A positioning system and method for resilient ephemeris decoding of Global Navigation Satellite System (GNSS) satellite information is provided. The positioning system decodes first ephemeris data of a satellite in a GNSS satellite constellation and estimates a first position of the satellite at a first time-instant. The positioning system further estimates a deviation between the estimated first position and a position where the satellite is expected to be at the first time-instant and determines the estimated deviation to be above a threshold. The positioning system excludes use of the estimated first position in a position fixing operation of the positioning system based on the determination. The positioning system decodes second ephemeris data of the satellite based on the exclusion, estimates a second position of the satellite at a second time-instant, and controls a position filter of the positioning system to use the estimated second position in the position fixing operation.