EGNOS? How does it work?
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Presented by Jean-Marc Piéplu (EGNOS Exploitation Program Manager) in Toulouse - France at EGNOS flight event, 6-7 May 2015
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Collaborative evaLuation Of border Surveillance Technologies in maritime Environment bY pre-operational validation of innovativE solutions
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As the first Pre-Operational Validation project in FP7 security theme, the Project pursued the validation of innovative services (improved detection though Passive Radar DVB-T and SAT Images, Enhanced Command and Control Functionalities and services, extended range cost-effective surveillance through MRI Aircraft integrating Videos and Tracks, SAT Communications) applicable to the surveillance of the EU Maritime Borders in real operational environment following the Common Application of Surveillance Tools concept, established by EUROSUR.
The project was divided into 2 Lots, the first of which managed by Leonardo through the “Union Temporal the Empresa” with INDRA. Results of the experimental campaigns are used to orient decision makers and agencies’ buyers in the procurement process to get cost effective solutions to manage Mediterranean borders.
El programa Galileo de la Agencia Espacial Europea
Presentación de Javier Benedicto, Jefe del Proyecto Galileo en la Agencia Espacial Europa, en el 31º Encuentro de de la Economía Digital y las Telecomunicaciones: La realidad digital de España, celebrado en la UIMP en septiembre de 2017
Galileo: System and Applications
Galileo is Europe's initiative for a global satellite navigation system providing precise positioning under civilian control. It will be interoperable with GPS and GLONASS, consisting of 30 satellites plus spares when complete. Precise timing from Galileo's onboard atomic clocks, accurate to 1 second every 3 million years, will support applications like power grids, financial networks, UAVs, autonomous vehicles, and emergency response.
Galileo - The European GNSS
Galileo is the European GNSS constellation and it contributes to the user positioning adding more satellites, which number directly impacts on the Dilution of precision (DOP), or geometric dilution of precision (GDOP). It is a term used in satellite navigation and geomatics engineering to specify the additional multiplicative effect of navigation satellite geometry on positional measurement precision.
Sogei2014 lisi v01
"EGNOS and Galileo: towards an Integrated European PNT Infrastructure", presentation at the International Workshop on "GNSS technologies advances in a multi-constellation framework“, SOGEI, Roma, 26 September 2014
H2020 Status of Galileo and Egnos
Since last year:
THIRD SUCCESSFUL QUAD LAUNCH in July 2018 with ARIANE V
26 Satellites in orbit
Initial SERVICES beyond expectation
New procurement initiated for subsequent satellites
Commercial Service re-baselined
Emergency Warning Service under definition
Launch of User Consultation Platform
Towards Galileo 2nd GENERATION decision
ZONeSEC final pilot demonstration - invitation and agenda
We are preparing the Final Demonstration of the ZONeSEC system! You are heartily welcome to check out the details of the event (see official invitation below), which will be hosted by Attikes Diadromes (highway operator) in Athens, on 25th and 26th October. If you're interested in joining us, please send a short description of your expertise and motivation for attending the event to Lavinia Cadar at cadar@crisisplan.nl by Monday 24th EOB. You might be selected for one of the free invitations available (i.e. travel and accommodation costs covered by the ZONeSEC consortium)!
EENA 2018 - GRALLE, a EU initiative for a Galileo-based Emergency Warning Sys...
EENA 2018 - GRALLE, a EU initiative for a Galileo-based Emergency Warning Sys...EENA (European Emergency Number Association)
GRALLE is a EU-funded initiative to develop a Galileo-based emergency warning system. It would use Galileo satellites to broadcast alerts directly to mobile apps, providing reliable and low-latency warnings without an internet connection. The consortium developing GRALLE has completed requirements and signal design. They are now implementing a demonstrator and plan tests in 2017, with the goal of full operations starting in 2023.The SMAT Project: an Advanced Environment Monitoring System
The SMAT Project: an Advanced Environment Monitoring System , from Phase 1 to Phase 2- Aerospace and Defence Meetings 2013
Similar to What is EGNOS? How does it work? (20)
Space & Security Conference - EGNOS: Present and Future Services
Space & Security Conference - EGNOS: Present and Future Services
Galileo concept of operations, first iov leop and initial operations
Galileo concept of operations, first iov leop and initial operations
EGNOS growing market in Agriculture and fostering new opportunities in Mapping
EGNOS growing market in Agriculture and fostering new opportunities in Mapping
Companies which attended Fundamental Elements Info Day
Companies which attended Fundamental Elements Info Day
El programa Galileo de la Agencia Espacial Europea
El programa Galileo de la Agencia Espacial Europea
ZONeSEC final pilot demonstration - invitation and agenda
ZONeSEC final pilot demonstration - invitation and agenda
EENA 2018 - GRALLE, a EU initiative for a Galileo-based Emergency Warning Sys...
