Results 181 to 190 of about 166,231 (222)

Real-time Kinematic Orbit Determination of GRACE D Satellite Using GPS Broadcast Ephemeris

2023 IEEE International Conference on Unmanned Systems (ICUS), 2023
Low Earth Orbit (LEO) satellite has played a crucial role in completing various Earth observation missions. Continuous precise orbit determination carried out by the GNSS receiver on board serves as the basis for the satellite to complete its tasks ...
Yonggai Zhuang, Lei Wang, Haitao Zhou
semanticscholar   +1 more source

Integrity monitoring of NavIC by parsing broadcast ephemeris

Journal of Applied Geodesy, 2023
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.
Sony Devalapally, Krishna Reddy Desireddy, Naveen Kumar Perumalla   +2 more
semanticscholar   +1 more source

Type B Fault Integrity Monitoring for BDS Broadcast Ephemeris

, 2020
The integrity and continuity of aircraft precision approach are the most significant performance requirements for aviation users. To ensure positioning integrity of users, it is necessary to detect type B ephemeris fault one of the main integrity risk sources of precision approach.
Liang Li, Yuanyuan Liu, Chun Cheng, Hui Li   +3 more
semanticscholar   +3 more sources

Broadcast Ephemeris Accuracy Analysis for GPS Based on Precise Ephemeris

Applied Mechanics and Materials, 2014
The 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.
Dong Yang Jin, Chang Feng Xia, Rui Xi Jia, Xiao Yu Li   +3 more
openaire   +2 more sources

Machine learning approach for predicting precise ZTD produced by GNSS broadcast ephemeris

Global Conference on Consumer Electronics, 2022
Precise modelling of tropospheric delay plays an important role of in the precise Global Navigation Satellite System (GNSS) positioning application as well as meteorological studies and weather forecasting.
T. Matsumura, T. Higashino, Yutaka Nakagawa, M. Okada   +3 more
semanticscholar   +1 more source

Design and validation of broadcast ephemeris for low Earth orbit satellites

GPS Solutions, 2018
Low 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, Xianglin Liu, Qiang Zhang, Jing-nan Liu   +5 more
semanticscholar   +3 more sources

Developing and validating an optimized 19-parameter broadcast ephemeris model for LEO satellites

Fourth International Conference on Geoscience and Remote Sensing Mapping
This study examines the creation of an advanced model for Low Earth Orbit (LEO) satellites within the framework of Global Navigation Satellite Systems (GNSSs).
Ziqi Wang, Yong Wang, Zongnan Li, Guangfu Sun   +3 more
semanticscholar   +1 more source

Computing satellite velocity using the broadcast ephemeris

GPS Solutions, 2004
GPS has been used for applications where satellite velocities are needed as well as satellite positions. Traditionally, the position was determined from noisy code pseudoranges while the velocity came from delta carrier phase measurements. This motivates the need to have a velocity model to accompany the velocity data.
openaire   +2 more sources

Precision Point Positioning Method with Galileo Broadcast Ephemeris for Grid Operations in Complex Environments

2024 4th International Conference on Smart Grid and Energy Internet (SGEI)
Precise Point Positioning (PPP) is a major technique for obtaining high-precision coordinates for grid operations in deep mountainous areas. However, the effects of extrapolation errors for broadcast orbits and clock offsets need to be carefully ...
Junfei Jiang, Hongwei Cai, Shiyu Lai, E. Shenglong, Lei Wang   +4 more
semanticscholar   +1 more source

Analysis and Modeling of GLONASS Broadcast Ephemeris Errors

2012
One 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, Jing Zhao, Qianxin Wang, Yamin Dang, ZhiGang Yu   +4 more
openaire   +2 more sources