Results 41 to 50 of about 164,653 (221)

Multiple satellite and ground clock sources‐based high‐precision time synchronization and lossless switching for distribution power system

IET Communications, Volume 17, Issue 18, Page 2041-2052, November 2023., 2023
In this paper, we construct a multi‐clock source time synchronization model and formulate a problem to minimize the synchronization error and delay through jointly optimizing large‐timescale clock source selection and small‐timescale weight selection. A reinforcement learning‐based multi‐timescale multi‐clock source time synchronization algorithm named
Pengju Liu, Sunxun Zhang, Zhenyu Zhou, Lei Lv, Lin Huang, Jiayu Liu   +5 more
wiley   +1 more source

An Analysis on the Long-Term Variation of the GPS Broadcast Ephemeris Errors

The Journal of Korea Navigation Institute, 2014
Mingyu Kim, Jeongrae Kim
openalex   +4 more sources

First Observations With a GNSS Antenna to Radio Telescope Interferometer

Radio Science, Volume 58, Issue 8, August 2023., 2023
Abstract We describe the design of a radio interferometer composed of a Global Navigation Satellite Systems (GNSS) antenna and a Very Long Baseline Interferometry radio telescope. Our eventual goal is to use this interferometer for geodetic applications including local tie measurements.
J. Skeens, J. York, L. Petrov, D. Munton, K. Herrity, R. Ji‐Cathriner, S. Bettadpur, T. Gaussiran   +7 more
wiley   +1 more source

Real‐time precise orbit determination for FY‐3C and FY‐3D based on BDS and GPS onboard observation

IET Radar, Sonar &Navigation, Volume 17, Issue 8, Page 1213-1229, August 2023., 2023
(1) The real‐time precise orbit determination (POD) for low earth orbit (LEO) satellites based on spaceborne global positioning system (GPS) and BDS‐2 observations are executed. (2) Code multipath piece‐wise linear (PWL) error model of BDS‐2 satellites is constructed and applied to real‐time LEO POD.
Zhiyu Wang, Liang Wang, Zishen Li, Mainul Hoque, Ningbo Wang, Dongyan Wei, Hong Yuan   +6 more
wiley   +1 more source

Improving the precision and accuracy of wildlife monitoring with multi‐constellation, multi‐frequency GNSS collars

The Journal of Wildlife Management, Volume 87, Issue 4, May 2023., 2023
This study aims to test experimentally the influence of multi‐constellation multi‐frequency modules on the performance of the GNSS collars. We applied static and kinematic tests designed to evaluate the performance and positioning improvement with a multi‐constellation multi‐frequency module on a prototype GNSS collar. The results showed that the multi‐
María S. Garrido‐Carretero, Concepción Azorit, María C. de Lacy‐Pérez de los Cobos, José Manuel Valderrama‐Zafra, Rafael Carrasco, Antonio J. Gil‐Cruz   +5 more
wiley   +1 more source

Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning

Remote Sensing, 2021
The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu, Feiyu Mao, Xiaopeng Gong, Yidong Lou, Xueyong Xu, Ye Zhou   +5 more
doaj   +1 more source

Fast GPU based acquisition with minimum loss and downsampling techniques for weak BeiDou SBAS signals

IET Radar, Sonar &Navigation, Volume 17, Issue 5, Page 916-924, May 2023., 2023
(1) This work provides a fast graphic processing unit (GPU)‐based acquisition by using minimum loss and downsampling techniques (MLD) for weak BeiDou Satellite‐Based Augmentation System (BDSBAS) signals, which applies downsampling technique and GPU acceleration to achieve fast acquisition and introduce the minimum loss strategy to improve the peak ...
Chengyao Tang, Lei Chen, Zhicheng Lv, Fang Xie, Weihua Mou   +4 more
wiley   +1 more source

Protecting Earth and Space Industries from Orbital Debris: Implementing the Outer Space Treaty to Fill the Regulatory Vacuum in the FCC's Orbital Debris Guidelines

American Business Law Journal, Volume 60, Issue 1, Page 175-229, Spring 2023., 2023
The Outer Space Treaty (OST) is the foundation of all international space regulation. It establishes space as the province of all humankind and promotes its peaceful use and exploration for the benefit and in the interests of all countries. In 2020, the FCC released its “Mitigation of Orbital Debris in the New Space Age” guidelines for commercial ...
Michael B. Runnels
wiley   +1 more source

Orbital Maneuver Analysis of BDS‐3 Satellites Based on Time‐Differenced Carrier Phase Velocity Measurement

Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023
The BeiDou‐3 global navigation satellite system (BDS‐3) has been widely used in various fields worldwide since its official launch on July 31, 2020. As of August 1, 2021, 33 satellite orbital maneuver events have occurred in BDS‐3. The satellite orbits deviate owing to external factors, and orbital maneuvers are required to adjust the orbit to ensure ...
Yage Miao, Rui Tu, Ju Hong, Shixuan Zhang, Fangxin Li, Mingyue Liu, Ardashir Mohammadzadeh   +6 more
wiley   +1 more source

Refinement of GRACE‐FO Kinematic Orbit by Combining Least Squares Method and Orbital Dynamic Model

Journal of Sensors, Volume 2023, Issue 1, 2023., 2023
Gravity Recovery and Climate Experiment Follow‐On (GRACE‐FO) satellites are used to map the gravity field of the Earth. The orbit accuracy of GRACE‐FO depends on the quality of on‐board GPS data, which is key factor affecting GRACE‐FO mission execution.
Yi Ma, Zhouming Yang, Yunbin Yuan, Qinglei Sun, Fangrong Zhou, Gang Wen, Davide Palumbo   +6 more
wiley   +1 more source