Results 71 to 80 of about 4,480 (213)

Forward scatter radar for air surveillance: Characterizing the target-receiver transition from far-field to near-field regions [PDF]

, 2017
A generalized electromagnetic model is presented in order to predict the response of forward scatter radar (FSR) systems for air-target surveillance applications in both far-field and near-field conditions.
Comite, Davide, Falconi, Marta Tecla, Galli, Alessandro, Lombardo, Pierfrancesco, Marzano, FRANK SILVIO, Pastina, Debora   +5 more
core   +2 more sources

A New Age of SAR: How Can Commercial Smallsat Constellations Contribute to NASA's Surface Deformation and Change Mission?

Earth and Space Science, Volume 12, Issue 1, January 2025.
Abstract In response to the 2017 Decadal Survey, NASA conducted a five‐year study on the Surface Deformation and Change (SDC) designated observable to study potential mission concepts. As part of the SDC mission study, the Commercial Synthetic Aperture Radar (ComSAR) subgroup was tasked with evaluating the current landscape of the SAR and ...
Stacey A. Huang, Batuhan Osmanoğlu, Bernd Scheuchl, Shadi Oveisgharan, Jeanne M. Sauber, MinJeong Jo, Ala Khazendar, Ekaterina Tymofyeyeva, Betsy Wusk, Arif Albayrak   +9 more
wiley   +1 more source

Joint Weak Signal Detection and Carrier Frequency Offset Estimation for Communication in Multistatic Collaborative Passive Radar

IET Communications, Volume 19, Issue 1, January/December 2025.
A virtual array‐based method is proposed to jointly detect communication signals and estimate the starting position and cCFO. It constructs virtual arrays based on the linear phase characteristics of the training sequence regardless of the specific signal structure, which allows it a wide range of applications.
Xiaomao Cao, Hong Ma, Hua Zhang, Jiang Jin   +3 more
wiley   +1 more source

Two-Dimensional Forward Scattering – Comparisons of Approximate and Exact Solutions [PDF]

, 2012
Various methods for analyses of scattering are mentioned and new approximate relationships are derived. Experimental results for thin wire and several numerical simulations of forward scattering using approximate estimations, physical optics and exact ...
Fiser, O., Pidanic, J., Schejbal, V., Svoboda, P.   +3 more
core   +1 more source

Improving Security Screening : A comparison of multistatic radar configurations for human body imaging. [PDF]

, 2016
Estudio de configuraciones multiestáticas para mejorar los checkpoints para detección de armas y explosivos basados en sistemas ...
González Valdés, Borja, Las Heras Andrés, Fernando Luis, Mantzavinos, Spiros, Martínez Lorenzo, José Ángel, Rappaport, Carey M., Álvarez López, Yuri   +5 more
core   +1 more source

First Measurements with NeXtRAD, a Polarimetric X/L Band Radar Network [PDF]

, 2017
NeXtRAD is a fully polarimetric, X/L Band radar network. It is a development of the older NetRAD system and builds on the experience gained with extensive deployments of NetRAD for sea clutter and target measurements.
Alhuwaimel, S., Cheng, P., Coetzee, S., Du Plessis, D., Fioranelli, F., Griffiths, H., Inggs, M.R., Jordan, D., Miceli, W., O'Hagan, D., Paine, S., Palama', R., Ritchie, M., Sandenbergh, J.S., Stevens, A.   +14 more
core   +2 more sources

An ISAR target motion estimation algorithm based on a differential semblance criterion

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study presents a novel approach for improving rotational motion estimation in multistatic Inverse Synthetic Aperture Radar (ISAR) imaging through a Differential Semblance Optimization (DSO) criterion. By reducing discrepancies across images from multiple transmitter–receiver pairs, our method enables precise yaw rotation estimation and produces ...
D. P. Huxley, F. M. Watson, W. R. B. Lionheart   +2 more
wiley   +1 more source

Multistatic SAR Imaging: Comparison of Simulation Results and Experimental Data [PDF]

, 2017
Synthetic aperture radar (SAR) systems in a multistatic configuration are a promising candidate for future Earth observation and reconnaissance radar systems. They overcome the sampling constraints inherent to single-channel SAR systems.
Bachmann, Markus, Heiderich, Lennart, Kraus, Thomas, Krieger, Gerhard, Moreira, Alberto   +4 more
core   +1 more source

Multistatic Synthetic Aperture Radar Autofocus for Back Projection Imaging of a Moving Target

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This paper presents a new metric‐based autofocus approach, called Localised Threshold Sharpness (LTS), which employs Multistatic SAR data to localise and focus a target moving with up to six degrees of freedom motion on a real‐time, pulse‐by‐pulse basis.
Anmol Rattan, Daniel Andre, Mark Finnis
wiley   +1 more source

Sparse Array Configuration Optimization Based on Target Priors in Distributed ISAR Imaging

Electronics Letters, Volume 61, Issue 1, January/December 2025.
In this letter, we consider the sparse array configuration optimization problem for distributed inverse synthetic aperture radar (ISAR) imaging of long‐range targets, aiming to suppress the strong grating lobes caused by sparse sampling. Particularly, we propose a distributed ISAR configuration optimization method, which constructs an equivalent ...
Siyu Zhao, Guangbin Zhang, Yan Wang
wiley   +1 more source