Abstract. The increasing need of renewable energy fosters the expansion wind turbine sites for power production throughout Europe with manifold effects, both on positive and negative side. latter concerns, among others, radar observations in proximity (WT) sites. With aim better understanding effects large, moving scatterers like turbines returns, MeteoSwiss performed two dedicated measurement ...

Purpose This paper aims to discuss the classification of targets based on their radar cross-section (RCS). The wavelength, dimensions and distance from antenna are in order 1 mm, m 10 m, respectively. Design/methodology/approach near-field RCS is considered, physical optics approximation used for its numerical calculation. To model real scenarios, authors assume that incident angle a random var...

Inverse Synthetic Aperture Radar (ISAR) target images are extracted using compressed sensing methods. The extracted images are edited and merged into measured Synthetic Aperture Radar (SAR) images. A noise free image of the target is extracted from the Radar Cross Section (RCS) measurement by using the Basis Pursuit Denoise (BPDN) method and then solving for a model consisting of point scattere...

Uncertainties in certain features of target geometries result in a loss of confidence in the signature assessment of the target. Knowledge of the impact to a target’s radar cross section (RCS) due to changes to specific target features can assist to identify whether uncertainty in a certain target feature warrants a loss of confidence in the target signature. This study will allow a development...

Abstract A measurement method and system based on conventional radars has been proposed to address the problem of radar cross-section (RCS) ship targets in open seas. Calibration errors for RCS ground plane range (GPR) are analysed, error elimination accurate calculation formula given. An is designed by improving radars. These systems measure two Luneburg lens reflectors different sizes lake. T...

To study the radar cross-section (RCS) of a flapping-wing aircraft, method dynamic scattering is presented. The aircraft has two rigid wings and fuselage similar to bird’s body, where plane shape wing U-type. model established pitching flapping actions are simulated. electromagnetic characteristics under flight modes, different wave frequencies observation angles investigated. results show that...

We study the radar cross section (RCS) property of an aircraft considering electromagnetic (EM) characteristics a frequency selective surface (FSS) radome, mounted on aircraft. Instead full-wave methods, we utilize high-frequency such as shooting and bouncing rays (SBR), physical theory diffraction (PTD), flat model, taking significant computational efficiency. Based developed algorithm, analyz...

The superposition of resonances in a subwavelength particle can be used to achieve powerful scattering beyond the single channel limit and also determine directionality scattered radiation. It has been proposed that by overlapping modes only with equivalent polarity far-field, “superbackscattering” condition, where total backscattered power is maximized, achieved. This effect observed through s...

Abstract. Efficient and safe integration of Unmanned Aerial Systems, both civil military ones, must be guaranteed in the airspace, which is expected to threated by problems collisions, loss communications congestion air traffic environment. One main issues how improve identification unmanned aircrafts low altitude airspace. The process, that includes detection, verification, recognition phases,...

In this study, the radar cross-section (RCS) of a large structure is analyzed using linear bounding volume hierarchy (LBVH), which representative acceleration algorithm ray-tracing technique. A technique, high-frequency method, used to analyze electromagnetic properties structures, and (BVH), binary tree structure, applied reduce intersection search time. The improvement in calculation speed qu...