Results 41 to 50 of about 29,895 (213)

Tracking Water Dynamics of a Temperate Forest Under Drought and Non‐Drought Conditions Using Active and Passive Microwave and Optical Remote Sensing

open access: yesJournal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.
Abstract Water status, water dynamics, and ecohydrological resilience of a protected German beech forest during the 2018–2020 multi‐year drought are assessed using over six years of multi‐frequency remote sensing data, integrating active, passive, and optical sensors with varying canopy penetration depths, highlighting the importance of monitoring ...
Florian M. Hellwig   +10 more
wiley   +1 more source

A new method to determine multi-angular reflectance factor from lightweight multispectral cameras with sky sensor in a target-less workflow applicable to UAV

open access: yes, 2019
A new physically based method to estimate hemispheric-directional reflectance factor (HDRF) from lightweight multispectral cameras that have a downwelling irradiance sensor is presented.
Cubero-Castan, Manuel   +3 more
core   +1 more source

Observations and Simulation of Thermospheric Composition Changes During the 14 October 2023 Solar Eclipse

open access: yesGeophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract This study presents a full‐period imaging of the thermospheric composition response to the 14 October 2023 annular solar eclipse, combining GOLD (Global‐scale Observations of the Limb and Disk) far‐ultraviolet observations with solar‐irradiance‐driven WACCM‐X (Whole Atmosphere Community Climate Model with thermosphere–ionosphere extension ...
Yu Jiao   +4 more
wiley   +1 more source

Microbial Contribution to Soiling and Its Impact on Photovoltaic Module Soiling in Arid Zones of the Atacama Desert

open access: yesAdvanced Sustainable Systems, Volume 10, Issue 4, April 2026.
Microorganisms colonizing photovoltaic surfaces in the Atacama desert form biofilms that enhance particle adhesion and reduce energy yield. This study identifies UV‐resistant bacteria and carotenoid‐producing strains that interfere with PV performance.
Douglas Olivares   +8 more
wiley   +1 more source

Enhancing Millimeter-Wave Computational Interferometric Imaging

open access: yesIEEE Access, 2020
Recently a progress in computational imaging has been noticed with the potential to improve the capabilities of millimeter-wave imaging systems. In this paper, an interferometric synthetic aperture systems is considered to be the conventional approach to
Sana Abid   +3 more
doaj   +1 more source

Solar cycle variation in solar irradiance

open access: yes, 2014
The correlation between solar irradiance and the 11-year solar activity cycle is evident in the body of measurements made from space, which extend over the past four decades.
Krivova, N. A.   +2 more
core   +1 more source

Assessing Structure Collapse and Vegetation Loss After the 2025 Eaton Fire Using Optical Remote Sensing

open access: yesEarth and Space Science, Volume 13, Issue 4, April 2026.
Abstract On 7–8 January, 2025, the Eaton fire destroyed >9,000 structures and >40 km2 of forest in the northeastern region of the Los Angeles metropolitan area, California. Building damage was primarily assessed through ground investigations, a process that took several weeks due to hazardous conditions and the difficulty of accessing burnt areas. This
Solene L. Antoine
wiley   +1 more source

Assessment of Trace Element Daily Intake Based on Consumption Rate of Foodstuffs in Bandung City

open access: yesAtom Indonesia, 2012
Trace elements are required by human body and have a variety role in biochemical functions mostly as catalyst for enzymatic activity in human body. Some trace elements are essential since they are inadequately or not synthesized by human body.
E. Damastuti   +3 more
doaj  

Advancing Water Security and National Preparedness Through Earth Science Observations and the Earth Science Workforce

open access: yesEarth and Space Science, Volume 13, Issue 4, April 2026.
Abstract U.S. civil spaceborne assets represent the forefront of engineering innovation across remote sensing domains such as gravimetry, thermal radiometry, imaging spectroscopy, light detection and ranging (LiDAR), and synthetic aperture radar (SAR).
Christine M. Lee   +14 more
wiley   +1 more source

The Prediction of Short‐Term Atmospheric Density in Lower Thermosphere

open access: yesSpace Weather, Volume 24, Issue 4, April 2026.
Abstract Accurate short‐term prediction of atmospheric density in the lower thermosphere (85–125 km) is essential for precise orbit determination and satellite drag mitigation, particularly during geomagnetic storms. Although physics‐based models such as NRLMSIS 2.1 provide empirical estimates, their effectiveness is limited under extreme space weather.
Zheng Li   +4 more
wiley   +1 more source

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