EENA 2018 - GRALLE, a EU initiative for a Galileo-based Emergency Warning Sys...
The SMAT Project: an Advanced Environment Monitoring System
The SMAT Project: an Advanced Environment Monitoring System
More from The European GNSS Agency (GSA)
EGNOS service for payment and liability critical road applications
Presentation from the webinar on the Invitation to tender: EGNOS service for payment and liability-critical road applications. More information about the tender: https://www.gsa.europa.eu/newsroom/news/invitation-tender-egnos-service-payment-and-liability-critical-road-applications
Enhanced GNSS Receiver/User Terminal - Webinar (Fundamental Elements Call)
Enhanced GNSS Receiver/User Terminal - Webinar (Fundamental Elements Call)The European GNSS Agency (GSA)
On 9 October 2019, a webinar on the Fundamental Elements Call “Enhanced GNSS Receiver/User Terminal” was held to provide applicants with additional details on the proposal preparation.The Regulatory Perspective Towards GNSS Adoption in Rail- ERA
The document discusses the regulatory perspective on adopting GNSS (global navigation satellite systems) in rail systems. It notes that rail needs to innovate to remain competitive and that GNSS can help decrease costs and increase efficiency by providing train positioning without the need for trackside infrastructure. However, it also discusses technical challenges for GNSS in rail like signal interference and obscured signals. The document emphasizes that innovation and interoperability are not contradictory in rail, and that a compatible evolution of onboard systems is needed while ensuring safety throughout the innovation process.
Smart cargo
The document summarizes a project by Rail Cargo Group to outfit rail cargo wagons with GPS and Galileo devices by the end of 2020, calling the wagons "smart things." The first GPS device was mounted on March 15, 2019. An IoT platform will integrate location data to enable use cases like tracking cargo locations, optimizing maintenance schedules, and providing customers with more information. Improving positioning accuracy in challenging rail environments can help boost efficiency in rail logistics.
DGNSS & Autonomous Rail Transport Mobility - Optimization
The document discusses digital mapping and tracking technologies for rail transport. It describes how detailed digital maps of railways can help enforce safety rules and how tracking assets digitally can alert authorities if anything exits unauthorized. It also discusses how movement and coupling optimization can minimize accident risks and costs through predictive maintenance and automated train driving. The technologies aim to remove human error from logistics operations and reduce rail incident risks.
GSA project roadmap summary and next steps
The document discusses coordinating R&D efforts towards including European GNSS signals within ERTMS rail signalling to: 1) satisfy end users by providing an interoperable and stable solution; 2) reduce ERTMS capital and operational costs; and 3) improve flexibility and attractiveness of ERTMS. It also describes gathering user requirements to feed into Galileo and EGNOS evolutions and promoting the use of E-GNSS for non-safety applications like cargo tracking and predictive maintenance.
X2RAIL2 and other S2R projects
The document discusses antitrust guidelines for a meeting between rail industry competitors on the X2Rail-2 and other Shift2Rail projects. It notes that while some collaboration is legal and beneficial, agreements between competitors that restrict competition are prohibited. It provides guidance on avoiding inappropriate topics of discussion like prices, production levels, customer relationships, costs and other sensitive business information. Participants are advised to adhere strictly to the published agenda and not use meetings to reach agreements that impair independent business judgment or competition.
ESA stems system suitability study for train positioning using ERTMS
This document summarizes a system suitability study called STEMS that assessed the use of GNSS (global navigation satellite systems) for train positioning in the European Rail Traffic Management System (ERTMS). The study was led by NSL and aimed to: (1) review requirements for virtual balise detection using GNSS in ERTMS; (2) assess the suitability of current SBAS (satellite-based augmentation systems) for ERTMS with virtual balise detection; and (3) propose a methodology for a safety case for SBAS use in ERTMS virtual balise applications. The study found that SBAS can provide fault detection and improved accuracy for train positioning compared to GNSS alone.
Sia GNSS contribution to rail asset management
The document describes the SIA project which aims to develop four new services to provide prognostic health information for railway assets. The services will integrate sensors on vehicles to monitor wheel-rail and pantograph-catenary interaction, a data hub for positioning and communications, degradation models, and a visualization platform. This will allow early detection of issues like wheel flats or broken rails to support maintenance planning by infrastructure managers and train operating companies.
ERSAT Projects – E-GNSS based solution for Low density lines and its certific...
