There is a wide range of opportunities for harnessing EDAS to support a range of applications or services, including:
- Redistribution of EGNOS augmentation messages
- A-GNSS for Location Bases Services
- Professional GNSS services
- ... And more, including performance monitoring and research
Redistribution of EGNOS augmentation messages
EGNOS augmentation messages are provided to users by three EGNOS geostationary satellites. To receive the EGNOS augmentation message, a user must maintain visibility with at least one geostationary satellite. However, for some users the visibility of EGNOS satellites is restricted, such as in urban canyons. In other cases, supplying the EGNOS augmentation in a different format may be beneficial to user communities with their own equipment standards.
To address these requirements, EGNOS augmentation messages can be distributed by service providers through a variety of channels:
- Internet Protocol (IP)
- Radio Data System (RDS) communication protocol standard
- Digital Audio Broadcast (DAB) communication protocol standard
- Using EGNOS pseudolites, where the EGNOS Signal in Space is repeated from fixed transmitters
A-GNSS for Location Based Services
Assisted GNSS (A-GNSS) services enable mobile phones, connected to a network, to more quickly and more accurately obtain a position from GNSS signals. In urban areas in particular, A-GNSS is widely seen as essential for successful Location Based Services.
A-GNSS services are provided either by a mobile network operator or a third party. It uses a server to process raw GNSS signals from mobile phone users and delivers back (over the network) the position. These processes utilise processed data from networks of reference stations (i.e. GNSS receivers). A-GNSS providers can also send, when permitted, the position information of mobile phones to other parties, including emergency services (e.g. E-112).
EDAS raw RIMS data can be used as a data input into the processes supporting current and future A-GNSS services to network operators.
Professional GNSS services
Today, high accuracy GNSS based services serve a wide range of users in the professional GNSS market. These services include users within the surveying, oil and gas exploration, mapping, construction, and tracking fields – to name only a few.
Today's solutions rely on networks of GNSS receivers to support their high accuracy services. These data sets are used in processes to deliver Differential GNSS (DGNSS) and Real Time Kinematic (RTK) services - including wide-area and network solutions.
The raw GNSS receiver data from the RIMS network provided by EDAS can be used to support a range of high accuracy GNSS solutions. These are supplied by commercial service and equipment providers. EDAS provides service and equipment providers the opportunity to exploit data from the EGNOS RIMS network to enhance existing services and build new offerings.
Once EDAS has been integrated and processed by a service provider, it can be delivered to users through many of the channels currently in use, including GSM, Internet and satcoms.
... and more
A-GNSS, professional GNSS services and redistributed EGNOS messages are just some of the possible applications for EDAS. Other EDAS applications include:
- Supporting an EGNOS performance monitoring facility to serve EGNOS user communities
- Supporting geodetic and mapping research
- Forming a Notice to Airmen (NOTAM) service using EDAS provided data
- Potential reconstruction of the EGNOS augmentation message and distribution to users, providing the opportunity to tailor the augmentation messages for the urban environment