Results 51 to 60 of about 146,803 (321)

Impacts of inter-satellite links on the ECOM model performance for BDS-3 MEO satellites

Satellite Navigation
Inter-satellite link (ISL) plays an essential role in current and future Global Navigation Satellite System (GNSS). In this study, we investigate the impact of ISL observations on precise orbit determination for BeiDou-3 Navigation Satellite System (BDS ...
Chao Yang, Jing Guo, Xiaolong Xu, Longyu Wang, Qile Zhao   +4 more
doaj   +1 more source

Tropospheric Second-Order Horizontal Gradient Modeling for GNSS PPP

Remote Sensing, 2022
The asymmetric delay has a considerable impact on Global Navigation Satellite Systems (GNSS) Positioning, Navigation and Timing (PNT) applications. In GNSS analyses, the impacts of the asymmetric delay are commonly compensated by using the classical ...
Yaozong Zhou, Yidong Lou, Weixing Zhang, Peida Wu, Jingna Bai, Zhenyi Zhang   +5 more
doaj   +1 more source

GNSS. Romværs påvirkning på GNSS

, 2021
Global Navigation Satellite System (GNSS) blir mer og mer tatt i bruk i ulike samfunnssektorer i den hensikt å benytte seg av PNT (Position Navigation Time) informasjon. GNSS har som mange andre systemer feil og sårbarheter. Flertallet av feilene og sårbarhetene er bundet opp mot det svake satellitt signalet.
Lerø, Nils-Endre Anglevik, Trones, Andreas Engum   +1 more
openaire   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Sensitivity of GNSS-R spaceborne observations to soil moisture and vegetation [PDF]

, 2016
Global navigation satellite systems-reflectometry (GNSS-R) is an emerging remote sensing technique that makes use of navigation signals as signals of opportunity in a multistatic radar configuration, with as many transmitters as navigation satellites are
Camps Carmona, Adriano José, Foti, Giuseppe, Gommenginger, Christine, Hyuk, Park, Judge, J., Pablos Hernánez, Miriam, Pang-Wei, Liu   +6 more
core   +2 more sources

High‐Speed Altitude Regulation With Neuromorphic Camera and Lightweight Embedded Computation

Advanced Intelligent Systems, EarlyView.
Neuromorphic cameras deliver rapid, high‐dynamic‐range sensing but overwhelm embedded processors at high speeds. This work presents a lightweight, optimized Lucas–Kanade optical flow method with parallelization, gyroscopic derotation, and adaptive event slicing.
Simon L. Jeger, Alessandro Marchei, Charbel Toumieh, Dario Floreano   +3 more
wiley   +1 more source

LRMO: A Lightweight and Redundant Multi-Modal Odometry Framework for Robust Intelligent Vehicle Localization [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Reliable and robust self-localization is the essential component of intelligent vehicles (IV). Many scholarly works have been focused on developing accurate multi-modal integrated pose estimation schemes.
X. Dai, L. Chen, Z. Tu, S. Zheng, S. Zhou, F. Lin, W. Song   +6 more
doaj   +1 more source

Artificial Intelligence in Autonomous Mobile Robot Navigation: From Classical Approaches to Intelligent Adaptation

Advanced Intelligent Systems, EarlyView.
Artificial intelligence (AI) is reshaping autonomous mobile robot navigation beyond classical pipelines. This review analyzes how AI techniques are integrated into core navigation tasks, including path planning and control, localization and mapping, perception, and context‐aware decision‐making. Learning‐based, probabilistic, and soft‐computing methods
Giovanna Guaragnella, Angelo Cardellicchio, Cosimo Patruno, Massimiliano Nitti, Nicola Pedrocchi, Vito Renò   +5 more
wiley   +1 more source

Cutting Through the Green: A Case for Grassland Archaeology Using UAV Multispectral Data

Archaeological Prospection, EarlyView.
ABSTRACT Advances in low‐altitude remote sensing are needed to improve the effectiveness of archaeological prospection in the Netherlands. The geomorphological situation and land use history make applying various remote sensing and geophysical technologies particularly challenging.
Roeland Emaus
wiley   +1 more source

Characteristics of BD3 Global Service Satellites: POD, Open Service Signal and Atomic Clock Performance

Remote Sensing, 2019
The Chinese BeiDou Navigation Satellite System has provided a global-coverage service since 27 December 2018. Eighteen BD3 MEO satellites have been launched into space during 2017 and 2018.
Xiaolong Xu, Xilong Wang, Jingnan Liu, Qile Zhao   +3 more
doaj   +1 more source