Results 281 to 290 of about 41,139 (300)
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Dual-Satellite Geolocation With Ephemeris Correction and Uncertainty Mapping
IEEE Transactions on Aerospace and Electronic Systems, 2020In this paper, we demonstrate that the uncertainty of the dual-satellite ephemeris must be included in order for the geolocation covariance to be accurate. Without the inclusion of this additional error source, the covariance is no longer consistent with
J. Geeraert, J. McMahon
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Empire Survey Review, 1955
A New measure of time, Ephemeris Time, has recently been introduced by astronomers. The purpose of this short article is to explain briefly why this has been necessary and how it will affect navigation.
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A New measure of time, Ephemeris Time, has recently been introduced by astronomers. The purpose of this short article is to explain briefly why this has been necessary and how it will affect navigation.
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IEEE Sensors Journal, 2019
Subjected to the current observation technology, the planetary ephemerides which are used to predict the positions of planets are not accurately known. For Jupiter exploration, ephemeris error of Jupiter will greatly degrade the performance of navigation
Mingzhen Gui, X. Ning, Xin Ma, Jie Zhang
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Subjected to the current observation technology, the planetary ephemerides which are used to predict the positions of planets are not accurately known. For Jupiter exploration, ephemeris error of Jupiter will greatly degrade the performance of navigation
Mingzhen Gui, X. Ning, Xin Ma, Jie Zhang
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Study of Correction Maneuver for Lunar Flyby Transfers in the Real Ephemeris
Journal of Guidance Control and Dynamics, 2018In this paper, the trajectory correction maneuver (TCM) problem of several lunar flyby transfers is investigated in the ephemeris model. The error analysis indicates that the state error of a transfer orbit will be enlarged by lunar flyby; hence, a TCM ...
Yi Qi, A. D. Ruiter
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Performance Evaluation of the CNAV Broadcast Ephemeris
Journal of navigation, 2019The new Global Positioning System (GPS) Civil Navigation Message (CNAV) has been transmitted by Block IIR-M and Block IIF satellites since April 2014, both on the L2C and L5 signals.
Ahao Wang +4 more
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, 2017
This paper characterizes the GLONASS broadcast clock and ephemeris performance over an eight year period from 2009 through 2016, where both nominal signal-in-space (SIS) user range error (URE) and faulty behavior are explored.
Kazuma Gunning, T. Walter, P. Enge
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This paper characterizes the GLONASS broadcast clock and ephemeris performance over an eight year period from 2009 through 2016, where both nominal signal-in-space (SIS) user range error (URE) and faulty behavior are explored.
Kazuma Gunning, T. Walter, P. Enge
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Assessment of BDS-3 global positioning service: ephemeris, SPP, PPP, RTK, and new signal
GPS Solutions, 2020Junbo Shi +3 more
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Satellite ephemeris prediction for the Earth orbiting satellites
Aerospace Systems, 2021Vineet K. Srivastava +2 more
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Rendezvous to asteroid with highly uncertain ephemeris: Hayabusa2’s Ryugu-approach operation result
Astrodynamics, 2020Y. Tsuda +10 more
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