Results 21 to 30 of about 61,364 (160)

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

Application of journey maps to the development of emergent sustainability‐oriented technologies: Lessons for user involvement in agriculture

Business Strategy &Development, Volume 5, Issue 3, Page 209-221, September 2022., 2022
Abstract This article foregrounds the challenges and necessity of promoting user involvement in traditional sectors, especially those that constitute strong pillars for sustainable development. As a case in point, the emergence of precision agriculture technologies requires novel methods to integrate users in innovation processes.
Débora Monteiro Moretti, Chad M. Baum, Michael Wustmans, Stefanie Bröring   +3 more
wiley   +1 more source

Signal‐in‐Space and Positioning Performance of BDS Open Augmentation Service

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
As a typical augmentation satellite system for centimeter‐level positioning, PPP (Precise Point Positioning) service based on PPP‐B2b signal of China’s new generation BeiDou system (BDS‐3) was released for Asia‐Pacific area on July, 2020. This paper first introduces the recovery theory of PPP‐B2b SSR (State Space Representation) messages and then ...
Liang Chen, Guangyu Zhou, Guo Chen, Weibin Sun, Luotian Pan, Xinyuan Jiang   +5 more
wiley   +1 more source

Modelling and Assessment of BDS‐3 Real‐time Precise Point Positioning Time Transfer Based on PPP‐B2b Service

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
In 2020, users in and around China had access to a new real‐time precise point positioning (RTPPP) service with the BeiDou global navigation satellite system (BDS‐3) B2b (PPP‐B2b) signal. In this study, the quality of PPP‐B2b products is first assessed and compared with the CNAV1 broadcast ephemeris. Then a mode of BDS‐3 PPP time transfer with PPP‐B2b (
Jian Tang, Daqian Lyu, Fangling Zeng, Yulong Ge, Runzhi Zhang, Jun Li   +5 more
wiley   +1 more source

PPP/PPP‐RTK open formats: Overview, comparison, and proposal for an interoperable message

NAVIGATION, Volume 68, Issue 4, Page 759-778, Winter 2021., 2021
Abstract This paper presents and reviews the main existing open specifications for PPP/PPP‐RTK services, including satellite navigation providers (QZSS, Galileo, BeiDou, GLONASS) and other industrial or scientific initiatives (RTCM, SAPCORDA, 3GPP, IGS).
Rui Hirokawa, Ignacio Fernández‐Hernández, Simon Reynolds   +2 more
wiley   +1 more source

Using Galileo and BDS‐3 Quad‐Frequency Signals for Long‐Baseline Instantaneous Decimeter‐Level Positioning

Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021
As the signals of Galileo and the global BDS‐3 navigation satellite system have been accessible, positioning users can use quad‐frequency even five‐frequency signals nowadays. With multifrequency signals, one can form some useful combinations to improve the positioning performance, e.g., the widely used extra‐wide‐lane (EWL)/wide‐lane (WL) in triple ...
Wang Gao, Liwei Liu, Longlei Qiao, Shuguo Pan, Chao Hu   +4 more
wiley   +1 more source

The adoption of consortium B2B e-marketplaces: An exploratory study [PDF]

, 2007
Despite the considerable number of electronic B2B marketplaces formed and the benefits cited as arising from their use, many have gone out of business.
White, Andrew, Wilson, Hugh N., Wilson, Hugh, Daniel, Elizabeth, Ward, John   +4 more
core   +1 more source

Are PPP tests erratically behaved? Some panel evidence [PDF]

, 2006
This paper examines whether, in addition to standard unit root and cointegration tests, panel approaches also produce test statistics behaving erratically when applied to PPP.
Hanck, C, Hanck, Christoph, Caporale, GM, Caporale, Guglielmo Maria   +3 more
core   +1 more source

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Comparative Analysis of Mainstream ISB Stochastic Model Characteristics for Enhancing GNSS PPP With Wuhan University Precise Products

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This study focuses on the critical challenge of selecting an overall optimal ISB stochastic model to improve GNSS PPP performance, which establishes a comprehensive assessment framework integrating positioning accuracy, convergence time, ISB characteristics, residual analysis, correlation metrics and physical mechanism interpretation.
Ban Zhao
wiley   +1 more source