EGNOS SDK Development process - EGNOS Portal

EGNOS-SDK EnhancementsR&D Algorithms: Increased Satellite ConstellationPurpose: Improve the uncertainty of the PVT solution by increasing the number ofobservations, or satellite signals used. An increased number of satellites used in theposition computation could lead to an improvement in the position accuracy.Reasons satellites are excluded from the position computation: Low elevation angle Low Signal-to-Noise Ratio (SNR) “Not Monitored EGNOS Indicatorunreliable range measurementsdesigned for aviation applications tomeet integrity requirementsAviation ApplicationsIntegrity requirementClear view of the skySmartphone ApplicationsAvailability requirementObstructed view of satellitesTherefore, the requirements mentioned in the DO-229D specification have to be adaptedfrom the aviation sector to the urban scenarios, targeting smart-phone applications,where the number of satellites available is reduced in comparison to aviationapplications, and where integrity is not a top priority.June 2012 - EGNOS Software Development Kitpag. 20