In this article, the authors present some of the new facilities offered by GPS technologyproducers in RTK (Real Time Kinematic) measurements. This facilities give to the users more flexibilityand implicit more efficiency in the field measurements. In the article, are presented especially thepractical consequences of the mutual radio communication facilities: rover–base and base-rover. In thisarticle, the authors present some of the new facilities offered by GPS technology producers in RTK (RealTime Kinematic) measurements. This facilities give to the users more flexibility and implicit moreefficiency in the field measurements. In the article, are presented especially the practical consequences ofthe mutual radio communication facilities: rover–base and base-rover. Specific RTK GPS measurementswith impressive efficiency. Thus, GPS users will not stay in the point which planimetric and altimetricdesired position than is strictly necessary time. Can be 10, 20 seconds or can be 2 or 3 minutes(depending on various factors among which we mention here: the type of receiver used (one or twofrequencies, the radio communication uni-directional or bi-directional, etc..) quality radio modems,mobile station distance (rover) GPS base (base) satellite configuration (including geometric) degree ofobstruction both in the base and the rover GPS receiver latency (that depends on the frequency ofcollection data, emission-transmission and reception of differential corrections) and not least the degreeof fixation / tracking (tracking) on the same satellites as the base station and rover station. Moderntechniques for rapid problem solving ambiguities (on the fly ambiguities Techniques) also allow time toobtain full position (tens of seconds) the stationary point accuracy indicators that can be improved byincreasing the retention time. Of course, RTK positioning accuracy measurements depends almostentirely on the accuracy and precision of determining the support network (its points serve as controlpoints for stays basis). In what follows, we start from the premise priori existence of a network to supportwell designed and well implemented in the measurements.Great GPS equipment manufacturers haveimplemented solutions bi-directional radio communication mainly due to the need for real-timesynchronization of base stations to the rover. The two receivers to simultaneously collect GPS data fromthe same sources specific space (same satellites) so that synchronization is vital to the whole process.Configuration of satellites received by the base radio is sent as a binary rover's list and it must "comply"and engage in terms of the same satellite signal received from that configuration.

mutual radio communication, GPS mesurements

Presentation: oral