Results 81 to 90 of about 1,130 (254)

Radar and Visual Odometry Integrated System Aided Navigation for UAVS in GNSS Denied Environment

Sensors, 2018
Drones are becoming increasingly significant for vast applications, such as firefighting, and rescue. While flying in challenging environments, reliable Global Navigation Satellite System (GNSS) measurements cannot be guaranteed all the time, and the ...
Mostafa Mostafa, Shady Zahran, Adel Moussa, Naser El-Sheimy, Abu Sesay   +4 more
doaj   +1 more source

Rapid Evolution of Super Equatorial Plasma Bubbles and X‐Pattern EIA Formation During Extreme Storm Conditions on 12 November 2025

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Extreme conditions during storms profoundly alter the evolution of equatorial plasma bubbles (EPBs), yet the key dynamics remains poorly understood. We document the rapid expansion, contraction, and decay of super EPBs in South America during the 12 November 2025 storm with Interplanetary Magnetic Field (IMF) Bz/By magnitude exceeding ∼50 nT ...
Shasha Zou, Lei Liu, Hang Liu, Anthea Coster, Robert Kerr, Jonas Souza, Angela Santos   +6 more
wiley   +1 more source

Seeking Optimal GNSS Radio Occultation Constellations Using Evolutionary Algorithms

Remote Sensing, 2019
Given the great achievements of the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission in providing huge amount of GPS radio occultation (RO) data for weather forecasting, climate research, and ionosphere monitoring,
Xiaohua Xu, Yi Han, Jia Luo, Jens Wickert, Milad Asgarimehr   +4 more
doaj   +1 more source

Comparative Analysis of 1D Var Ionospheric Electron Density Retrieval Method using GNSS RO Data

Proceedings of the 4th URSI Atlantic RadioScience Conference – AT-RASC 2024
Ishita Gulati, Henley Edmund, François‐Xavier Bocquet   +2 more
openalex   +2 more sources

Advancing GNSS-RO Detection of Ionospheric Irregularities Using Refined Back Propagation and GOLD Data

Proceedings of the 7th URSI Asia-Pacific RadioScience Conference – AP-RASC 2025
This paper investigates on the detection and localization of ionospheric irregularities using GNSS Radio Occultation (GNSS-RO). We propose a new segmented phase screen (PS) approach to improve vertical and horizontal localization and remove the presence of outliers. The study focused on the May 2024 geomagnetic solar storm is presented, consisting of a
Carles Quilis Alfonso, Vinícius Ludwig‐Barbosa, Joel Rasch, Anders Carlström, Mats I. Pettersson, Viet T. Vu   +5 more
openalex   +3 more sources

PTFE‐Activated Graphene Overcomes Dispersion Challenges for Scalable Solvent‐Free Fabrication of Ultra‐Thick, High‐Performance Cathodes in Lithium Metal Batteries

Advanced Functional Materials, Volume 36, Issue 23, 19 March 2026.
PTFE nanoparticle–anchored rGO (rGO@PTFE) for scalable solvent‐free fabrication of ultra‐thick, high‐density cathodes, achieving high conductivity (9.55 S cm−1), lithium transference (0.73), and improved wettability, is developed. The resulting cathode delivers 15.2 mAh cm−2 areal and 563 mAh cm−3 volumetric capacities, with full cells exhibiting 637 ...
Juhee Yoon, Dong Hyuk Kang, Sangmin Shin, Suyoung Yoo, Hyemin Kim, Jin‐Kyun Lee, Hyoung‐Joon Jin, Young Soo Yun   +7 more
wiley   +1 more source

Long‐Range Time‐Correlated Single‐Photon Counting Lidar 3D‐Reconstruction From a Moving Ground Vehicle

Journal of Field Robotics, Volume 43, Issue 2, Page 1178-1192, March 2026.
ABSTRACT Time‐correlated single‐photon counting (TCSPC) lidar enables high‐resolution 3D imaging at kilometer range. While previous works have covered long range TCSPC 3D imaging from either stationary or airborne platforms, this is, to the best of our knowledge, the first attempt that use a moving ground vehicle. Fusing measurements taken at different
Hannes Ovrén, Max Holmberg, Markus Henriksson   +2 more
wiley   +1 more source

Assessment of Commercial GNSS Radio Occultation Performance from PlanetiQ Mission

Remote Sensing
Global Navigation Satellite System (GNSS) radio occultation (RO) provides valuable 3-D atmospheric profiles with all-weather, all the time and high accuracy. However, GNSS RO mission data are still limited for global coverage.
Mohamed Zhran, Ashraf Mousa, Yu Wang, Fahdah Falah Ben Hasher, Shuanggen Jin   +4 more
doaj   +1 more source

Monitoring global climate change using GNSS radio occultation

npj Climate and Atmospheric Science, 2022
The emerging signal of climate change is now clearly evident in Global Navigation Satellite System (GNSS) radio occultation (RO) data, matching predictions made by climate models 15 years ago. The observed RO trends represent well-understood responses to
Hans Gleisner, Mark A. Ringer, Sean B. Healy   +2 more
doaj   +1 more source

Enhancing Low‐Latitude Ionospheric Irregularity Prediction With Generalized Linear Models

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The ionosphere poses challenges for accurate forecasting due to its complexity and variability. Irregularities in the lower ionosphere are influenced by local time, season, geographic location, solar activity and space weather, complicating precise predictions.
Alysson Brhian, Marco A. Ridenti, Francisco Azpilicueta, Mauricio Gende, Marisa Roberto   +4 more
wiley   +1 more source