Results 51 to 60 of about 65,009 (233)

Internal physiological drivers of leaf development in trees: Understanding the relationship between non‐structural carbohydrates and leaf phenology

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo   +8 more
wiley   +1 more source

A Compact, Reconfigurable, Multi-UWB Radar for Snow Thickness Evaluation and Altimetry: Development and Field Trials

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
We developed a portable ultra-wideband radar system capable of reconfigurable operation in multiple frequency bands (separate or simultaneous) spanning from microwaves through millimeter waves.
Fernando Rodriguez-Morales   +9 more
doaj   +1 more source

Facilitating macrosystem biology with organismal‐scale airborne remote sensing: Challenges and opportunities

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Emergent ecosystem properties, such as population and trait distributions, biodiversity and energy and water fluxes, occur because of the dynamic interactions of individuals in their environment.
Sarah J. Graves   +8 more
wiley   +1 more source

Design and Experimental Analyses of an Accuracy Verification System for Airborne Target Tracking via Radar Guidance Systems

open access: yesApplied Sciences, 2022
A radar guidance system is a core component of a radar-guided air-to-air missile, and its tracking accuracy of airborne targets determines the operational effectiveness of said missile. To verify the tracking accuracy of the radar guidance system against
Yingchao Han   +2 more
doaj   +1 more source

Confirming the impact origin of the São Miguel do Tapuio structure, northeastern Brazil

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The São Miguel do Tapuio structure (SMT) is a remarkable, nearcircular feature of about 21 km diameter, centered at 5°37.6′ S, 41°23.3′ W in Piauí state, northeastern Brazil. The structure is located within the sedimentary strata of the Paleozoic–Mesozoic Parnaíba Basin and predominantly comprises sandstones of the Devonian Pimenteiras and ...
Alvaro Penteado Crósta   +9 more
wiley   +1 more source

New airborne Doppler radar

open access: yesEos, Transactions American Geophysical Union, 1990
U.S. and French research establishments will build and share an airborne Doppler radar that they will design to gather data on large‐scale storm structures and global atmospheric processes.The University Corporation for Atmospheric Research (UCAR), Boulder, Colo., the Centre National d'Etudes des Telecommunications (CNET) and the Institut National des ...
openaire   +1 more source

The evolutionary trend in airborne and satellite radar altimeters [PDF]

open access: yes, 1984
The manner in which airborne and satellite radar altimeters developed and where the trend is leading was investigated. The airborne altimeters have progressed from a broad beamed, narrow pulsed, nadir looking instrument, to a pulse compressed system that
Fedor, L. S., Walsh, E. J.
core   +1 more source

Eruption Source Parameters in Volcanic Plume Modeling: Advances, Challenges, and Future Directions

open access: yesReviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Accurately predicting the atmospheric dispersion of volcanic ash and gases is crucial for both scientific understanding and hazard mitigation. Estimating Eruption Source Parameters (ESP), such as mass eruption rate, plume height, duration, and particle size distribution and properties, remains challenging due to the complex nature of volcanic ...
A. Costa   +4 more
wiley   +1 more source

Polarization Characteristics Simulation of Airborne Weather Radar Rainfall Target Based on Numerical Weather Prediction

open access: yesLeida xuebao, 2016
Meteorological target simulation using polarization information is the foundation of the theoretical research and design application of dual-polarization Doppler weather radar.
Liu Xia   +4 more
doaj   +1 more source

Clutter rejection for MTI radar using a single antenna and a long integration time [PDF]

open access: yes, 2011
Moving Target Indicators (MTI) are airborne radar systems designed to detect and track moving vehicles or aircrafts. In this paper, we address the problem of detecting hazardous collision targets to avoid them.
Goy, Philippe   +2 more
core   +2 more sources

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