Results 51 to 60 of about 153,073 (196)

Pedestrian Dead Reckoning Based on Motion Mode Recognition Using a Smartphone

Sensors, 2018
This paper presents a pedestrian dead reckoning (PDR) approach based on motion mode recognition using a smartphone. The motion mode consists of pedestrian movement state and phone pose.
Boyuan Wang, Xuelin Liu, Baoguo Yu, Ruicai Jia, Xingli Gan   +4 more
doaj   +1 more source

Enhanced Heuristic Drift Elimination with Adaptive Zero-Velocity Detection and Heading Correction Algorithms for Pedestrian Navigation

Sensors, 2020
As pedestrian dead-reckoning (PDR), based on foot-mounted inertial sensors, suffers from accumulated error in velocity and heading, an improved heuristic drift elimination (iHDE) with a zero-velocity update (ZUPT) algorithm was proposed for ...
Ruihui Zhu, Yunjia Wang, Baoguo Yu, Xingli Gan, Haonan Jia, Boyuan Wang   +5 more
doaj   +1 more source

Precise Orbit Determination of LEO Satellite Using Dual-Frequency GPS Data [PDF]

Journal of Astronomy and Space Sciences, 2009
KOrea Multi-purpose SATellite (KOMPSAT)-5 will be launched at 550km altitude in 2010. Accurate satellite position (20 cm) and velocity (0.03 cm/s) are required to treat highly precise Synthetic Aperture Radar (SAR) image processing.
Yoola Hwang, Byoung-Sun Lee, Jaehoon Kim, Jae-Cheol Yoon   +3 more
doaj   +1 more source

Local positioning system as a classic alternative to atomic navigation [PDF]

, 2021
B. Dubetsky
openalex   +1 more source

A Minimal Solution Estimating the Position of Cameras with Unknown Focal Length with IMU Assistance

Drones
Drones are typically built with integrated cameras and inertial measurement units (IMUs). It is crucial to achieve drone attitude control through relative pose estimation using cameras. IMU drift can be ignored over short periods.
Kang Yan, Zhenbao Yu, Chengfang Song, Hongping Zhang, Dezhong Chen   +4 more
doaj   +1 more source

Comparison of Satellite Repeat Shift Time for GPS, BDS, and Galileo Navigation Systems by Three Methods

Algorithms, 2019
The characteristic of the satellite repeat shift time can reflect the status of the satellite operation, and is also one of the key factors of the sidereal filtering multipath correction.
Yanxi Yang, Jinguang Jiang, Mingkun Su
doaj   +1 more source

Analysis of the Dihedral Corner Reflector’s RCS Features in Multi-Resource SAR

Applied Sciences
Artificial corner reflectors are widely used in the vegetated landslide for time series InSAR monitoring due to their permanent scattering features. This paper investigated the RCS features of a novel dihedral CR under multi-resource SAR datasets. An RCS
Jie Liu, Tao Li, Sijie Ma, Yangmao Wen, Yanhao Xu, Guigen Nie   +5 more
doaj   +1 more source

An Improved WiFi Positioning Method Based on Fingerprint Clustering and Signal Weighted Euclidean Distance

Sensors, 2019
WiFi fingerprint positioning has been widely used in the indoor positioning field. The weighed K-nearest neighbor (WKNN) algorithm is one of the most widely used deterministic algorithms.
Boyuan Wang, Xuelin Liu, Baoguo Yu, Ruicai Jia, Xingli Gan   +4 more
doaj   +1 more source

Reconciling the navigational grid with the inertial navigation system [PDF]

IEEE PLANS '88.,Position Location and Navigation Symposium, Record. 'Navigation into the 21st Century'., 2003
It is remarked that the concept of a 'nonchanging north' on the navigation grid overprinted on certain small-scale navigation and planning charts published by the Defense Mapping Agency is remarkably like that encountered in an inertial navigation system with the local-level platform untorqued (alpha-wander mode).
L.D. Wanner, J. Hopkins
openaire   +1 more source

Globally Optimal Relative Pose and Scale Estimation from Only Image Correspondences with Known Vertical Direction

ISPRS International Journal of Geo-Information
Installing multi-camera systems and inertial measurement units (IMUs) in self-driving cars, micro aerial vehicles, and robots is becoming increasingly common.
Zhenbao Yu, Shirong Ye, Changwei Liu, Ronghe Jin, Pengfei Xia, Kang Yan   +5 more
doaj   +1 more source