000004560 001__ 4560
000004560 005__ 20200116172527.0
000004560 0247_ $$2DOI$$a10.3390/s19204389
000004560 037__ $$aSCART-2020-0020
000004560 100__ $$aHuang, Wei
000004560 245__ $$aImproved Multi-GNSS PPP Software for Upgrading the DEMETRA Project Time Monitoring Service
000004560 260__ $$c2019
000004560 520__ $$aThe H2020 DEMETRA project provides short latency clock monitoring services to the time users using the Atomium precise point positioning (PPP) software developed by the Royal Observatory of Belgium. In this paper, three recent updates of the current Atomium software are introduced: adding Galileo signals in the PPP computation; the option to constrain the receiver clock; PPP with integer ambiguity resolution. The advantages of these updates are demonstrated: Combining the Galileo and global positioning system (GPS) signals for PPP time transfer will further improve the frequency stability inside the computation batch; PPP with receiver clock constraint is not only used to reduce the short-term noise of the clock measurements but can also be used for some specific applications to a keep continuous clock solution in the computation batch or retrieve correct clock measurements from extremely noisy environments; the integer PPP allows a continuous clock solution, and improves the mid-term and long-term stability of the frequency transfer compared to the current PPP frequency transfer techniques.
000004560 594__ $$aNO
000004560 700__ $$aDefraigne, Pascale
000004560 700__ $$aSignorile, Giovanna
000004560 700__ $$aSesia, Ilaria
000004560 773__ $$c4389-4410$$n20$$pSensors$$v19$$y2019
000004560 8560_ $$fpascale.defraigne@observatoire.be
000004560 85642 $$ahttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC6833052/
000004560 905__ $$apublished in
000004560 980__ $$aREFERD