Satellite navigation has changed the world, millions of people all over the world use it every day and their number is constantly rising. At the same time the transportation of goods and people has become a crucial part of our globalized economy. Precise and reliable satellites navigation can help to raise capacity in this field. Unfortunately global navigation satellite systems like GPS have a narrow range of up to 10 meters, they do not guarantee that the given position can be used for safety critical applications.
EGNOS the European geostationary navigation overlay service or commence GPS and Galileo. Data from EGNOS improve accuracy of the users position and time and provide the guarantee that the GPS signal can be trusted, this opens a new field for innovative satellite navigation applications.
Here’s how it works, 40 monitoring stations all over Europe collect data from GPS satellites, the gathered information is analyzed and processed to generate EGNOS correction and integrity messages for each GPS satellite. Two EGNOS satellites in geostationary orbit, broadcast this information to EGNOS enabled receivers, with this additional data the receivers are able to give a more precise vertical and horizontal position.
EGNOS provides three types of services:
1- Open service
that provides accuracy in situation where safety is not a critical issue like precision farming mapping or surveying.
2- Safety of life
this service was certified in 2011 to be used by aviation and for other applications where human lives are at stake. it works with receivers standardized for aviation safety. EGNOS enables the publication of safe flight approach procedures for aircraft to land even when visibility is poor without the need for airports to invest in ground navigation aids more than 100 airports already use it and their number is constantly rising.
the EGNOS data access service provides law data collected by the EGNOS infrastructure in different formats, this data is transmitted via a server connected to the internet for further processing in other applications.
The EGNOS program was started by the European Commission and the European Space Agency together with aviation stakeholders. Today the infrastructure is owned by the European Commission, the service is managed by the GSA and provided by ESSP, a private company founded by seven key european air navigation service providers. ESSP’s mission is to operate and maintain the EGNOS system providing its three services in an efficient and safe manner. EGNOS is available in the whole European region free of charge. With EGNOS satellite navigation has become more accurate than ever before, leading to more efficiency, more safety and the implementation of innovative satellite navigation applications in domains like aviation agriculture, mapping and other means of transportation.