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Continuous High-Precision Positioning in Smartphones by FGO-Based Fusion of GNSS-PPK and PDR. [PDF]
Micromachines (Basel)Magsi AH, Díez LE, Knauth S.
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Broadcast Ephemeris Accuracy Analysis for GPS Based on Precise Ephemeris
Applied Mechanics and Materials, 2014The accuracy of broadcast ephemeris is an important index of a satellite navigation system. The theory and method of precise ephemeris assessing broadcast ephemeris are introduced. The accuracy of GPS satellite broadcast ephemeris is assessed with the precise ones provided by IGS.
Xiao Yu Li, Li Xiao Yu
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Precise point positioning study to use different IGS precise ephemeris
2011 IEEE International Conference on Computer Science and Automation Engineering, 2011The fundamental principle and considered fundamental factors of GPS precise point positioning are discussed, the experimental research show that the error of GPS precise point positioning is greater to use broadcast ephemeris, and broadcast ephemeris can obtain only the accuracy of meter level, the positioning error of Z direction is greater than X ...
null Fumin Lu, null Jin Li
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Using Fourier series to fit The GPS precise ephemeris
2010 International Conference on Computer Application and System Modeling (ICCASM 2010), 2010On Base of analyzing the shortcomings of the methods used commonly to fit the GPS precise ephemeris, the paper proposes the new method using Fourier series to fit the GPS precise ephemeris. It expounds the basic principle of the method and presents the steps of implementation.
null Jiang Ruibo, null Liu Xiaoqiang
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An Efficient and Precise Method for Calculating the Dense Ephemeris of High Eccentricity Orbit
Chinese Astronomy and Astrophysics, 2021Abstract Detection and cataloguing of space targets are an important issue for spacecraft safety. The large number of space targets makes the workload of orbit calculation very heavy. Being fast in calculation, the analytical method however cannot handle the processing of high-precision observational data. The numerical method on the contrary is good
DAI Zhi-jun, XU Jin
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Assessment of precise GPS ephemeris and clock in the International GNSS service
IEEE/ION Position, Location and Navigation Symposium, 2010Currently many vessels determine an overhead clearance by a rule of thumb based on their draft for maritime navigation. Therefore when vessels navigate, they don't have a good overhead clearance because vertical position of vessels varies on time by tidal.
Deuk Jae Cho +2 more
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Analyzing the Precision of Chebyshev Polynomial Fitting GPS Satellite Ephemeris
Applied Mechanics and Materials, 2013Using Chebyshev polynomial to fit precise ephemeris of GPS, the nodes selection has a certain influence on the precision. In this paper we use 3 kinds of precise ephemeris ( IGF, IGR, IGU ) to analyze the difference precision of randomly selected interpolation node and Chebyshev points fitting orbit and compare the difference and precision of fitting ...
Peng Fei Zhang, Zhang Peng Fei
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Journal of Guidance, Control, and Dynamics, 2003
A precise onboard ephemeris propagation method that uses a multiple sequential compression is developed. A least-square regression is used to dee ne the reference orbit in the form of polynomial functions. Then the position and velocity residuals in terms of rectangular coordinates are generated by subtracting the reference orbit from a numerically ...
Kyle T Alfriend
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A precise onboard ephemeris propagation method that uses a multiple sequential compression is developed. A least-square regression is used to dee ne the reference orbit in the form of polynomial functions. Then the position and velocity residuals in terms of rectangular coordinates are generated by subtracting the reference orbit from a numerically ...
Kyle T Alfriend
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Machine learning approach for predicting precise ZTD produced by GNSS broadcast ephemeris
2022 IEEE 11th Global Conference on Consumer Electronics (GCCE), 2022Minoru Okada, Takeshi Higashino
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GPS positioning accuracy using precise real‐time ephemeris and clock correction
Marine Geodesy, 1994Global positioning system (GPS) has found applications in various areas including marine geodesy. GPS positioning accuracy, however, is greatly degraded by GPS ephemeris and clock errors, particularly errors due to Selective Availability (SA). Thus, it is crucial to use precise ephemeris and clock corrections for users who require high position ...
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