PROCESS FOR OPTIMAL ADJUSTMENT OF GIVE ERROR TERMINALS OR OPTIMUM CALCULATION OF IGP POINT RESIDUE VARIANCES OF AN IONOSPHERIC CORRECTION GRID OF AN SBAS SYSTEM AND SBAS SYSTEM FOR IMPLEMENTING THE SAID PROCESS

摘要

A method for optimally adjusting GIVE ionospheric correction error bounds and / or a method for calculating variances of IGP point residuals of an ionospheric correction grid of an SBAS system each comprise an inverse interpolation step ( 220) implementation on a set of observation piercing points IPPi. In the method for optimal adjustment of the GIVEs, the reverse interpolation step (220) disseminates for each observation piercing point IPPi concerned a variance increment ΔUIVEi 2 on the IGP points of the mesh of said IPPi using a method least squares. In the calculation of the variances of residues, the inverse interpolation step disseminates for each point of observation piercing IPPi concerned a residue Resi 2 on the IGP points of the mesh of said IPPi using a least squares method