Results 61 to 70 of about 2,782 (177)

Improved Tropical Cyclone Wind Estimation Using Dual‐Polarization C‐Band SAR and Machine Learning

open access: yesEarth and Space Science, Volume 13, Issue 5, May 2026.
Abstract Tropical cyclones (TCs) characterized by extreme wind speeds present severe hazards to human life and infrastructure. Spaceborne synthetic aperture radar (SAR) has emerged as a critical observational tool for TCs, owing to its all‐weather, high‐resolution imaging capabilities.
Chaogang Guo   +5 more
wiley   +1 more source

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

open access: yesEarth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones   +21 more
wiley   +1 more source

Validation Analysis of SMAP and AMSR2 Soil Moisture Products over the United States Using Ground-Based Measurements

open access: yesRemote Sensing, 2017
Soil moisture products acquired from passive satellite missions have been widely applied in environmental processes. A primary challenge for the use of soil moisture products from passive sensors is their reliability.
Xuefei Zhang   +4 more
doaj   +1 more source

Evaluation of Satellite Soil Moisture Products Against Long-Term In-Situ Observations in Southern Iran [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Soil moisture is vital for agricultural water management in semi-arid regions facing water scarcity. This study evaluated four satellite-based soil moisture products—SMAP Enhanced L3 Radiometer (9 km), SMAP 1 km downscaled (NSIDC), ASCAT SWI v3.0 (~
P. Afrasiabikia   +2 more
doaj   +1 more source

Evaluation of SMAP Freeze/Thaw Retrieval Accuracy at Core Validation Sites in the Contiguous United States

open access: yesRemote Sensing, 2018
Seasonal freeze-thaw (FT) impacts much of the northern hemisphere and is an important control on its water, energy, and carbon cycle. Although FT in natural environments extends south of 45°N, FT studies using the L-band have so far been restricted ...
Simon Kraatz   +7 more
doaj   +1 more source

SMAPs: Short Message Authentication Protocols [PDF]

open access: yes, 2017
There is a long history of authentication protocols designed for ease of human use, which rely on users copying a short string of digits. Historical examples include telex test keys and early nuclear firing codes; familiar modern examples include prepayment meter codes and the 3-digit card verification values used in online shopping.
Baqer, K   +3 more
openaire   +1 more source

Evaluation of SMOS, SMAP, ASCAT and Sentinel-1 Soil Moisture Products at Sites in Southwestern France

open access: yesRemote Sensing, 2018
This study evaluates the accuracy of several recent remote sensing Surface Soil Moisture (SSM) products at sites in southwestern France. The products used are Soil Moisture Active Passive “SMAP” (level 3: 36 km × 36 km, level 3 enhanced: 9 km × 9 km, and
Mohammad El Hajj   +8 more
doaj   +1 more source

Combining traditional hydrological models and machine learning for streamflow prediction [PDF]

open access: yesRBRH
Traditional hydrological models have been widely used in hydrologic studies, providing credible representations of reality. This paper introduces a hybrid model that combines the traditional hydrological model Soil Moisture Accounting Procedure (SMAP ...
Antonio Duarte Marcos Junior   +3 more
doaj   +1 more source

Sensory motor mismatch within the supplementary motor area in the dystonic monkey

open access: yesNeurobiology of Disease, 2008
Dystonia, a movement disorder characterized by abnormal postures, is associated in primary forms of the disease with subtle proprioceptive troubles and aberrant somatotopic representation in the somatosensory cortex (SC).
E. Cuny   +5 more
doaj   +1 more source

Validation of Remotely Sensed and Modeled Soil Moisture at Forested and Unforested NEON Sites

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Soil moisture (SM) is an important driver for forest ecosystems, creating a need for globally extensive SM information that can only be achieved with satellite-based sensors and/or process-based model.
Edward Ayres   +4 more
doaj   +1 more source

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