caa a22 4500 606162534 CHVBK 20210128100639.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10291-014-0425-1 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0425-1 Time-differenced carrier phases technique for precise GNSS velocity estimation [Elektronische Daten] [Pierluigi Freda, Antonio Angrisano, Salvatore Gaglione, Salvatore Troisi] Classically, a stand-alone GNSS receiver estimates its velocity by forming the approximate derivative of consecutive user positions or more often by using the Doppler observable. The first method is very inaccurate, while the second one allows estimation of the order of some cm/s. The time-differenced carrier phase (TDCP) technique, which consists in differencing successive carrier phases, enables accuracies at the mm/s level. A study on the existing TDCP velocity estimation algorithms has revealed that the use of different broadcast ephemeris sets to calculate the satellite positions and clock offsets produces a discontinuity in the TDCP measurements that affects the velocity estimation. We propose a method to overcome this limitation based on the use of the same set of ephemeris to calculate the satellite positions and clock offsets at consecutive epochs. We describe in detail the TDCP algorithm used, and the complete implementation in MATLAB is included. Springer-Verlag Berlin Heidelberg, 2014 GPS nationallicence TDCP nationallicence Velocity estimation nationallicence Ephemeris selection nationallicence Freda Pierluigi Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut Angrisano Antonio Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut Gaglione Salvatore Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut Troisi Salvatore Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 335-341 1080-5370 19:2<335 2015 19 10291 https://doi.org/10.1007/s10291-014-0425-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0425-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Freda Pierluigi Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut NATIONALLICENCE 700 1- Angrisano Antonio Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut NATIONALLICENCE 700 1- Gaglione Salvatore Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut NATIONALLICENCE 700 1- Troisi Salvatore Department of Science and Technology, Parthenope University of Naples, Naples, Italy aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 335-341 1080-5370 19:2<335 2015 19 10291