Results 291 to 300 of about 850,443 (319)
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Frequency transfer using precise point positioning
18th European Frequency and Time Forum (EFTF 2004), 2004Using precise point positioning (PPP) we show the potential for comparing frequency standards with time stabilities of under 300 ps in flicker phase noise for time periods of 1 to 10 d. This leads to comparisons at 1 part in 1015 or better at 10 d. We compare short baseline PPP results with 2 hour data from the NIST Measurements System.
K. Senior +3 more
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Multifrequency algorithms for precise point positioning: MAP3
GPS Solutions, 2013We present the new MAP3 algorithms to perform static precise point positioning (PPP) from multifrequency and multisystem GNSS observations. MAP3 represents a two-step strategy in which the least squares theory is applied twice to estimate smoothed pseudo-distances, initial phase ambiguities, and slant ionospheric delay first, and the absolute receiver ...
B. Moreno Monge +2 more
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Performance of Real-Time Precise Point Positioning
Marine Geodesy, 2013The IGS Real-time Pilot Project (IGS-RTPP) provides real-time precise orbits and clocks, which support real-time positioning for single stations over large areas using the Precise Point Positioning (PPP) technique. This paper investigates the impact of real-time orbits, network configuration, and analysis strategies on real-time PPP implementation and ...
Junping Chen +5 more
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Performance Evaluation of Galileo Precise Point Positioning
2019Galileo Satellite Navigation System has been put into trial operation at the end of 2016. Whether Galileo Satellite Navigation System can be used independently for navigation and positioning needs to be analyzed and evaluated because it is not yet in full constellation, especially the performance of Galileo Precision Point Positioning is worth studying.
Wenlong Qi +5 more
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On User Algorithms for GNSS Precise Point Positioning
2016Civil Engineering and ...
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Single-frequency precise point positioning with optimal filtering
GPS Solutions, 2006The accuracy of standalone GPS positioning improved significantly when Selective Availability was turned off in May 2000. With the availability of various public GPS related products including precise satellite orbits and clocks, and ionosphere maps, a single-frequency standalone user can experience even a further improvement of the position accuracy ...
Le, A.Q. (author), Tiberius, C. (author)
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Real Time Satellite Clocks in Precise Point Positioning
2011Computing a position with Single Frequency Precise Point Positioning (SF-PPP) algorithms compels to the use of satellite clock corrections, and for use with real-time applications, only a limited set of sources for orbit and clock data is available, for example the predicted Ultra Rapid products of the International GNSS Service (IGS).
van Bree, Roel +2 more
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Transporting Hydrogel via Chinese Acupuncture Needles for Lesion Positioning Therapy
Advanced Science, 2022Feng Lin, Xiaobing Xi, Lianfu Deng
exaly
A Survey on Fusion-Based Indoor Positioning
IEEE Communications Surveys and Tutorials, 2020Nkrow Raphael Elikplim +2 more
exaly
Survey on WiFi‐based indoor positioning techniques
IET Communications, 2020Fen Liu, Pengpeng Chen, Qiang Niu
exaly