Results 31 to 40 of about 424 (165)
2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2023 Besides providing electron density profiles (EDP), GNSS Radio Occultation (GNSS-RO) measurements allow monitoring the frequency and the areas where ionospheric scintillations occur. In this work, RO measurements composing an experimental data set are processed with the back propagation (BP) method to estimate the location of sporadic E-clouds and ...
Ludwig Barbosa, Vinícius +5 more
openaire +2 more sources
A Machine Learning-Based Method for Wind Fields Forecasting Utilizing GNSS Radio Occultation Data
IEEE Access, 2022 With the development of computer technology and expanding environmental issues, machine learning has received more and more attention in the field of weather forecasting.
Xuezhao Chu +5 more
doaj +1 more source
Supervised Detection of Ionospheric Scintillation in Low-Latitude Radio Occultation Measurements
Remote Sensing, 2021 Global Navigation Satellite System (GNSS) Radio Occultation (RO) has provided high-quality atmospheric data assimilated in Numerical Weather Prediction (NWP) models and climatology studies for more than 20 years.
Vinícius Ludwig-Barbosa +5 more
doaj +1 more source
Remote SensingGlobal Navigation Satellite System (GNSS) Radio Occultation (RO) and GNSS Reflectometry (GNSS-R) are the two major spaceborne GNSS remote sensing (GNSS-RS) techniques, providing observations of atmospheric profiles and the Earth’s surface. With the rapid
Weihua Bai +11 more
doaj +1 more source
Stratospheric gravity waves in a post-limb sounder era: can GNSS-RO be used to extend the SABER QBO-driving record? [PDF]
Atmospheric Measurement TechniquesThe quasi-biennial oscillation (QBO) is a slowly repeating cycle of winds which dominates tropical lower-stratospheric dynamics and has been described as the “heartbeat of the stratosphere”. However, it is challenging to represent in weather and climate
M. Almowafy +3 more
doaj +1 more source
Correcting negatively biased refractivity below ducts in GNSS radio occultation: an optimal estimation approach towards improving planetary boundary layer (PBL) characterization [PDF]
Atmospheric Measurement Techniques, 2017 Global Navigation Satellite System (GNSS) radio occultation (RO) measurements are promising in sensing the vertical structure of the Earth's planetary boundary layer (PBL).
K.-N. Wang +3 more
doaj +1 more source
Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation
Remote Sensing, 2023 We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products.
M. M. Hoque +8 more
doaj +1 more source
Advanced Intelligent Systems, EarlyView.Artificial intelligence (AI) is reshaping autonomous mobile robot navigation beyond classical pipelines. This review analyzes how AI techniques are integrated into core navigation tasks, including path planning and control, localization and mapping, perception, and context‐aware decision‐making. Learning‐based, probabilistic, and soft‐computing methods
Giovanna Guaragnella +5 more
wiley +1 more source
Remote Sensing, 2022 The global navigation satellite system (GNSS) radio occultation (RO) is becoming an essential component of National Oceanic and Atmospheric Administration (NOAA) observation systems.
Shu-peng Ho +4 more
doaj +1 more source
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 +2 more
wiley +1 more source