Results 181 to 190 of about 3,306 (203)
Some of the next articles are maybe not open access.
2021 2nd International Conference on Artificial Intelligence and Information Systems, 2021
Unmanned aerial vehicle (UAV) technology is widely used in transportation, in the process of UAV for satellite navigation and positioning, according to the broadcast ephemeris parameters according to the BeiDou Navigation Satellite System Signal In Space Interface Control Document, in the formula to calculate the satellite coordinates, tedious ...
Hu Peisen, Yang Yao, Li Chuanjun
openaire +2 more sources
Unmanned aerial vehicle (UAV) technology is widely used in transportation, in the process of UAV for satellite navigation and positioning, according to the broadcast ephemeris parameters according to the BeiDou Navigation Satellite System Signal In Space Interface Control Document, in the formula to calculate the satellite coordinates, tedious ...
Hu Peisen, Yang Yao, Li Chuanjun
openaire +2 more sources
Analysis and Modeling of GLONASS Broadcast Ephemeris Errors
2012One of the most problems in GNSS application is to obtained high precision ephemeris. In this paper, the error characters of GLONASS broadcast ephemeris (GBE) are analyzed carefully. one week data of all healthy orbiting satellites from GBE are calculated and their errors are figured out.
ChenXi Zhang +4 more
openaire +2 more sources
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
openaire +2 more sources
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
openaire +2 more sources
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 ...
He Zhao +8 more
openaire +2 more sources
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, Chao Hu, Yilei He, Qianxin Wang
openaire +2 more sources
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 ...
Rui Guo +5 more
openaire +2 more sources
Satellite autonomous navigation algorithm analysis based on broadcast ephemeris parameters
SCIENTIA SINICA Physica, Mechanica & Astronomica, 2015At present, the satellite on-board processing and transmission capacity of autonomous navigation is not enough to support the traditional centralized dynamic navigation algorithm. In order to augment the possibility of centralized onboard processing, this paper puts forward a centralized kinematics orbit determination method which is based on the long ...
XiaoYong Song +5 more
openaire +2 more sources
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 ...
Jing Guo, Guangjun Liu
openaire +2 more sources
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.
Yunxiang Xu, Bin Wu
openaire +2 more sources