Results 61 to 70 of about 4,147 (202)

Performance evaluation of a typical low-cost multi-frequency multi-GNSS device for positioning and navigation in agriculture – Part 1: Static testing

Smart Agricultural Technology, 2021
This paper evaluates and compares the static performance of low-cost and legacy geodetic multi-frequency multi-GNSS positioning device (PD) in terms of the GNSS signal strength, RTK (Real-Time-Kinematic) availability and positioning accuracy, and time to
Nang Van Nguyen, Wonjae Cho, Kazunobu Hayashi   +2 more
doaj   +1 more source

Peer PPP-RTK: toward an affordable real-time high accuracy service [PDF]

, 2022
The objective of this thesis is to develop, test and analyze the performance of a high accuracy GNSS PPP-RTK (Precise Point Positioning- Real Time Kinematic) operational framework based on a dense network of peer users, through the exchange of precise ...
Capua, Roberto
core   +1 more source

Multipath Error Determinant for Pseudo Ranges Observation Data at RTK (Real Time Kinematic) Reference Stations in Malaysia

Jurnal Kejuruteraan, 2010
La multitrayectoria es ampliamente reconocida como una de las principales fuentes de error en las aplicaciones GPS. La multitrayectoria es el fenómeno por el cual una señal llega a un receptor a través de múltiples rutas atribuibles a la reflexión y la difracción.
Mardina Abdullah, Norbahiah Misran, Nor Nadira Mohammad Ariff   +2 more
openaire   +1 more source

Forensic Hydraulic Analysis of Floodplain Connectivity Driven by Historical Beaver Dams in Colorado Headwater Streams

River Research and Applications, EarlyView.
ABSTRACT As ecosystem engineers, beavers (Castor canadensis) modify river corridor form through dam building. When beavers are removed from a river corridor, their unmaintained dams wash out, altering the stream's hydrologic regime. The assumption that beaver dams increase floodplain connectivity is frequently presumed but has not been directly ...
Kayla Schultz, Ryan R. Morrison, Sara Rathburn, Connor Mertz, Nicholas Christensen   +4 more
wiley   +1 more source

Classification of tree species and standing dead trees in Boreal forests using UAV‐based RGB, multispectral, and LiDAR point clouds

Remote Sensing in Ecology and Conservation, EarlyView.
We evaluated single‐ and multi‐sensor UAV approaches for classifying tree species and standing dead trees in boreal forests, focusing on key biodiversity indicators such as European aspen. Using spectral and structural features extracted from RGB, multispectral (MSP), and LiDAR point clouds for 1,205 field‐measured trees, we compared classification ...
Anton Kuzmin, Lauri Korhonen, Topi Tanhuanpää, Mikko Kukkonen, Matti Maltamo, Timo Kumpula   +5 more
wiley   +1 more source

A comparison of thermal drones and camera trap population estimates for Sitka black‐tailed deer in Alaska

Wildlife Biology, EarlyView.
One of the most difficult challenges for wildlife managers is reliably estimating wildlife populations. Camera traps combined with spatial capture–recapture (SCR) models are a popular tool for population estimation. They have limitations, however, including long data processing times.
Shannon P. Finnegan, Amael Hinojo, Sarah Monod, William A. Wall, Peter Olsen, Maximilian L. Allen   +5 more
wiley   +1 more source

RTK with the Assistance of an IMU-Based Pedestrian Navigation Algorithm for Smartphones

Sensors, 2019
Real-time kinematic (RTK) technique is widely used in modern society because of its high accuracy and real-time positioning. The appearance of Android P and the application of BCM47755 chipset make it possible to use single-frequency RTK and dual ...
Zun Niu, Ping Nie, Lin Tao, Junren Sun, Bocheng Zhu   +4 more
doaj   +1 more source

GNSS-RTK Adaptively Integrated with LiDAR/IMU Odometry for Continuously Global Positioning in Urban Canyons

Applied Sciences, 2022
Global Navigation Satellite System Real-time Kinematic (GNSS-RTK) is an indispensable source for the absolute positioning of autonomous systems. Unfortunately, the performance of the GNSS-RTK is significantly degraded in urban canyons, due to the ...
Jiachen Zhang, Weisong Wen, Feng Huang, Yongliang Wang, Xiaodong Chen, Li-Ta Hsu   +5 more
doaj   +1 more source

Seasonal variations and challenges in estimating populations and identifying species of Korean ungulates using drone‐derived thermal orthomosaic maps

Wildlife Biology, EarlyView.
Drones equipped with thermal infrared (TIR) cameras offer significant time and labor savings in estimating wild ungulate populations. However, accurately monitoring forest‐dwelling ungulates remains challenging due to their elusive behavior and complex habitat.
Jinhwi Kim, Donggul Woo
wiley   +1 more source

Sviluppo di un sistema di localizzazione real-time GPS-RTK [PDF]

, 2023
Il seguente elaborato illustrerà il funzionamento di un sistema GPS-RTK (Real Time Kinematic), attraverso l'utilizzo del kit hardware C94-M8P (u-blox).
Manole, Denis Alexandru
core