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Monday, August 10, 2020 | History

2 edition of Colloquium on the Sea Surface - Targetor Clutter? found in the catalog.

Colloquium on the Sea Surface - Targetor Clutter?

Colloquium on the Sea Surface - Target or Clutter? (1979 Institution of Electrical Engineers)

Colloquium on the Sea Surface - Targetor Clutter?

[proceedings]

by Colloquium on the Sea Surface - Target or Clutter? (1979 Institution of Electrical Engineers)

  • 161 Want to read
  • 18 Currently reading

Published by [I.E.E.] in [London] .
Written in English


Edition Notes

Statementorganised by Professional Group E15 (Radar, Sonar & Navigation Systems).
SeriesDigest no; 1979/9
ContributionsInstitution of Electrical Engineers.
ID Numbers
Open LibraryOL19739891M

Sea clutter The nature of the sea clutter form the sea surface depends upon the shape of the sea surface. And there are so many factors that can influence the sea clutter. But while the parameters relating to the radar system and its configuration, such as frequency, cell size, polarization, grazing angle at the surface, and ocean environmental Author: Zhang Zhi-gang, Zhang Jian-xue, Zhang Yong-gang. The Analysis of Sea Clutter Statistics Characteristics Based On the Observed Sea Clutter of Ku-Band Radar Zhuo Chen1, Xianzu Liu, Zhensen Wu1, and Xiaobing Wang1,2 1School of Science, Xidian University, Xi’an, Shaanxi, China 2National Key Laboratory of Electromagnetic Environment Research, Shanghai, China Abstract-The model of GTI,TSC,NRL distribution theCited by: 3.

Some Relationships between the Sea Surface Winds and the Sea Clutter on the Weather Radar Images. Ichiro Isozaki 1), Takehiro Kakehashi 2) 1) Meteorological Research Institute 2) Marine Department, Japan Meteorological Agency Released /03/09 received /10/ - Spring Theme. See more ideas about Under the sea party, Under the sea and Little mermaid parties pins.

Due to the instinct complexity and the large scale non-stationary of so-called sea-clutter, radar backscatters from ocean surface, it is always challenging to detect the weak marine target. In classical statistical approaches, the seaclutter is modeled as several kinds of stochastic processes, which are found inadequate, especially in high sea Cited by: 1. Outdoor Use Hi! We are using a bunch of Surface Pro 3s in our business (a construction company) and the major complaint that I am hearing from my users is that the device is almost unusable outdoors in any sort of sunlight since the screen can't be seen at all.


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Colloquium on the Sea Surface - Targetor Clutter? by Colloquium on the Sea Surface - Target or Clutter? (1979 Institution of Electrical Engineers) Download PDF EPUB FB2

CurryR˙book Radar Clutter 81 • Sea state. σ0 increases with sea state. • Polarization. For smooth terrain and sea surface and low grazing angles, σ0 is greater for vertical polarization than for horizontal polarization. For rough terrain and at high grazing angles, theFile Size: KB.

This book provides an authoritative account of the current understanding of radar sea clutter, describing its phenomenology, EM scattering and statistical modelling and simulation, and their use in the design of detection systems and the calculation and practical evaluation of radar book pays particular attention to the compound K distribution model developed by the authors.

Topics covered include the characteristics of radar sea clutter, modeling radar scattering by the ocean surface, statistical models of sea clutter, the simulation of clutter and other random.

The sea-surface microlayer has often been defined as the top 1 to micrometers of the ocean surface. A considerable amount of new research over the past ten years has led to increased understanding of this vitally important interface between the ocean and the atmosphere, and how it may interact with global change : Hardcover.

Surface Clutter Surface clutter includes both land and sea clutter, and is often called area clutter. Area clutter manifests itself in airborne radars in the look-down mode. It is also a major concern for ground-base d radars when searching for targets at low grazing angles.

The grazing angle is the angle from the surface of theFile Size: KB. Sea state is the qualitativ e and qua ntitative r oughness of the s ea surface. Specifi call y, sea stat e is quantified b y a t e rm know n a s s ignifi cant w ave h eight, or t he a verage he i.

Detecting low observable targets within sea clutter at low grazing angle is one of the research hotspots in radar signal processing community. In this paper, we have proposed a novel method based on polarimetric decomposition theorem.

The polar characteristics of sea clutter has been analyzed, with the parameters after the decomposition of target scattering by: 3. The basic types of clutter can be summarized as follows: Surface Clutter Sea Clutter Surface Clutter Ground or sea returns are typical surface clutter.

