METHOD AND DUAL-FREQUENCY GPS RECEIVER

摘要

The invention concerns satellite radio navigation, in particular GPS, Galileo, GLONASS type satellite radio navigation. The solutions proposed in prior art for correcting ionospheric error by using a dual-frequency receiver reduces the robustness of the measurement relative to dynamic stress if the band used is narrow and less accurate if the band used in large. The invention provides a method comprising at least the following steps: modifying the mark of the dual-frequency base to an (average, variation) base; correcting on at least the variation loop (413) so as to obtain the difference of speeds in said (average, variation) base, inverse mark modification so as to calculate from the difference of speeds in the (average, variation) base the relative speed in the dual-frequency base; correcting the code speed for each of the two frequencies by the relative speed obtained in the dual-frequency base.