Results 61 to 70 of about 195,439 (333)

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

Multi-frequency smartphone positioning performance evaluation: insights into A-GNSS PPP-B2b services and beyond

Satellite Navigation
In August 2023, Xiaomi unveiled the Redmi K60 Ultra, the first multi-frequency smartphone integrated with BeiDou-3 Navigation Satellite System Precise Point Positioning (PPP-B2b) services and employing PPP technology as the primary positioning method ...
Jiale Wang, Chuan-fang Shi, Fu Zheng, Cheng Yang, Xu Liu, Shuo Liu, Ming Xia, Guifei Jing, Tuan Li, Wu Chen, Qingcheng Li, Yong Hu, Yuan Tian, Yunfeng Shan   +13 more
semanticscholar   +1 more source

Principle and performance of multi-frequency and multi-GNSS PPP-RTK

Satellite Navigation, 2022
PPP-RTK which takes full advantages of both Real-Time Kinematic (RTK) and Precise Point Positioning (PPP), is able to provide centimeter-level positioning accuracy with rapid integer Ambiguity Resolution (AR).
Xingxing Li, Bo Wang, Xin Li, Jiaxin Huang, Hongbo Lyu, Xinjuan Han   +5 more
semanticscholar   +1 more source

Protease‐Activated Plasmonic Nanosensors for Predictive Ultrasound‐Guided Photoacoustic Imaging of Tumor Responses to Adoptive T Cell Therapy

Advanced Science, EarlyView.
Protease‐activated plasmonic nanosensors are demonstrated to noninvasively monitor antitumor T cell activity in tumors with anatomical information upon adoptive T cell transfer via ultrasound‐guided photoacoustic imaging. These nanosensors are actuated by granzyme B, a protease secreted by activated cytotoxic T cells during tumor cell killing, which ...
Myeongsoo Kim, Seoyoon Song, Ali Zamat, Paul S. Pelkowski, Shivashankar Subramanian, Melissa Cadena, Sydney Fabrega, Meredith Brienen, Jinhwan Kim, Gabriel A. Kwong, Stanislav Y. Emelianov   +10 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

Selection of the key earth observation sensors and platforms focusing on applications for Polar Regions in the scope of Copernicus system 2020-2030 [PDF]

, 2019
An optimal payload selection conducted in the frame of the H2020 ONION project (id 687490) is presented based on the ability to cover the observation needs of the Copernicus system in the time period 2020–2030.
Camps Carmona, Adriano José, Cote, Judith, Hyuk, Park, Lancheros Sepulveda, Estefany Maria, Pierotti, Stéphane, Rodríguez, Pedro, Tonetti, Stefania   +6 more
core   +2 more sources

Observations and positioning quality of low-cost GNSS receivers: a review

GPS Solutions
Over the past two decades, low-cost single-frequency Global Navigation Satellite System (GNSS) receivers have been used in numerous engineering fields and applications due to their affordability and practicality. However, their main drawback has been the
Veton Hamza, B. Stopar, Oskar Sterle, P. Pavlovčič-Prešeren   +3 more
semanticscholar   +1 more source

An Integrated GNSS/LiDAR-SLAM Pose Estimation Framework for Large-Scale Map Building in Partially GNSS-Denied Environments

IEEE Transactions on Instrumentation and Measurement, 2021
This article presents an integrated global navigation satellite system/light detection and ranging (GNSS/LiDAR)-based simultaneous localization and mapping (SLAM) pose estimation framework to perform large-scale 3-D map building in partially GNSS-denied ...
Guojian He, Xingda Yuan, Zhuang Yan, Huosheng Hu   +3 more
semanticscholar   +1 more source

Degeneracy Sensing Light Detection and Ranging‐Inertial Simultaneous Localization and Mapping with Dual‐Layer Resistant Odometry and Scan‐Context Loop‐Closure Detection Backend in Diverse Environments

Advanced Intelligent Systems, EarlyView.
This paper presents a degeneracy‐aware light detection and ranging (LiDAR)‐inertial framework that enhances LiDAR simultaneous localization and mapping performance in challenging environments. The proposed system integrates a dual‐layer robust odometry frontend with a Scan‐Context‐based loop‐closure detection backend.
Haoming Yang, Liye Zhao, Xukai Ding, Wenjun Li, Kehao Qi   +4 more
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