Results 71 to 80 of about 8,142 (251)

Predictive intelligence for a rail traffic management system [PDF]

, 2017
As the demands on terrestrial transport systems increase, there is a growing need for greater efficiencies. More intelligent mobility and ultimately autonomous transport assets will deliver these efficiencies through the evolution of cooperative ...
Bonenberg, Lukasz, Hill, Chris, Meng, Xiaolin, Moore, Terry, Roberts, Simon   +4 more
core   +1 more source

Thermal drone observations capture fine‐scale population decline of short‐tailed shearwaters

Remote Sensing in Ecology and Conservation, Volume 11, Issue 6, Page 773-789, December 2025.
Researchers used thermal drone technology to monitor short‐tailed shearwater colonies in Tasmania from 2019 to 2024, discovering a concerning 27% decline in chick numbers during this period. The study estimates that the global population of these seabirds has dropped dramatically by 41% since 1985, falling from 23 million to approximately 13.5 million ...
Jacob Virtue, Darren Turner, Guy Williams, Stephanie Zeliadt, Arko Lucieer   +4 more
wiley   +1 more source

The Analysis of the Ionospheric Radio Occultation Data Coverage for ANCHOR Ionospheric Data Assimilation

Space Weather, Volume 23, Issue 12, December 2025.
Abstract The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC‐1 and COSMIC‐2) missions provide global observations of atmospheric and ionospheric conditions using Global Navigation Satellite System (GNSS) radio occultation (RO).
Victoriya V. Forsythe, Jan‐Peter Weiss, Irfan Azeem, William Gullotta, Sarah E. McDonald, Katherine A. Zawdie, Emily C. Morgan, Douglas P. Drob   +7 more
wiley   +1 more source

Research on satellite selection algorithm in ship positioning based on both geometry and geometric dilution of precision contribution

International Journal of Advanced Robotic Systems, 2019
With the networking of four Global Navigation Satellite Systems, the combination of multi-constellation applications has become an inevitable trend, and there will be more and more visible satellites that can be participated in ship positioning. However,
Pengfei Zhang
doaj   +1 more source

Sub‐Seasonal Impact of GNSS Radio Occultation Data

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract This study investigates for the first time whether the assimilation of the Global Navigation Satellite System Radio occultation (GNSS‐RO) data has a significant impact on the European Centre for Medium‐Range Weather Forecasts sub‐seasonal forecasts.
K. Lonitz, F. Vitart, S. B. Healy, Qiang Fu   +3 more
wiley   +1 more source

Solar Wind and Geomagnetic Conditions That Lead to the Largest Relativistic Electron Fluxes in GPS Orbit

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Relativistic electrons are an important space weather hazard, being a major source of radiation damage to satellites and posing a risk to humans in space. We use approximately 20 years of data from the US Global Positioning System (GPS) satellite NS41 to determine the characteristics of the geomagnetic storms that lead to the largest ...
Nigel P. Meredith, Jacob Bortnik, Man Hua, Thomas E. Cayton, Mark A. Clilverd, Tom A. Daggitt, Kaine A. Bunting   +6 more
wiley   +1 more source

Implementation of a GNSS-R payload based on software defined radio for the 3CAT-2 mission [PDF]

, 2016
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Amézaga Sarries, Adrià, Camps Carmona, Adriano José, Carreno-Luengo, Hugo, Hyuk, Park, Olivé Muñiz, Roger   +4 more
core   +2 more sources

Impacts of Space Weather‐Induced Satellite Navigation Errors on UAV Collision Risk: An Estimation for Parallel and Crossing Routes

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Satellite navigation systems are vulnerable to space weather disturbances, which can degrade positioning accuracy and potentially increase the collision risk of unmanned aerial vehicles (UAVs). This study investigates the influence of navigation errors caused by ionospheric scintillation on UAV encounter scenarios. Two route configurations are
Dabin Xue, Chengpeng Jiang, Shiwei Yu, Zhe Yang, Jialing Liu   +4 more
wiley   +1 more source

Space-Time Reference with an Optical Link

, 2015
We describe a method for realizing a high-performance Space-Time Reference (STR) using a stable atomic clock in a precisely defined orbit and synchronizing the orbiting clock to high-accuracy atomic clocks on the ground.
Berceau, Paul, Hollberg, Leo, Kahn, Joseph M., Taylor, Michael   +3 more
core   +1 more source

M‐SADR: Mobile Self Adaptive Data Rate for Enhanced LoRa End‐Device Connectivity on the Move

International Journal of Communication Systems, Volume 38, Issue 15, October 2025.
The proposed M‐SADR method targets mobile LoRa end‐devices and achieves better performance, with a 2.4% improvement in packet delivery ratio and a 5.7% reduction in power consumption per successfully delivered packet. ABSTRACT Mobility is a critical aspect of the Internet of Things, reflecting the diverse and dynamic nature of potential applications ...
Vasileios Moysiadis, Panagiotis Radoglou‐Grammatikis, Evangelos Mourikis, Maria Zevgara, Dimitrios N. Skoutas, Charalabos Skianis, Panagiotis Sarigiannidis   +6 more
wiley   +1 more source