Returns from geographical land masses are generally stationary, however, the effect of wind on trees etc means that the target can introduce a. THE MODELLING OF RADAR SEA CLUTTER 1. Papers presented in the thesis The papers listed below are the subjects of this thesis.

They are referenced by number in the supporting text and the full papers are appended to the thesis, labelled Paper 1, Paper 2 etc. [1] K D Ward, C J Baker and S Watts, “Maritime Surveillance radar part 1: Radar.

Advanced Sea Clutter Models and their Usefulness for Target Detection The pdf given by equation (1) is known as the K-compound probability law, somewhat accepted as one of the best candidates in describing sea clutter behavior (along with the Weibull probability law).

Its scale parameter is linkedCited by: 7. Electromagnetic Scattering and Statistic Analysis of Clutter from Oil Contaminated Sea Surface Cong-hui QI, Zhi-qin ZHAO School of Electronic Engineering, University of Electronic Science and Technology of China, Xiyuan AveChengdu, Sichuan, China [email protected], [email protected] Abstract.

Refractivity estimation from sea clutter: An invited review Ali Karimian,1 Caglar Yardim,1 Peter Gerstoft,1 William S. Hodgkiss,1 and Amalia E. Barrios2 Received 1 July ; revised 11 October ; accepted 12 October ; published 24 December [1] Non‐standard radio wave propagation in the atmosphere is caused by anomalousFile Size: 1MB.

The sea-surface microlayer has often been operationally defined as roughly the top micrometres of the ocean surface. Considerable new research over the past 10 years has led to increased understanding of this vitally important interface between the ocean and the atmosphere, and how it may interact with global change processes.

LIAO et al.: USING SAR IMAGES TO DETECT SHIPS FROM SEA CLUTTER Fig. Slant-range ERS-1 image shows Hong Kong, and surrounding seas. The study area was outlined by a rectangle box. Gaussian distribution. µis the location β =0 and µ =0, the distribution is a symmetric alpha-stable (SαS) distribution.

The results show that a direct link can be made, thus allowing a causal relationship to be established between specific features on the sea surface and remotely gathered radar sea clutter.

Chaotic dynamics of sea clutter boasts important applications in a number of fields, including weather radar systems, which are intensely studied at major universities. This book presents a detailed account of chaotic dynamics of sea clutter, using real-life sea clutter data rather than simulated data, and drawing on eight years of research by Pages: The Book of the Sea: Being a Collection of Writings About the Sea in All Its Aspects [A.

Spectorsky] on *FREE* shipping on qualifying offers. The Book of the Sea: Being a Collection of Writings About the Sea in All Its Aspects5/5(2). 7 7/ Normalized RCS σ0 R Radar pulse Elevation R Azimuth h ψ Clutter patch antenna footprint φgr ρ θel θaz R θaz ρsec φgr The normalized clutter reflectivity, σ0, is defined as the total RCS, σ, of the scatterers in the illuminated patch, normalized by the area, A c, of the patch and it is measured in units of dBm 2/m 2.

local grazing angle. Abstract—Sea-return signals from X-band radar contain back-scattering signals from the sea surface called sea clutter, due to the interaction between electromagnetic waves and the sea surface. In this paper, we will present a simulator that calculates the sea clutter spectrum from a coastal radar.

This implies that sea clutter characteristics. The amplitude of sea clutter reflections has been re-ported to increase in proportion to the height of the waves [9], but there have been no reports discussing how the statistical characteristics of sea-clutter reflection am-plitudes are affected by statistical changes in the state of the sea surface.

Sea-surface state is characterized by val. The Secret of the Emerald Sea was a very difficult book to embrace. For me, I felt as though the story was unrelatable and lacked depth.

I was under the opinion that the book was trying to force the reader to sense the emotions, rather than having the emotions develop naturally. I felt no real attachment or innocence/morality in any character/5.Chapter Sea Clutter. an understanding of sea clutter will depend not only on finding suitable models to describe the surface scattering but on knowledge of the complex behavior of the sea as well.

Fortunately, a close relationship between radar and oceanography has grown up in the remote-sensing community, leading to the accumulation of.Simulation of Sea Clutter Characters in the Different Duct Environment Zhao Ya- ming1+ and Zhang Yong-gang2 1Naval Aeronautical and Astronautical University, Yantai, China 2Dalian Naval Academy Dalian, China Abstract—The influence of sea clutter can not be ignored in the radar trapped structure of duct environment can induce exceptional characters of the graze angle and clutter Author: Zhao Ya, Zhang Yong-gang.