Results 71 to 80 of about 5,154 (228)

Target Coordinates Estimation by Passive Radar with a Single non-Cooperative Transmitter and a Single Receiver [PDF]

open access: yesJournal of Communications Software and Systems, 2020
Passive radar is a bistatic radar that detects and tracks targets by processing reflections from non-cooperative transmitters. Due to the bistatic geometry for this radar, a target can be localized in Cartesian coordinates by using one of the following ...
Ali Kazem   +2 more
doaj  

Monitoring Flood Inundation Dynamics From Space

open access: yesReviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract With the increasing intensity and frequency of flood events worldwide, the need for accurate and timely inundation mapping has never been more critical. Large‐scale flood extent estimations are vital for coordinating effective disaster response, facilitating recovery, and building future resilience.
C. Campo   +5 more
wiley   +1 more source

Frequency Selective Rasorber With Low Insertion Loss and Ultra‐Broadband Scattering Reduction

open access: yesAdvanced Physics Research, Volume 5, Issue 2, February 2026.
We present a dual‐polarization broadband frequency selective rasorber featuring a transmission window in the middle of its absorption band. The proposed FSR achieves a –10 dB reflection band over 3.68–16.94 GHz with a fractional bandwidth of 128.6%, featuring a minimum insertion loss of 0.3 dB at 10.3 GHz.
Ziming Yu   +4 more
wiley   +1 more source

Performance Prediction and Verification for the Synchronization Link of TanDEM-X

open access: yes, 2007
Bistatic Synthetic Aperture Radar (SAR) systems have a high potential for scientific, commercial and security applications. One of the benefits is the possibility to generate digital elevation models using bistatic interferometry.
Robert Metzig   +9 more
core   +1 more source

Ocean Surface Cross Section for Bistatic HF Radar Incorporating a Six DOF Oscillation Motion Model

open access: yesRemote Sensing, 2019
To investigate the characteristics of sea clutter, based on ocean surface electromagnetic scattering theory, the first- and second-order ocean surface scattering cross sections for bistatic high-frequency (HF) radar incorporating a multi-frequency six ...
Guowei Yao, Junhao Xie, Weimin Huang
doaj   +1 more source

Impacts of Atmospheric Rivers in Central Greenland: Snowfall, Clouds, and Atmospheric State

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract Atmospheric rivers (ARs) are long bands of strong horizontal water vapor transport responsible for over 90% of total integrated vapor transport (IVT) in extratropical and polar regions. Using a 12‐year record (2010–2022) of ground‐based remote sensing, radiosonde, snow stake, and reanalysis data from Summit Station, Greenland, we quantify the ...
A. E. Wedum   +5 more
wiley   +1 more source

A Modified Hierarchical Vision Transformer for Soil Moisture Retrieval From CYGNSS Data

open access: yesWater Resources Research, Volume 62, Issue 1, January 2026.
Abstract This research introduces a new deep learning (DL) framework, multi‐head self‐attention‐aided vision Transformer (MSA‐ViT), for soil moisture (SM) retrieval using Cyclone Global Navigation Satellite System (CYGNSS) data. We first assess the sensitivity of CYGNSS reflectivity (Γ) $({\Gamma })$ to SM, demonstrating a strong physical linkage ...
Qingyun Yan   +4 more
wiley   +1 more source

Advanced Bistatic and Multistatic SAR Concepts and Applications

open access: yes, 2006
Tutorial on Bistatic and Multistatic Synthetic Aperture Radar from EUSAR 2006 ...
Krieger, Gerhard
core  

GPS disciplined RFSoC synchronization, timing, and performance characterization in bistatic radar systems [PDF]

open access: yes, 2023
Distributed radar geometries offer multiple advantages over monostatic pulse-Doppler radar, but synchronizing frequency and timing for transmitting and receiving nodes in a distributed system is required to more accurately detect range and Doppler ...
Ortiz-Cheek, Michael
core  

The First Results of Ionospheric Skywave Propagation Experiment Over Taiwan

open access: yesRadio 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

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