There is a wide range of opportunities for harnessing EDAS to support a range of applications or services, including the following:
- Redistribution of EGNOS augmentation messages
- A-GNSS for Location Bases Services
- Professional GNSS services
- ... And more, including performance monitoring and research
These example applications which EDAS could help support are described in more details below.
Redistribution of EGNOS augmentation messages
The EGNOS augmentation messages are provided by three EGNOS Geostationary satellites to users. For users to receive the EGNOS augmentation message, they must maintain visibility of 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 in line with their own equipment standards. To address these requirements EGNOS augmentation messages could 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 would be repeated from fixed transmitters providing the augmentation message.
A-GNSS for Location Based Services
A-GNSS services enable mobile phones on operators' networks to obtain more quickly a position from GNSS signals along with greater accuracy. In urban areas A-GNSS is widely seen as essential for successful Location Based Services. A-GNSS services are provided by mobile network operators themselves or by third parties. An A-GNSS service is provided using a server to process raw GNSS signals from mobile phone users and deliver back (over the network) the position. These processes utilise processed data from networks of reference stations (i.e. GNSS receivers). A-GNSS providers could also send, when permitted, the position information of mobile phones onto other parties such as emergency services (e.g. E-112).
EDAS raw RIMS data can be used as a data input into the processes supporting current or future A-GNSS services to network operators.
Professional GNSS services
High accuracy GNSS based services today serve a wide range of users in the professional GNSS market. These services include users within surveying, oil and gas exploration, mapping, construction, tracking and more.
Today's solutions rely on networks of GNSS receivers to support 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. Today 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, or build new offerings.
Once EDAS has been integrated and processed by a service provider, it may be delivered to users through many of the channels used today - GSM, internet, and satcoms.
... and more
A-GNSS, professional GNSS services and redistributed EGNOS messages are just some of the possible applications for EDAS. A selection of other EDAS applications includes:
- Supporting an EGNOS performance monitoring facility to serve EGNOS user communities
- Supporting geodetic and mapping research
- Forming a NOTAM service using the data provided in EDAS
- Potential reconstruction of the EGNOS augmentation message and distribute to users - this could provide the opportunity to tailor the augmentation messages for the urban environment