Results 61 to 70 of about 333 (162)

Assessment of CYGNSS Wind Speed Retrieval Uncertainty

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
Measurements of near surface wind speed made by the Cyclone Global Navigation Satellite System (CYGNSS) constellation of GNSS-R satellites are evaluated and their uncertainty is assessed in two ways. A bottom-up assessment begins with a model for the error in engineering measurements and propagates that error through the wind speed retrieval algorithm ...
Christopher S. Ruf, Scott Gleason, Darren S. McKague   +2 more
openaire   +1 more source

The Potential of Hydrogeodesy to Address Water‐Related and Sustainability Challenges

Water Resources Research, Volume 60, Issue 11, November 2024.
Abstract Increasing climatic and human pressures are changing the world's water resources and hydrological processes at unprecedented rates. Understanding these changes requires comprehensive monitoring of water resources. Hydrogeodesy, the science that measures the Earth's solid and aquatic surfaces, gravity field, and their changes over time ...
Fernando Jaramillo, Saeid Aminjafari, Pascal Castellazzi, Ayan Fleischmann, Etienne Fluet‐Chouinard, Hossein Hashemi, Clara Hubinger, Hilary R. Martens, Fabrice Papa, Tilo Schöne, Angelica Tarpanelli, Vili Virkki, Lan Wang‐Erlandsson, Rodrigo Abarca‐del‐Rio, Adrian Borsa, Georgia Destouni, Giuliano Di Baldassarre, Michele‐Lee Moore, José Andrés Posada‐Marín, Shimon Wdowinski, Susanna Werth, George H. Allen, Donald Argus, Omid Elmi, Luciana Fenoglio, Frédéric Frappart, Xander Huggins, Zahra Kalantari, Simon Munier, Sebastián Palomino‐Ángel, Abigail Robinson, Kristian Rubiano, Gabriela Siles, Marc Simard, Chunqiao Song, Christopher Spence, Mohammad J. Tourian, Yoshihide Wada, Chao Wang, Jida Wang, Fangfang Yao, Wouter R. Berghuijs, Jean‐François Cretaux, James Famiglietti, Alice Fassoni‐Andrade, Jessica V. Fayne, Félix Girard, Matti Kummu, Kristine M. Larson, Martin Marañon, Daniel M. Moreira, Karina Nielsen, Tamlin Pavelsky, Francisco Pena, J. T. Reager, Maria Cristina Rulli, Juan F. Salazar   +56 more
wiley   +1 more source

Machine learning‐driven microwave imaging for soil moisture estimation near leaky pipe

Electronics Letters, Volume 60, Issue 21, November 2024.
This paper introduces a system for determining the local soil moisture percentage in the vicinity of buried pipelines, utilizing microwave imaging and machine learning tools. Abstract Characterizing soil moisture around drip irrigation pipes is crucial for precise and optimized farming.
Mohammad Ramezaninia, Mohammadreza Shams, Mohammad Zoofaghari   +2 more
wiley   +1 more source

Diurnal Vegetation Moisture Cycle in the Amazon and Response to Water Stress

Geophysical Research Letters, Volume 51, Issue 19, 16 October 2024.
Abstract Water stress in the Amazon is exacerbated by rising temperatures and reduced moisture levels. However, understanding forest responses to increased aridity is hindered by limited in situ water potential observations in the Amazon. Remote sensing of water content has emerged as a promising metric.
Milad Asgarimehr, Dara Entekhabi, Adriano Camps   +2 more
wiley   +1 more source

Capturing Urban Heterogeneity Enhances Tropical Cyclones Simulation in Houston

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 19, 16 October 2024.
Abstract Urbanization in the coastal region has increased socioeconomic losses from landfalling tropical cyclones (TCs). Although previous studies have explored the broad impacts of urbanization on TCs, the effect of heterogeneity caused by local intra‐urban variability has not been examined.
K. Y. Fung, Z.‐L. Yang, D. Niyogi
wiley   +1 more source

Comprehensive Evaluation of Using TechDemoSat-1 and CYGNSS Data to Estimate Soil Moisture over Mainland China

Remote Sensing, 2020
Spaceborne Global Navigation Satellite System Reflectometry (GNSS-R) provides a new opportunity for land observation. This study is the first to compare and evaluate the performance of the only two spaceborne GNSS-R satellite missions whose data are ...
Ting Yang, Wei Wan, Zhigang Sun, Baojian Liu, Sen Li, Xiuwan Chen   +5 more
doaj   +1 more source

Underestimation of Methane Emissions From the Sudd Wetland: Unraveling the Impact of Wetland Extent Dynamics

Geophysical Research Letters, Volume 51, Issue 16, 28 August 2024.
Abstract Tropical wetlands account for ∼20% of the global total methane (CH4) emissions, but uncertainties remain in emission estimation due to the inaccurate representation of wetland spatiotemporal variations. Based on the latest satellite observational inundation data, we constructed a model to map the long‐term time series of wetland extents over ...
Bogang Dong, Shushi Peng, Gang Liu, Tianjiao Pu, Cynthia Gerlein‐Safdi, Catherine Prigent, Xin Lin   +6 more
wiley   +1 more source

Impacts of Spaceborne GNSS-R System Observations on Storm Surge Prediction: A Hurricane Harvey Case Study Using CYGNSS Full DDM Downlinks

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This work assesses the impact of the Cyclone Global Navigation Satellite System (CYGNSS) (full delay-Doppler map) informed wind fields on storm surge simulations using the constellation's storm observations.
Younghun Kang, Ethan Kubatko, Mohammad M. Al-Khaldi, Joel T. Johnson, Suranjan Nepal, Aaron Sines   +5 more
doaj   +1 more source

The Longwave Cloud‐Radiative Feedback in Tropical Waves Derived by Different Precipitation Data Sets

Geophysical Research Letters, Volume 51, Issue 11, 16 June 2024.
Abstract Anomalous tropical longwave cloud‐radiative heating of the atmosphere is generated when convective precipitation occurs, which plays an important role in the dynamics of tropical disturbances. Defining the observed cloud‐radiative feedback as the reduction of top‐of‐atmosphere longwave radiative cooling per unit precipitation, the feedback ...
Wei‐Ting Hsiao, Eric D. Maloney
wiley   +1 more source

Daily Soil Moisture Retrieval by Fusing CYGNSS and Multi-Source Auxiliary Data Using Machine Learning Methods. [PDF]

Sensors (Basel), 2023
Yang T, Wang J, Sun Z, Li S.
europepmc   +1 more source