The navigation performance of Iridium satellite is simulated and analyzed based on STK from two aspects—the number of visible satellites and geometric dilution of precision (GDOP). Meanwhile we compare it with GPS and GALILEO system to demonstrate its performance. Experiment shows that the Iridium satellite system has a good coverage merit at two poles, which is even better than that of GPS In addition, the RMS of observation residuals for Galileo in single-frequency PPP was noticeably lower than that for GPS, demonstrating that the observation quality of Galileo code measurements is better than those of GPS. Among the ACs, Galileo-based PPP solutions applying CODE products produced slightly better results than those obtained for The boxplot in Fig. 6 indicates that the convergence performances of the GPS/GLONASS, GPS/GALILEO, GPS/BDS/GLONASS and GPS/BDS/GLONASS/GALILEO combined PPP are better than the GPS-only and GPS/BDS in the early stage (that is, the period of convergence to 0.2 m). In 75% of the cases, it takes an average of 28.4 min to converge to 0.2 m accuracy An alternative positioning system that is more robust and accurate than GPS, especially in urban settings has been developed by researchers of Delft University of Technology, Vrije Universiteit Amsterdam, and VSL. The working prototype that demonstrated this new mobile network infrastructure achieved an accuracy of 10 centimeters. According to the GPS homepage, “ On May 11, 2016, the global average URE was ≤0.715 m (2.3 ft.), 95% of the time.”. Yet, there’s something else to take into consideration when considering GPS accuracy. The URE is not the same as the user accuracy. The former refers to what is being sent, while the latter refers to what is being received.
The accuracy is an advantage of GLONASS with up-to 2 meter of accuracy. GPS + GLONASS allows your device to be pin pointed by a group of 55 satellites all across the globe. So when you are in a place where GPS signals are stuck like between huge buildings or subways, you will be tracked by GLONASS satellites accurately.
How come NaVIC is more precise than GPS? That’s a bit technical, but it is essentially because NaVIC uses two frequencies instead of one — the L5 (1176.45 MHz) and S band (2492.028 MHz).
Based on the orbital characteristics of GPS & Galileo, it seems rather unlikely that more Galileo satellites were visible. This is confirmed also by the following two facts. 2) As we can see comparing Figures 3 (a) and (c), the IPPs of GPS are clearly more than the IPPs of Galileo, which means that more GPS satellites were visible.
The Galileo UPDs exhibit better performance than BDS UPDs due to the high-quality observations. It is also interesting to find that the EWL UPD corrections for all Galileo satellites are very
In general, over 70% and 80% of GPS and Galileo ambiguity residuals after wide-lane phase bias corrections fall in ± 0.1 cycles, in contrast to less than 50% for BeiDou Navigation Satellite (Regional) System (BDS-2); moreover, around 90% of GPS/Galileo narrow-lane ambiguity residuals are within ± 0.1 cycles, while the percentage drops to
Frankly more thing of principle. Been following the project since like 2006. So might just upgrade for the sake of having it, even though the constellation is not complete. It's n
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    • is galileo better than gps