Results 61 to 70 of about 3,052 (255)

GNSS integer ambiguity estimation and evaluation: LAMBDA and Ps-LAMBDA [PDF]

, 2013
Successful integer carrier-phase ambiguity resolution is crucial for high precision GNSS applications. It includes both integer estimation and evaluation.
Sandra Verhagen, Li, Bofeng, Li, B., Bofeng Li, Peter J.G. Teunissen, Teunissen, Peter, Verhagen, A.A. (author), Teunissen, P.J.G. (author), Li, B. (author), Teunissen, P.J.G., Verhagen, S., Verhagen, A.A.   +11 more
core   +2 more sources

Bias-constrained integer least squares estimation: distributional properties and applications in GNSS ambiguity resolution [PDF]

To accommodate the presence of bounded biases in mixed-integer models, Khodabandeh (2022) extended integer estimation theory by introducing a new admissible integer estimator. The estimator follows the principle of integer least squares estimation and is
Khodabandeh, A. (author), Teunissen, P.J.G. (author)   +1 more
core   +3 more sources

Detailed Investigation on Ambiguity Validation of Long-Distance RTK

Remote Sensing
Long-distance Real-Time Kinematic (RTK) positioning is crucial for applications in remote areas, such as maritime environments. Achieving 2–3 cm accuracy with RTK requires successful ambiguity resolution, which involves two main steps: identifying the ...
Shengyue Ji, Jing Wang, Duojie Weng, Wu Chen   +3 more
doaj   +1 more source

The Inertial Attitude Augmentation for Ambiguity Resolution in SF/SE-GNSS Attitude Determination

Sensors, 2014
The Unaided Single Frequency/Single Epoch Global Navigation Satellite System (SF/SE GNSS) model is the most challenging scenario for ambiguity resolution in the GNSS attitude determination application.
Jiancheng Zhu, Xiaoping Hu, Jingyu Zhang, Tao Li, Jinling Wang, Meiping Wu   +5 more
doaj   +1 more source

ON THE REALISTIC STOCHASTIC MODEL OF GPS OBSERVABLES: IMPLEMENTATION AND PERFORMANCE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
High-precision GPS positioning requires a realistic stochastic model of observables. A realistic GPS stochastic model of observables should take into account different variances for different observation types, correlations among different observables ...
F. Zangeneh-Nejad, A. R. Amiri-Simkooei, M. A. Sharifi, J. Asgari   +3 more
doaj   +1 more source

ESG Disclosure Quality as Organizational Information Processing: Comparing Human Coding, Rule‐Based Automation, and LLM Semantic Scoring

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines how different scoring architectures evaluate the same ESG disclosure text and produce different ESG disclosure‐quality scores. Using sustainability‐related reports published by Korean listed firms during 2020–2021, the study compares three approaches: Human‐ESG based on a structured nine‐item disclosure‐quality rubric, Rule‐
Jaehyun Park
wiley   +1 more source

A Simple Sequential Method for Integer Ambiguity Resolution in Real-Time GNSS Positioning [PDF]

, 2008
The successful resolution of integer ambiguities in Global Navigation Satellite System (GNSS) carrier-phase measurements is an essential but challenging task, especially where real-time kinematic (RTK) positioning is concerned.
Lim, S ; https://orcid.org/, Zhang, S, Rizos, C ; https://orcid.org/   +2 more
core   +2 more sources

Optimal Carrier-Phase Integer Combinations for Modernized Triple-Frequency BDS in Precise Point Positioning

IEEE Access, 2019
The latest generation of Global Navigation Satellite System (GNSS) satellites are transmitting signals on three or more frequencies, it brings new opportunities and challenges for data integration in Multi-GNSS Experiment (MGEX).
Honglei Qin, Peng Liu, Jiaqing Qu, Li Cong   +3 more
doaj   +1 more source

A Graph‐Based Generative Artificial Intelligence Methodology for Autocorrection of Utility‐System P&IDs

Chemie Ingenieur Technik, EarlyView.
This work explores generative AI for automated revision of Piping and Instrumentation Diagrams (P&IDs). We frame P&ID correction as a translation problem, converting attributed P&ID graphs into sequences and learning revisions with a transformer‐based model.
Lukas Schulze Balhorn, Dominik P. Goldstein, Niels Seijsener, Kevin Dao, Ge H. M. Driessen, Artur M. Schweidtmann   +5 more
wiley   +1 more source

Carrier phase integer ambiguity resolution with Inequality Constraints for GPS and Galileo [PDF]

, 2011
Galileo and GPS receivers can measure the carrier phases with millimeter accuracy. However, the carrier phases are periodic which requires the resolution of an integer ambiguity for each satellite.
P. Henkel and C. Zhu
core