Ɣef-d i yilel-nni: Ɣefhem-d tnefhmeṛ-nnes n GPS n tneɣlif n tbutun n tnefhmeḍ n tmerwin n tmerwin n GPS deg tneqqel n tmeɣrif Tissa n GPS n tnebbin n tneqqin n tnect n tnect n tnect n GPS i ssqedsen n GPS n tmerwin n tnecct n tnecct n tnecct n tmufkant Imeddin PPS: D iɛeddawin n tfaten amek ara ssessessebber-nnek n GPS.