EGNOS SDK Development process - EGNOS Portal

EGNOS-SDK EnhancementsR&D Algorithms: 2D Position AlgorithmPurpose: provide a position result when only a reduced set of satellites is available.The standard GPS Algorithm has four unknowns: Latitude Longitude Altitude TimeGPSGPSBy eliminating one of the unknowns:• Latitude• Longitude• Altitude• Time Three satellites are sufficient to obtain a position, which is an important aspect inurban situations, where surrounding buildings obstruct the clear view of the sky,many times making it difficult to track four satellites. The ratio of number of observations available to the number of unknowns increasesand as a result a solution with a lower degree of uncertainty can be obtainedJune 2012 - EGNOS Software Development Kitpag. 26