Results 131 to 140 of about 425 (159)
Some of the next articles are maybe not open access.
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
exaly +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, Tao Geng, Qile Zhao
exaly +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 ...
Zhongkai Zhang, Du Lan
exaly +2 more sources
Integrity monitoring of NavIC by parsing broadcast ephemeris
Journal of Applied Geodesy, 2023Abstract Global navigation satellite systems (GNSS) are used to provide position estimation to the users. These navigation systems must meet the required navigation parameters (RNP) parameters. Among them integrity being the important parameter, defined as a navigation system’s honesty of the information provided to the user by ...
Sony Devalapally +2 more
openaire +1 more source
Measurement Science and Technology, 2021
Abstract Low Earth orbit (LEO) satellites are a promising type of navigation augmentation satellite for current global navigation satellite systems. Aiming at the navigation function, an effective broadcast ephemeris model needs to be designed for LEO satellites.
Lingdong Meng +3 more
openaire +1 more source
Abstract Low Earth orbit (LEO) satellites are a promising type of navigation augmentation satellite for current global navigation satellite systems. Aiming at the navigation function, an effective broadcast ephemeris model needs to be designed for LEO satellites.
Lingdong Meng +3 more
openaire +1 more source
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. Compared to the Legacy Navigation Message (LNAV), the CNAV message provides six additional parameters (two orbit parameters and four Inter-Signal Correction (ISC ...
Ahao Wang +4 more
openaire +1 more source
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 ...
Peisen Hu, Chuanjun Li, Yao Yang
openaire +1 more source
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 ...
Peisen Hu, Chuanjun Li, Yao Yang
openaire +1 more source
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 +1 more source
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 +1 more source
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
openaire +1 more source