Results 21 to 30 of about 2,911,374 (253)

Real-Time Estimation of BDS-3 Satellite Clock Offset with Ambiguity Resolution Using B1C/B2a Signals

Remote Sensing
The third generation of the BeiDou navigation satellite system (BDS-3) can transmit five-frequency signals. The real-time satellite clock offset of BDS-3 is typically generated utilizing the B1I/B3I combination with the ambiguity-float solutions.
Wei Xie, Kan Wang, Wenju Fu, Shichao Xie, Bobin Cui, Mengyuan Li   +5 more
doaj   +2 more sources

Integer ambiguity validation through machine learning for precise point positioning

Satellite Navigation
The discrimination test of ambiguity resolution, also known as ambiguity validation, is a vital procedure to quantify the reliability of Global Navigation Satellite System (GNSS) ambiguity-fixed solutions. Several well-known tests, including the R-ratio,
Jiang Guo, Jianghui Geng
doaj   +2 more sources

Between-satellite ambiguity resolution based on preliminary GNSS orbit and clock information using a globally applied ambiguity clustering strategy. [PDF]

, 2023
The use of undifferenced (UD) processing schemes of GNSS measurements is becoming more and more popular for the generation of global network solutions (GNSS orbits and clock products) within the GNSS community.
Schaer, Stefan, Stefan Schaer, Dach, Rolf, Arturo Villiger, Emilio J. Calero-Rodríguez, Calero-Rodríguez, Emilio J., Rolf Dach, Adrian Jäggi, Villiger, Arturo, Jäggi, Adrian   +9 more
core   +2 more sources

Centimeter-level Positioning by Instantaneous Lidar-aided GNSS Ambiguity Resolution

, 2022
High-precision vehicle positioning is key to the implementation of modern driving systems in urban environments. Global Navigation Satellite System (GNSS) carrier phase measurements can provide millimeter- to centimeter-level positioning, provided that ...
Kourosh Khoshelham, Amir Khodabandeh, Junjie Zhang, Khoshelham, Kourosh, Zhang, Junjie, Khodabandeh, Amir   +5 more
core   +1 more source

Assessment of Multi-Frequency PPP Ambiguity Resolution Using Galileo and BeiDou-3 Signals

Remote Sensing, 2021
From network RTK to PPP-RTK, it is highly expected that high-precision positioning within a few minutes can be achieved with a sparse reference network.
Jiang Guo, Qiyuan Zhang, Guangcai Li, Kunlun Zhang   +3 more
doaj   +1 more source

Research on Tightly Coupled Multi-Antenna GNSS/MEMS Single-Frequency Single-Epoch Attitude Determination in Urban Environment

Remote Sensing, 2021
GNSS-only attitude determination is difficult to perform well in poor-satellite-tracking environments such as urban areas with high and dense buildings or trees.
Ming Gao, Genyou Liu, Shengliang Wang, Gongwei Xiao, Wenhao Zhao, Dong Lv   +5 more
doaj   +1 more source

Using Various Analysis Center Products to Assess the Time-Frequency Transfer Performance of GPS/Galileo/BDS PPPAR Methods

Remote Sensing, 2022
Numerous organizations and Analysis Centers (AC) currently offer various Ambiguity Resolution (AR) products using various methodologies. However, there are no associated studies on their use for time-frequency transfer.
Mingjun Ouyang, Xiangwei Zhu, Ruite Yi, Daqian Lyu   +3 more
doaj   +1 more source

An Efficient BDS-3 Long-Range Undifferenced Network RTK Positioning Algorithm

Remote Sensing, 2023
In 2020, the BeiDou-3 global navigation satellite system (BDS-3) was officially completed and put into service. Currently, network real-time kinematic (RTK) technology is considered the main means through which to improve the positioning accuracy of the ...
Huizhong Zhu, Jie Zhang, Jun Li, Aigong Xu   +3 more
doaj   +1 more source

Performance Analysis of Zero-Difference GPS L1/L2/L5 and Galileo E1/E5a/E5b/E6 Point Positioning Using CNES Uncombined Bias Products

Remote Sensing, 2022
The modernization of Global Navigation Satellite System (GNSS) including the transmission of signals on multiple frequencies has greatly promoted the development of the popular PPP (Precise Point Positioning) technique. A key issue of multi-frequency PPP
Lei Zhao, Paul Blunt, Lei Yang
doaj   +1 more source

Evaluation of Real-time Precise Point Positioning with Ambiguity Resolution Based on Multi-GNSS OSB Products from CNES

Remote Sensing, 2022
Ambiguity resolution (AR) is a core technology that helps to speed up convergence time and increase positioning accuracy for precise point positioning (PPP), and the performance of PPP-AR is based on the quality of ambiguity resolution products.
Shi Du, Bao Shu, Wei Xie, Guanwen Huang, Yulong Ge, Pan Li   +5 more
doaj   +1 more source