ERSAT Projects – E-GNSS based solution for Low density lines and its certific...The European GNSS Agency (GSA)
The ERSAT project aims to develop and certify an ERTMS solution using GNSS technology for low-density rail lines in Italy. The goals are to reduce maintenance costs by 30% by replacing older signaling systems with ERTMS, and deploy ERTMS nationwide by 2035. ERSAT has developed and tested satellite-based ERTMS technologies and defined a 2017-2023 master plan to activate a first commercial line by 2020 using public augmentation services, upgrade an existing line, and standardize solutions through European cooperation. Certification guidelines have been established and experts are involved to certify the satellite-based ERTMS solution for commercial operations.STARS Project – GNSS performances, rail environment characterisation and conc...
STARS Project – GNSS performances, rail environment characterisation and conc...The European GNSS Agency (GSA)
The STARS project aimed to characterize railway environments to allow full implementation of GNSS in safety critical rail applications. It developed a methodology for field measurements, conducted an unprecedented measurement campaign at diverse locations, and created tools to analyze environmental factors impacting GNSS performance. The project also investigated economic impacts, ERTMS requirements, and the potential for evolved EGNOS services to fully support safety critical rail applications. STARS provided conclusions and recommendations to support further GNSS development in rail.Integrating GNSS within another safety critical transport mode
Presentation by Luc Tytgat, Strategy and Safety Management Director, EASA.
Space 4 Rail Event - Gnss for aviation
Six challenges to ensure digital transformation
This Smart Region ambition of the regional council is declined into five operational pillars driving our action in terms of digital transformation of territories and organizations.
Autonomous emergency manoeuvring
Development and evaluation of systems built-in or to be used by trucks for secure road
transport of (dangerous) goods. Preventing trucks and transport of goods to be misused for other purposes such as terror attacks
Sensor observation of urban life
WHY SOUL? AIRBORNE DISEASES! 600 Million
People with respiratory diseases and are increasing every year
200 Billion €/year
Direct and indirect costs
25% have airborne diseases
7.8 Million Children Reported respiratory allergies
Testbed in aarhus for precision positioning and autonomous systems (tapas)
Testbed in aarhus for precision positioning and autonomous systems (tapas)The European GNSS Agency (GSA)
TAPAS
• Developed in collaboration between SDFE, DTU Space and City of Aarhus
• An open research and development platform for precise positioning
• TAPAS takes the research out of the laboratory and offers test opportunities in a reality scenario in a densely populated urban areaCooperative its and advanced location and navigation solution for signalling ...
Cooperative its and advanced location and navigation solution for signalling ...The European GNSS Agency (GSA)
ITS (Intelligent Transportation Systems): add information and communications technology to transport infrastructures and vehicles in an effort to improve their safety, reliability, efficiency and quality.Cloudy boss
Our core solution to ERP’s woes is Next , the world’s first eDLT solution platform... an hyper-scalable, secure, and powerful solution to manage the complex ecosystems of nodes and centralized organisations, that delivers far more functionality than the most sophisticated ERP system on the planet.
French SmartPort
The port of Marseille Fos handled 81 million tons of cargo in 2017 and is a major economic engine for the local region, generating 3.5 billion euros in added value and over 41,500 port jobs. The port has initiated the Brain Port Community, a collaborative project between academic and industry partners, to promote digital transformation and create new opportunities in the port and logistics sector through innovation. The Brain Port Community focuses on projects in areas like automation, big data, logistics, energy, and the environment to make the port more intelligent, efficient, green and innovative.
Make your logistic assets smarter exploit their full potential with the inter...
Make your logistic assets smarter exploit their full potential with the inter...The European GNSS Agency (GSA)
More than 9 billion logistic assets carrying goods all over the world. Space technology to enhance our MAG.More from The European GNSS Agency (GSA) (20)
EGNOS service for payment and liability critical road applications
EGNOS service for payment and liability critical road applications
Enhanced GNSS Receiver/User Terminal - Webinar (Fundamental Elements Call)
Enhanced GNSS Receiver/User Terminal - Webinar (Fundamental Elements Call)
The Regulatory Perspective Towards GNSS Adoption in Rail- ERA
The Regulatory Perspective Towards GNSS Adoption in Rail- ERA
DGNSS & Autonomous Rail Transport Mobility - Optimization
DGNSS & Autonomous Rail Transport Mobility - Optimization
ESA stems system suitability study for train positioning using ERTMS
ESA stems system suitability study for train positioning using ERTMS
ERSAT Projects – E-GNSS based solution for Low density lines and its certific...
ERSAT Projects – E-GNSS based solution for Low density lines and its certific...
