Results 31 to 40 of about 439 (181)
Journal 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
Over-the-horizon aircraft detection using skywave AM-radio broadcast signals
, 2015 We present the preliminary experimental results of a collaborative research project to determine the feasibility of using AM-radio broadcasts of opportunity for aircraft detection at ranges of thousands of kilometers from a terrestrial receiver.
Ng, B. +4 more
core +1 more source
JAWRA Journal of the American Water Resources Association, Volume 62, Issue 1, February 2026.ABSTRACT Arizona, located in the Desert Southwest of the U.S., faces chronic water scarcity and has been strongly affected by the multidecadal Millennium Drought. As the state increasingly turns to water augmentation strategies, accurate, high‐resolution estimates of water balance components are essenctial.
Abdul Moiz, Giuseppe Mascaro
wiley +1 more source
The First Results of Ionospheric Skywave Propagation Experiment Over Taiwan
Radio Science, Volume 61, Issue 1, January 2026.Abstract An ionospheric over‐the‐horizon propagation experiment was carried out in Taiwan to investigate characteristics of ionospheric F layer skywave propagation at frequencies 4–12 MHz. Experimental results show that there are prominent diurnal variations in the incident angle, virtual height and plasma frequency at reflection height, which are ...
Hung‐Shi Lin +3 more
wiley +1 more source
Generation and Assimilation of Propagation Advice for HF Skywave Radar Systems
, 2008 HF skywave (OTH) radars operate in a very challenging environment so the objective of optimizing the radar resources to address the surveillance missions can be achieved only with the aid of a variety of support systems and models.
ANDERSON S +2 more
core +2 more sources
Detection of a signal in linear subspace with bounded mismatch [PDF]
, 2006 We consider the problem of detecting a signal of interest in a background of noise with unknown covariance matrix, taking into account a possible mismatch between the actual steering vector and the presumed one.
Besson, Olivier
core +1 more source
A Frequency Selection Method For Hf-Oth Skywave Radar Systems
, 2006 Publication in the conference proceedings of EUSIPCO, Florence, Italy ...
Capria A +3 more
openaire +4 more sources
Decoding Brain Tumors: Comprehensive Insights into Detection and Evaluation Approaches
Engineering Reports, Volume 7, Issue 12, December 2025.Comparison of brain tumor analysis techniques reveals that hybrid and ensemble models offer superior accuracy and generalization, while traditional ML provides higher interpretability and lower computational cost. This radar chart highlights the trade‐offs across five critical performance dimensions.
Anusha Nalajala +4 more
wiley +1 more source
GLRT-Based Direction Detectors in Homogeneous Noise and Subspace Interference [PDF]
, 2007 In this paper, we derive and assess decision schemes to discriminate, resorting to an array of sensors, between the H0 hypothesis that data under test contain disturbance only (i.e., noise plus interference) and the H1 hypothesis that they also contain ...
Ricci, Giuseppe +12 more
core +1 more source
Journal of Advances in Modeling Earth Systems, Volume 17, Issue 10, October 2025.Abstract Satellite‐based quantitative precipitation estimates (QPE), such as NASA's Integrated Multi‐satellitE Retrievals for GPM (IMERG), provide easily accessible continental‐to‐global precipitation forcings for flood prediction and other hydrologic applications.
Kaidi Peng +8 more
wiley +1 more source