Results 181 to 190 of about 3,314 (215)
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A parallel GPS satellite positioning algorithm based on broadcast ephemeris
2015 8th International Congress on Image and Signal Processing (CISP), 2015GPS is an all-round, all-weather, real-time satellite navigation and positioning system. GPS satellite positioning based on broadcast ephemeris is to calculate satellite coordinates using relevant parameters obtained from broadcast ephemeris after broadcast ephemeris were analyzed.
Si Zhang, Zhenzhou Ji
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Accuracy Analysis of BDS-3 Experiment Satellite Broadcast Ephemeris
2018Currently, five BDS-3 experiment satellites are transmitting both BDS-2 signals and new signals for users. They are equipped with high-precision rubidium or/and passive hydrogen maser clocks. In view of the inconsistency of BDS-3 experiment satellites signals received by iGMAS and MGEX network, the experiment to determine BDS-3 orbits is carried out by
Ya Mao, Qianxin Wang, Chao Hu, Yilei He
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Doppler shift estimation using broadcast ephemeris in satellite optical communication
2016 25th Wireless and Optical Communication Conference (WOCC), 2016There is severe Doppler shift in satellite optical communication, which greatly affects the coherent demodulation and should be eliminated. This paper is a preliminary study of the optical phase-locked loop, using the broadcast ephemeris to estimate the Doppler shift and pulling it down into a range in which it can be captured by digital processing.
null Yunxiang Xu, null Bin Wu
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An 18-element GEO broadcast ephemeris based on non-singular elements
GPS Solutions, 2014Compass/Beidou2 uses uniform GPS-type broadcast ephemerides for its mixed constellation, which consists of geostationary earth orbit (GEO), inclined geosynchronous orbit and medium earth orbit satellites. The ephemeris parameters adopted by Compass are singular for the small inclinations of GEOs, and some intermediate orbital planes are currently used ...
Lan Du +5 more
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Autonomous broadcast ephemeris improvement for GNSS using inter-satellite ranging measurements
Advances in Space Research, 2012Abstract This paper discusses the concept of using inter-satellite ranging (ISR) measurements of the satellites of a Global Navigation Satellite System (GNSS) for autonomous broadcast ephemeris improvement. Firstly the inter-satellite ranging is modeled to obtain the clock and orbit error observables.
Hongliang Xu, Jinling Wang, Xingqun Zhan
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Design and validation of broadcast ephemeris for low Earth orbit satellites
GPS Solutions, 2018Low Earth orbit (LEO) constellations have potentialities to augment global navigation satellite systems for better service performance. The prerequisite is to provide the broadcast ephemerides that meet the accuracy requirement for navigation and positioning.
Xin Xie +5 more
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Optimal design of broadcast ephemeris parameters for a navigation satellite system
GPS Solutions, 2011Computation of broadcast ephemerides is a fundamental task in satellite navigation and positioning. The GPS constellation is composed of medium-earth-orbit (MEO) satellites, and therefore can employ a uniform parameter set to produce broadcast ephemerides.
Xiaofeng Fu, Meiping Wu
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Fitting Method and Accuracy Analysis of Broadcast Ephemeris in Hybrid Constellation
2014Broadcast ephemeris parameter is an important reflection of navigation system service performance. In hybrid constellation, GEO, IGSO and MEO satellites have different dynamic characteristics which lead to different fitting performances. In this article, the basic physical meaning of ephemeris parameters are analyzed, and the evaluation for the ...
Feng He +8 more
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Real-Time Determination of a BDS Satellite's Velocity Using the Broadcast Ephemeris
2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control, 2014This paper studies the algorithms for determining a BDS satellite's velocity using the broadcast ephemeri. Firstly, by taking the time derivatives of the Kepler orbit elements and the correction terms, the algorithm comprises close-form analysis formulas and the processing steps for directly computing a BDS satellite's instant velocity using the ...
Guangjun Liu, Jing Guo
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Satellite Ephemeris Broadcasting Architecture for 5G Integrated LEO Satellite Internet
2022 IEEE 22nd International Conference on Communication Technology (ICCT), 2022Jianwei Li +4 more
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