STARS Project – GNSS performances, rail environment characterisation and conc...
STARS Project – GNSS performances, rail environment characterisation and conc...
Integrating GNSS within another safety critical transport mode
Integrating GNSS within another safety critical transport mode
Testbed in aarhus for precision positioning and autonomous systems (tapas)
Testbed in aarhus for precision positioning and autonomous systems (tapas)
Cooperative its and advanced location and navigation solution for signalling ...
Cooperative its and advanced location and navigation solution for signalling ...
Make your logistic assets smarter exploit their full potential with the inter...
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LLM Fine Tuning with QLoRA Cassandra Lunch 4, presented by Anant
Slides for the 4th Presentation on LLM Fine-Tuning with QLoRA Presented by Anant, featuring DataStax Astra
Embedded machine learning-based road conditions and driving behavior monitoring
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
学校原版美国波士顿大学毕业证学历学位证书原版一模一样
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
The guide then proceeds to explain how to set up the SSH service within the WSL environment, an integral part of the process. Alongside this, it also provides detailed instructions on how to modify the inbound rules of the Windows firewall to facilitate the process, ensuring that there are no connectivity issues that could potentially hinder the debugging process.
The document further emphasizes on the importance of checking the connection between the Windows and WSL environments, providing instructions on how to ensure that the connection is optimal and ready for remote debugging.
It also offers an in-depth guide on how to configure the WSL interpreter and files within the PyCharm environment. This is essential for ensuring that the debugging process is set up correctly and that the program can be run effectively within the WSL terminal.
Additionally, the document provides guidance on how to set up breakpoints for debugging, a fundamental aspect of the debugging process which allows the developer to stop the execution of their code at certain points and inspect their program at those stages.
Finally, the document concludes by providing a link to a reference blog. This blog offers additional information and guidance on configuring the remote Python interpreter in PyCharm, providing the reader with a well-rounded understanding of the process.
International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Understanding Inductive Bias in Machine Learning
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressions
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ACEP Magazine edition 4th launched on 05.06.2024
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一比一原版(CalArts毕业证)加利福尼亚艺术学院毕业证如何办理
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(诚招代理)办理国外高校毕业证成绩单文凭学位证,真实使馆公证（留学回国人员证明）真实留信网认证国外学历学位认证雅思代考国外学校代申请名校保录开请假条改GPA改成绩ID卡
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CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
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Generative AI leverages algorithms to create various forms of content
Generative AI leverages algorithms to create various forms of content
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
Introduction to AI Safety (public presentation).pptx
Introduction to AI Safety (public presentation).pptx
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
What is EGNOS? How does it work?
- 1. WHAT IS EGNOS ? HOW DOES IT WORK ? Toulouse, 6-7 May 2015 Jean-Marc Piéplu EGNOS Exploitation Program Manager EGNOS flight event
- 2. 2 EGNOS (European Geostationary Navigation Overlay Service) Navigation Land Earth Station (NLES): …uplinks error corrections to EGNOS satellites… GPS (and Galileo) Satellite Constellation Ranging and Integrity Monitoring Stations (RIMS) : …receive GPS data & send to MCC… Mission Control Centre (MCC) …processes GPS data to determine errors… EGNOS Geo-stationary Satellite …relays error corrections to users… HPL VPL HPL/VPL: Protection levels with integrity better than 1/10 Million per 150 sec
- 3. EGNOS Operational System: EGNOS V2 – 38 monitoring stations (RIMS) deployed in Europe and North Africa – 6 Uplink stations (NLES) deployed in Belgium, Luxembourg, France, Italy, Nederland – 2 main Mission Control Centres (Madrid, Rome) – 1 Engineering & Tests Center (Toulouse) – 1 Service Provision Centre (Madrid)
- 4. EGNOS Ground Infrastructure GEO Uplink Station (NLES) Luxembourg Monitoring Station (RIMS) Svalbard Monitoring Station (RIMS) Azores
- 5. EGNOS Safety Of Life Service performances Monday 4 May 2015
- 6. EGNOS Exploitation: organisation European Commission Program supervision European GNSS Agency (GSA) Program management European Space Agency (ESA) System Evolutions EGNOS Service Provider (ESSP) Service Provision Operations, Maintenance European Aviation Safety Agency (EASA) Safety oversight Delegation Industry V2 (development) Working Arrangement Industry (maintenance) Industry V3 (development) Sites Operations Communications Service Contract Certification Process
- 7. EGNOS and other SBAS: Next Generation Single frequency GPS-only WAAS+EGNOS+MSAS Dual-Frequency GPS-only Extension scenario Dual-Frequency GPS-Galileo Extension scenario