Results 151 to 160 of about 8,117 (279)

GNSS-R missions with IEEC participation

, 2021
Ponencia expuesta en el 3r Fòrum de l'IEEC (2021) el 10 de junio.
openaire   +1 more source

TriG - A GNSS Precise Orbit and Radio Occultation Space Receiver [PDF]

, 2009
The GPS radio occultation (RO) technique [1] produces measurements in the ionosphere and neutral atmosphere [2] that contribute to monitoring space weather and climate change; and improving operational weather prediction.
Esterhuizen, Stephan, Franklin, Garth, Hurst, Ken, Mannucci, Anthony, Meehan, Tom, Webb, Frank, Young, Larry   +6 more
core  

Applying Hpo Indices to Empirical Thermospheric Density Models During Geomagnetic Storms

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Accurate atmospheric drag modeling is essential for precise orbit determination and prediction of Low Earth Orbit satellites. A key component is the thermospheric density, typically estimated using empirical models driven by geomagnetic activity indices such as the 3‐hr Kp or ap.
Kemin Zhu, Jizhang Sang, Xianjie Li, Lei Liu, Yangbo Qian, Shengfu Xia   +5 more
wiley   +1 more source

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Using Agricultural Production to Evaluate the Novel Method of Reducing the Uncertainty in GNSS-R Soil Moisture Retrieval

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Soil moisture (SM) is one of the important driving factors for promoting photosynthesis of vegetation to produce organic carbon. Global satellite navigation system reflectometry (GNSS-R) has considerable potential in monitoring regional SM due to its ...
Yan Li, Songhua Yan, Ruonan Qiu, Jianya Gong, Wei Wang   +4 more
doaj   +1 more source

Testing Volcano Deformation Models Against 3D Seismic Reflection Imagery of Ancient Intrusions

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract Magma intrusion often drives uplift of the overburden and free surface. Analytical modeling of such surface uplift at active volcanoes allows us to estimate intrusion geometries and positions, as well as volume and pressure changes; these insights have proven critical to forecasting volcanic unrest and eruptions. However, it is rarely possible
C. Magee, S. K. Ebmeier, J. Hickey
wiley   +1 more source

A Real-Time Prediction Approach to Deep Soil Moisture Combining GNSS-R Data and a Water Movement Model in Unsaturated Soil [PDF]

Xiaotian Luo, Cong Yin, Yueqiang Sun, Weihua Bai, Wei Li, Hongqing Song   +5 more
openalex   +1 more source

Thresholds of Wave Forcing: Implications for Atoll Reef Dynamics Under Sea Level Rise

Journal of Geophysical Research: Oceans, Volume 131, Issue 2, February 2026.
Abstract We investigate the response of shallow reef flow to tidal variability and wave exposure during a 4‐month field campaign in southern Huvadhu Atoll, Maldives. Incident waves breaking on steep fore reefs and reef crests generate a setup proportional to offshore wave height that drives a cross‐reef flow. We emphasize a critical threshold—where the
M. Lindhart, G. Masselink, A. Holsclaw, T. Scott   +3 more
wiley   +1 more source

A Novel Deep Learning Approach for TEC Map Completion Using Image Equation‐Guided Loss

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract This study introduces the Image Equation Mechanism‐Completion Generative Adversarial Network (IEM‐CGAN), a groundbreaking deep learning framework that revolutionizes the reconstruction of large‐scale global ionospheric total electron content (TEC) maps.
Qingfeng Li, Hanxian Fang, Chao Xiao, Die Duan, Hongtao Huang, Ganming Ren, Xuhui Shen   +6 more
wiley   +1 more source

Retrieving Ocean Surface Wind Speeds in Real Time on Spaceborne GNSS-R Receivers: Algorithm and Validation

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Based on delay-Doppler maps (DDMs) in raw counts generated by spaceborne global navigation satellite system reflectometry (GNSS-R) receivers, retrieving ocean surface wind speeds is feasible, so several spaceborne GNSS-R missions have been carried out ...
Tongsheng Qiu, Qi Zheng, Xianyi Wang, Feixiong Huang, Junming Xia, Fu Li, Zhuoyan Wang, Yueqiang Sun, Qifei Du, Weihua Bai, Yuerong Cai, Dongwei Wang, Yusen Tian, Shuangshuang Cheng   +13 more
doaj   +1 more source