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EGNOS data access service (EDAS)
Service definition document : issue 2.2
Latest edition .
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The European Geostationary Navigation Overlay Service (EGNOS) provides an augmentation service to the Global Positioning System (GPS) Standard Positioning Service (SPS). Presently, EGNOS augments GPS using the L1 (1575.42 MHz) Coarse/ Acquisition (C/A) civilian signal function by providing correction data and integrity information for improving positioning, navigation and timing services over
Europe. EGNOS will augment both GPS and Galileo in the future using L1 and L5 (1176.45 MHz) frequencies. EGNOS provides three services: - Open Service (OS), freely available to any user; - Safety of Life (SoL) Service, that provides the most stringent level of signal-in-space performance to all Safety of Life user communities; - EGNOS Data Access Service (EDAS) for users who require access to specific GNSS data streams for the provision of added-value services, professional applications, commercial products, R&D, etc. EDAS provides ground-based access to EGNOS data, through a collection of services, which are accessible to registered users through the Internet and are oriented to users in different domains of application such as Location Based Services (LBS), a broad range of services in professional GNSS markets, Assisted-GNSS (A-GNSS) concepts, and related R&D activities. This document is the “EDAS Service Definition Document” (referred as EDAS SDD). It describes the EDAS system architecture and provides an overview of the information that is transmitted. A brief description of each EDAS Service is presented, along with its minimum performance. The EDAS SDD does not intend to give an exhaustive description of the message structure and data formats nor is it intended to be an Interface Control Document (ICD). A detailed documentary package covering EDAS data format(s) and protocol(s) technical information, along with other practical aspects, is provided to users upon registration through the EGNOS User Support Website ([RD-7], [RD-16], [RD-17], [RD-18]). The document also includes complementary high level information on EGNOS interfaces with users, as well as guidelines to register as EDAS user or to check the monthly EDAS services performance (publicly available). The observed performance of the EDAS services over a specified period is also given in Appendix A. This document does not address EGNOS Open Service (OS) nor EGNOS Safety of Life (SoL) service. Information about the EGNOS OS is available in a separate document called the “EGNOS Service Definition Document – Open Service” (EGNOS SDD OS – [RD-1]), whilst information regarding EGNOS SoL can be found in the “EGNOS Service Definition Document – Safety of Life Service” (EGNOS SDD SoL - [RD-2]).
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Published:
2019-09-04
Corporate author(s):
European GNSS Agency
(
EU body or agency
)
Themes:
Information technology and telecommunications
,
Space research
Subject:
information technology
,
information technology applications
,
satellite
,
satellite communications
,
satellite navigation
,
technical standard
PDF
ISSN
ISBN
978-92-9206-038-1
DOI
10.2878/729922
Catalogue number
TS-01-19-250-EN-N
PDF
ISBN
978-92-9206-038-1
DOI
10.2878/729922
Catalogue number
TS-01-19-250-EN-N
Paper
ISSN
ISBN
978-92-9206-039-8
DOI
10.2878/016171
Catalogue number
TS-01-19-250-EN-C
Paper
ISBN
978-92-9206-039-8
DOI
10.2878/016171
Catalogue number
TS-01-19-250-EN-C
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