EGNOS SDK Development process - EGNOS Portal
EGNOS SDK Development process - EGNOS Portal
EGNOS SDK Development process - EGNOS Portal
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Max. exceeded – exit, no position<strong>EGNOS</strong>-<strong>SDK</strong>Module interaction - R&D PositioningF5. SBAS RangingSatellite positionInitial position (Bancroft)F3.Improve Sat. Const.PositioningRange determinationDefinition of the matrixR i = x i − x u 2 + y i − y u 2 + z i − z u2H = − cos el i sin az i − cos el i cos az i − sin el i 1PseudorangesF3. Fast Corr. with No RRCApply <strong>EGNOS</strong> CorrectionsPR i = PR i + Fast Corr. + Iono. Corr. + Tropo. Corrt iSatellite clock biasRange differencedPR i = pr i +c. t i + IC i + TC i + PRC i − R iCorrected pseudrangeF3. Best Weight MatrixWWeight matrixSolvedX = (H T . H) −1 . H T . dPRdX = (H T . W. H) −1 . H T . W. dPRCheck iterationsF3. Best Sat. Const.Update positionsX = X + dXCheck HDOPCheck updateStop|r n−1 − r n | < εr = x u ² + y u ² + z u ²… shows the influence of <strong>EGNOS</strong>June 2012 - <strong>EGNOS</strong> Software <strong>Development</strong> Kitpag. 10
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