Results 81 to 90 of about 1,430 (223)

Forecast analysis on satellites that need de-orbit technologies: future scenarios for passive de-orbit devices [PDF]

, 2016
Propulsion-based de-orbit is a space-proven technology; however, this strategy can strongly limit operational lifetime, as fuel mass is dedicated to the de-orbiting. In addition previous reliability studies have identified the propulsion subsystem as one
Kingston, Jennifer, Palla, Chiara
core   +2 more sources

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

Sensitivity of TDS-1 GNSS-R reflectivity to soil moisture: global and regional differences and impact of different spatial scales [PDF]

, 2018
The potential of Global Navigation Satellite Systems-Reflectometry (GNSS-R) techniques to estimate land surface parameters such as soil moisture (SM) is experimentally studied using 2014-2017 global data from the UK TechDemoSat-1 (TDS-1) mission.
Camps Carmona, Adriano José, Hyuk, Park, Portal González, Gerard, Rossato, Luciana, Vall-llossera, M.   +4 more
core   +2 more sources

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

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

NASA Report on Cal/Val Activities [PDF]

NASA report on Calibration/Validation activities, including recent launches of ICESat-2, GEDI and OCO ...
Thome, K.
core   +1 more source

Benefits of using mobile ad-hoc network protocols in federated satellite systems for polar satellite missions [PDF]

, 2018
© 2018 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 ...
Calveras Augé, Anna M., Camps Carmona, Adriano José, Ruiz de Azúa Ortega, Joan Adrià   +2 more
core   +2 more sources

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

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