Space navigation receiver operating with the assistance of navigation information

A space navigation receiver (NR), comprising i) a radiofrequency processing module (PM1) configured to convert radio navigation signals transmitted by a satellite navigation system into digital signals, ii) a digital processing module (PM1) configured to produce raw measurements based on said navigation digital signals, and iii) a location module (LM) configured to determine location points from said raw measurements, demodulated navigation data initially contained within said digital navigation signals in a modulated form, and orbital force models, characterized in that said radiofrequency processing module (PM1) is also configured to convert auxiliary radio signals representative of navigation information about said system into auxiliary digital signals, and in that said digital processing module (PM2) is configured to periodically acquire said digital navigation signals by sub-sampling the received radio signal, then processing the acquired signal's samples resulting from said sub-sampling so as to deduce said raw measurements from these samples, from said auxiliary digital signals, and from said location points.