نتایج جستجو برای: radar cross section

تعداد نتایج: 646280  

1997
S. V. Nghiem F’. K. Li G. Neumann

A bstnzct An airborne Ku-band scatterometer (NUSCAT) was used to measure ocean backscatters during the Surface Wave Dynamics Experiment (S WADE). The objective is to improve understanding of the relationship between ocean radar backscatter and near surface winds. BackScatter measurements are presented for Gulf-Stream boundary, low wind, and large wave effects. Over the boundary crossings, large...

حجت کاشانی, فرخ , راشد محصل, جلیل , صادقی کیا, فاطمه ,

This theoretical study examines the characteristics of a surface wave driven plasma monopole antenna using finite difference time domain method (FDTD) as well as commercial full wave simulator. The results show that the full wave simulator can be considered as an acceptable tool in simulation of a plasma antenna. Input impedance, radiation pattern, gain, efficiency and radar cross section of pl...

The proposed theorem in this paper is indicative of a kind of duality in the propagation of waves in the dual media of and in the spherical structures. Independent of wave frequency, the number of layers, their thickness, and the type of polarization, this theorem holds true in case of any change in any of these conditions. Theorem: Consider a plane wave incident on a multilayered spheric...

2009
H. Chen M. Zhang D. Nie H.-C. Yin

A robust semi-deterministic facet model for the computation of the radar scattering cross section from the ocean-like surface is presented. As a facet-based theory, it is a more comprehensive model which can reflect the specular and diffuse configurations, as well as the monoand bistatic features. Significant computational efficiency and good agreement with experimental data are observed, which...

1998
Antoni Broquetas Josep Palau Luis Jofre Angel Cardama

The paper presents a new inverse synthetic aperture radar (ISAR) algorithm intended for radar cross-section (RCS) imaging and measurement from scattered fields. The method, based on a spherical-wave near-field illumination of the target, overcomes the requirement for an expensive compact range facility to produce a plane wave illumination. The formulation and the implementation of the algorithm...

2011
Paul Tsuji Dongbin Xiu Lexing Ying

This paper is concerned with the uncertainty quantification of high-frequency acoustic scattering from objects with random shape in two-dimensional space. Several new methods are introduced to efficiently estimate the mean and variance of the random radar cross section in all directions. In the physical domain, the scattering problem is solved using the boundary integral formulation and Nyström...

2005
Pavel V. Nikitin K. V. S. Rao

This paper presents a method for measuring signal backscattering from an RFID tag and calculating tag radar cross-section (RCS), which depends on the chip input impedance. We present a derivation of a theoretical formula for RFID tag radar cross-section and an experimental RCS measurement method using a network analyzer connected to an antenna in an anechoic chamber where the tag is also locate...

2009
Ninoslav Majurec Joel T. Johnson Simone Tanelli

The primary science instrument of the CloudSat Mission is the Cloud Profiling Radar (CPR). The CPR is a W-band (94 GHz) nadir looking radar (e.g. Tanelli, 2008) with the purpose of measuring backscattered power from hydrometeors (clouds and precipitation). Although the CPR contains an internal calibration system, external calibration using geophysical sources with known normalized radar cross-s...

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