Download or read book Radar Ground Clutter Measurement and Models Part 2 Spectral Characteristics and Temporal Statistics written by Hing C. Chan and published by . This book was released on 1991 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of ground-based surveillance radars is affected by the spectral characteristics and the temporal statistics of ground clutter. Traditionally, ground clutter problems are treated by employing filtering techniques such as delay-line cancellers. These techniques result in a degraded detection performance of low-velocity targets. With the worsening congestion in air traffic, there is an increased demand for improved performance of low-velocity target detection. To improve the detection performance of ground-based surveillance radars for low-velocity targets, signal processing algorithms which exploit ground-clutter characteristics must be developed. This requires a thorough understanding of ground-clutter behaviour. In this paper, we report the results of the spectral and statistical analyses of low-angle ground clutter, using data of the MIT Lincoln Laboratory Phase I program and S-band coherent ground-clutter data collected by the Radar Division of the Defence research Establishment Ottawa. The results of the spectral analysis show that ground clutter, as observed by a coherent radar with a stationary antenna, comprises three components: (a) a coherent component, (b) a slow-diffuse component and (c) a fast-diffuse component. These components can be described by relatively simple models. The model parameters are functions of radar frequency, waveform resolution, land cover and wind speed.
Download or read book Low angle Radar Land Clutter written by J. Barrie Billingsley and published by IET. This book was released on 2002 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this unique book, Billingsley solves the problem of radar land clutter by showing the reader how to design and predict the performance of radars that operate in situations where echoes from the earth's surface interfere with radar target echoes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Ground Clutter Measurements and Models Part 1 Spatial Amplitude Statistics written by J. B. Billingsley and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: At MIT Lincoln Laboratory, we have collected a large multifrequency data base of radar ground clutter measurements from many sites. We employ our clutter data to develop clutter models. Of particular interest to us is the site-specific prediction of PPI ground clutter maps for ground-sited radars, that is, in simulating the spatial variation of ground clutter. This paper describes our measurements, and presents a statistical clutter model for spatial amplitude statistics based on depression angle, terrain type, RF frequency, and radar resolution.
Download or read book Principles of Radar and Sonar Signal Processing written by François Le Chevalier and published by Artech House. This book was released on 2002 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Radar and Sonar Signal Processing offers you a thorough presentation of the latest technologies in conventional and adaptive signal processing theory, and covers techniques for detailed analysis of physical signatures of targets and clutter. You learn how target signature analysis provides you with a better understanding of the various techniques used in anechoic chambers and modern radar systems. Examples of signatures give you a greater insight into classification problems. A discussion on low frequency systems, wideband radars, and STAP provides you with a better awareness of physical limits and future developments.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992-07 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Characteristics of Low angle Radar Ground Clutter written by and published by . This book was released on 1989 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of ground-based radars is affected by the spectral characteristics of ground clutter. Most signal processing algorithms designed to enhance detection performance are Doppler-frequency-sensitive, such as the moving target indicator filter, Doppler processor and coherent clutter map. This report gives the results of a comprehensive spectral analysis of low-angle ground clutter, using the MIT Lincoln Laboratory Phase I data and the DREO S-band clutter data. The report presents the spectral analysis of ground clutter for different bands of radar frequency; describes the data used in the spectral analysis, including both the conventional Fourier analysis and a super-resolution spectral analysis technique; gives a brief background on the maximum entropy spectral estimate; and describes the particular procedure designed to bring out the spectral characteristics of ground clutter from short time series.
Download or read book AGARD Index of Publications written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1989 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Characteristics of Radar Target Returns in Clutter written by Herman V. Cottony and published by . This book was released on 1970 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of further investigation into the possibility of resolving radar targets in clutter, using spectral approach, are described. Characteristics of back-scatter returns by ground-clutter scatterers consisting of seven non-resonant scatterers are examined in the frequency domain. It is seen that, when the scatterers are of equal magnitude and are equally spaced in range, the returns, in the frequency domain, are characterized by lobes of relatively high amplitude separated by gaps in frequency spectrum where the amplitude is relatively low. A mathematical analogy to the radiation pattern of an array antenna is pointed out. Three quasi-random ground-clutter models were designed, using tables of random digits. The returns from these models, measured in the frequency domain, were recorded and compared with the computed results. Taking into account the differences between the assumed conditions and the conditions found at the range, the agreement is found satisfactory. Three cases of backscatter radar models consisting of one or two non-resonant target scatterers in quasi-random clutter models were investigated. As a result, it appears that the search for hidden target scatter may be simplified if a searching pulse, with time delay varying linearly with time, is injected into the system. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exponential Decay in Windblown Radar Ground Clutter Doppler Spectra written by J. Barrie Billingsley and published by . This book was released on 1996 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Conference on Radio Meteorology Incorporating the Eleventh Weather Radar Conference written by and published by . This book was released on 1993 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preprints Radar Meteorology Conference written by and published by . This book was released on 1993 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Conference on Radar Meteorology written by and published by . This book was released on 1993 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low angle X band Radar Ground Clutter Spatial Amplitude Statistics written by J. Barrie Billingsley and published by . This book was released on 2002 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
