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EGNOS Open Service
| EGNOS | |
|---|---|
| Title | EGNOS Open Service |
| Author(s) | GMV. |
| Level | Basic |
| Year of Publication | 2011 |
The EGNOS Open Service consists of a set of signals for timing and positioning intended for general purpose applications. It is fully accessible by means of a GPS/SBAS compatible receiver, it is free of charge and it does not require any receiver specific certification nor authorization.
Introduction
The EGNOS Open Service consists of a set of signals for timing and positioning intended for general purpose applications. It is fully accessible by means of a GPS/SBAS compatible receiver, it is free of charge and it does not require any receiver specific certification nor authorization. Details about the EGNOS-enabled receiver design specifications can be found in EGNOS Receiver specficatoin document.[1]
This service is provided through the GEO satellites within the EGNOS service area and it improves GPS performances in Europe. However, EGNOS OS shall only be used for non safety critical purposes, i.e. those where degraded performances could not provoke personal damage. Besides, no service guarantee or liability is provided by the EGNOS Service provider,[2] the European Commission[3] or the European Space Agency (ESA).[4]
The EGNOS Open Service is the first EGNOS service to become available and its main objective is to obtain enhanced positioning accuracy by correcting the error contributions that affect GPS signals, which are related to satellite clocks, satellite payload induced signal distortion, satellite position uncertainties and ionospheric delays whereas other effects, such as tropospheric delays, multipath or user receiver contributions, are local effects and cannot be corrected by an SBAS system.
EGNOS OS is accessible in Europe to any user equipped with an appropriate GPS/SBAS compatible receiver for which no specific receiver certification is required.
The OS was declared available on the 1st October 2009[5] and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.