Results 31 to 40 of about 3,601 (172)

A Unified Model for Multi-Frequency PPP Ambiguity Resolution and Test Results with Galileo and BeiDou Triple-Frequency Observations

Remote Sensing, 2019
With the modernization of Global Navigation Satellite System (GNSS), triple- or multi-frequency signals have become available from more and more GNSS satellites. The additional signals are expected to enhance the performance of precise point positioning (
Guorui Xiao, Pan Li, Yang Gao, Bernhard Heck   +3 more
doaj   +1 more source

Kinematik PPP-AR ve Geleneksel PPP Yöntemlerin Performanslarının Değerlendirilmesi: Antarktika Yarımadası Örneği

Afyon Kocatepe University Journal of Sciences and Engineering, 2019
PPP (Precise Point Positioning-Hassas Nokta Konumlama) yontemi ile hem statik hem de kinematik modda tek GNSS (Global Navigation Satellite Systems) alicisi ile bagil (rolatif) konum belirleme yontemine oldukca yakin bir seviyede konum bilgisi elde edilebilmektedir.
BEZCİOĞLU, Mert, YİĞİT, Cemal Özer, BODUR, Mehmet Nuri   +2 more
openaire   +4 more sources

Assessing the Performance of Multipath Mitigation for Multi-GNSS Precise Point Positioning Ambiguity Resolution

Remote Sensing, 2023
Real-time GNSS PPP is commonly used for high-precision positioning, but its utility is constrained by factors that necessitate extended convergence periods for a dependable accuracy.
Kai Zheng, Lingmin Tan, Kezhong Liu, Mozi Chen, Xuming Zeng   +4 more
doaj   +1 more source

Assessment of the PPP-AR Strategy for ZTD and IWV in Africa: A One-Year GNSS Study

Atmosphere
With the increasing demand for near real-time atmospheric water vapor monitoring, this study evaluates the performance of the open-source PRIDE PPP-AR software (version 3.0.5) for retrieving Zenith Total Delay (ZTD) and Integrated Water Vapor (IWV) over ...
Moustapha Gning Tine, Pierre Bosser, Ngor Faye, Lila Jean-Louis, Mapathé Ndiaye   +4 more
doaj   +1 more source

Improved PPP Ambiguity Resolution with the Assistance of Multiple LEO Constellations and Signals

Remote Sensing, 2019
The fusion of low earth orbit (LEO) constellation and Global Navigation Satellite Systems (GNSS) can increase the number of visible satellites and optimize spatial geometry, which is expected to improve the performance of precise point positioning (PPP ...
Xin Li, Xingxing Li, Fujian Ma, Yongqiang Yuan, Keke Zhang, Feng Zhou, Xiaohong Zhang   +6 more
doaj   +1 more source

Estimation of fractional cycle bias for GPS/BDS-2/Galileo based on international GNSS monitoring and assessment system observations using the uncombined PPP model

Satellite Navigation, 2021
The Fractional Cycle Bias (FCB) product is crucial for the Ambiguity Resolution (AR) in Precise Point Positioning (PPP). Different from the traditional method using the ionospheric-free ambiguity which is formed by the Wide Lane (WL) and Narrow Lane (NL)
Jin Wang, Qin Zhang, Guanwen Huang
doaj   +1 more source

Roll‐to‐Roll Mechanical Exfoliation for Large‐Area van der Waals Films with Preserved Crystallographic Alignment

Advanced Functional Materials, EarlyView.
A roll‐to‐roll exfoliation method is demonstrated that preserves the crystallographic alignment of anisotropic 2D materials over large areas, enabling scalable fabrication of directional electronic and optoelectronic devices. Abstract Anisotropic 2D materials such as black phosphorus (BP), GeS or CrSBr, exhibit direction‐dependent optical and ...
Esteban Zamora‐Amo, Francisco Fernandez‐Canizares, Yigit Sozen, Thomas Pucher, Pedro L Alcázar Ruano, Carmen Munuera, Ryo Ishikawa, Naoya Shibata, María Varela, Der‐Yuh Lin, Bing Wu, Jorge Quereda, Zdenek Sofer, Gabriel Sánchez‐Santolino, Andres Castellanos‐Gomez   +14 more
wiley   +1 more source

Cube: An Open-Source Software for Clock Offset Estimation and Precise Point Positioning with Ambiguity Resolution

Remote Sensing
Precise point positioning (PPP) is a prevalent, high-precision spatial absolution positioning method, and its performance can be enhanced by ambiguity resolution (AR).
Shuai Liu, Yunbin Yuan, Xiaosong Guo, Kezhi Wang, Gongwei Xiao   +4 more
doaj   +1 more source

Germanane Quantum Dots Promote Metabolic Reprogramming of Immune Cells Toward Regulatory T Cells and Suppress Inflammation In Vitro and In Vivo

Advanced Functional Materials, EarlyView.
Metabolic changes in immune cells direct the phenotype and function of the host immune system. Smart nanomaterials must target metabolic pathways to direct immune cell fate. This study reports the fabrication and first application of germanane quantum dots (GeHQDs) to modulate inflammation in vitro and in vivo.
Abhay Srivastava, Alireza Rafieerad, Weiang Yan, Keshav Narayan Alagarsamy, Qingdong Guan, Leena Regi Saleth, Michel Aliani, Sanjiv Dhingra   +7 more
wiley   +1 more source

Continuous GPS PPP-AR frequency transfer links

Metrologia
Abstract In this paper, we show that the SPARK software of the Natural Resources Canada (NRCan) with their DCR (Decoupled Clock Rapid) products can be used to generate the PPP-AR continuous batch clock solutions of multiple days, which we use to build frequency transfer links between two remotely located GPS receivers.
Bin Jian, Marina Gertsvolf
openaire   +1 more source