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Book A Polarization Diversity Radar Data Processor

Download or read book A Polarization Diversity Radar Data Processor written by James I. Metcalf and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A real time data processor has been designed for use with the AFGL 10-cm Doppler weather radar which is to be operated with alternating transmission of horizontally and vertically polarized signals. In this mode of operation the reception of backscattered signals of polarizations identical to those of the transmitted signals allows the computation of the differential reflectivity between the two polarizations in addition to the absolute reflectivity and the Doppler mean velocity and variance. The switching of transmitted polarization introduces difficulties in the estimation of the autocovariance of the received signals, from which the Doppler velocity parameters are derived. The processor design and the allowed modes of radar operation circumvent these difficulties. This report describes the processing algorithms theoretically and presents details of the implementation of these algorithms in hardware. (Author)

Book A Polarization Diversity Radar Data Processor

Download or read book A Polarization Diversity Radar Data Processor written by James I. Metcalf and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A real time data processor has been designed for use with the AFGL 10-cm Doppler weather radar which is to be operated with alternating transmission of horizontally and vertically polarized signals. In this mode of operation the reception of backscattered signals of polarizations identical to those of the transmitted signals allows the computation of the differential reflectivity between the two polarizations in addition to the absolute reflectivity and the Doppler mean velocity and variance. The switching of transmitted polarization introduces difficulties in the estimation of the autocovariance of the received signals, from which the Doppler velocity parameters are derived. The processor design and the allowed modes of radar operation circumvent these difficulties. This report describes the processing algorithms theoretically and presents details of the implementation of these algorithms in hardware. (Author).

Book A Polarization Diversity Meteorological Radar System

Download or read book A Polarization Diversity Meteorological Radar System written by James I. Metcalf and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AFGL 10-cm Doppler weather radar was modified to enable the measurement of the differential reflectivity between horizontal and vertical polarizations in addition to the absolute reflectivity and the Doppler mean velocity and spectrum variance. Polarization switching is achieved by means of a diplexer, which separates at the antenna the transmitted signals of two frequencies, 2710 and 2760 MHz, and permits nearly simultaneous transmission of signals of orthogonal polarizations. Signals of these frequencies can be transmitted either with horizontal and vertical polarization, respectively, or with left and right circular, polarization, respectively. We describe the design and performance of the diplexer and the performance of the real-time data processor, present examples of meteorological measurements, and discuss future developments of the radar system. Keywords: Polarization diversity weather radar, Dual polarization radar, and Polarization switching.

Book Precipitation and Lightning Measurements by Polarization Diversity Radar

Download or read book Precipitation and Lightning Measurements by Polarization Diversity Radar written by James I. Metcalf and published by . This book was released on 1988 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of severe convective storms in June 1987 by an 11-cm polarization diversity Doppler radar are described. Specific features include heavy rain, large hail, melting ice particles, lightning, and signal propagation effects. Of particular interest are the first measurements of the polarization differential reflectivity of lightning channels, which reveal the predominant orientations of the channels. Successive radar pulses were transmitted with alternating horizontal and vertical polarization by means of a high-power microwave switch to permit derivation of the differential reflectivity with a small standard error of estimate.

Book Design Study for a Coherent Polarization Diversity Radar

Download or read book Design Study for a Coherent Polarization Diversity Radar written by James I. Metcalf and published by . This book was released on 1980 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design concepts for a coherent polarization-diversity radar are presented. The desired capability is the measurement of microphysical parameters of hydrometeors, including thermodynamic phase, shape, size, orientation, and number density. The postulated use of a polarization-diversity radar is based on the relationships of these parameters to the anisotropy of the scattering and propagation media. The measurement objectives lead to the specification of primary and secondary coverage regions. Target detection within the primary region (less than 40 km range) and propagation effects lead to the specification of S-band and Ka-band as optimum frequency bands for observations of precipitation and clouds, respectively. Radar system parameters are specified, and schematic diagrams of system hardware are presented. Antenna design concepts and practical considerations are discussed. We discuss concepts of data processing and a possible computer-oriented implementation of radar control and data processing. (Author).

Book A Polarization Diversity Meteorological Radar System

Download or read book A Polarization Diversity Meteorological Radar System written by James I. Metcalf and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AFGL 10-cm Doppler weather radar was modified to enable the measurement of the differential reflectivity between horizontal and vertical polarizations in addition to the absolute reflectivity and the Doppler mean velocity and spectrum variance. Polarization switching is achieved by means of a diplexer, which separates at the antenna the transmitted signals of two frequencies, 2710 and 2760 MHz, and permits nearly simultaneous transmission of signals of orthogonal polarizations. Signals of these frequencies can be transmitted either with horizontal and vertical polarization, respectively, or with left and right circular, polarization, respectively. We describe the design and performance of the diplexer and the performance of the real-time data processor, present examples of meteorological measurements, and discuss future developments of the radar system. Keywords: Polarization diversity weather radar, Dual polarization radar, and Polarization switching.

Book Instrumentation Papers

Download or read book Instrumentation Papers written by and published by . This book was released on 1982 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An 11 cm Full matrix Polarimetric Radar for Meteorological Research

Download or read book An 11 cm Full matrix Polarimetric Radar for Meteorological Research written by James I. Metcalf and published by . This book was released on 1991 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Book Environmental Research Papers

Download or read book Environmental Research Papers written by and published by . This book was released on 1991 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monthly Catalogue  United States Public Documents

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1984 with total page 1140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Patent Abstracts Bibliography

    Book Details:
  • Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Program
  • Publisher :
  • Release : 1994
  • ISBN :
  • Pages : 654 pages

Download or read book NASA Patent Abstracts Bibliography written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Program and published by . This book was released on 1994 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Atmospheric Technology

Download or read book Atmospheric Technology written by and published by . This book was released on 1979 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Radar Target Imaging

    Book Details:
  • Author : Wolfgang-Martin Boerner
  • Publisher : Springer Science & Business Media
  • Release : 2012-12-06
  • ISBN : 3642851126
  • Pages : 205 pages

Download or read book Radar Target Imaging written by Wolfgang-Martin Boerner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar imaging, as understood here, involves target recognition, i.e. the determination of the detailed properties of an object (size, shape, structure and composition, and also location and speed) from radar echoes returned by it. Advanced approaches are required for this, and several of recent interest are discussed in this book. They include mathematical inverse-scattering techniques based on the solution of integral equations; use of the singularity expansion method (SEM), related to the resonance scattering theory (RST), in which the pattern of resonance-frequency location in the complex frequency plane can be employed to characterize a given radar target; and the use of polarization information. Finally, the measurement of radar cross-sections is described.

Book Radar Signal Processing and Its Applications

Download or read book Radar Signal Processing and Its Applications written by Jian Li and published by Springer. This book was released on 2013-12-21 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar Signal Processing and Its Applications brings together in one place important contributions and up-to-date research results in this fast-moving area. In twelve selected chapters, it describes the latest advances in architectures, design methods, and applications of radar signal processing. The contributors to this work were selected from the leading researchers and practitioners in the field. This work, originally published as Volume 14, Numbers 1-3 of the journal, Multidimensional Systems and Signal Processing, will be valuable to anyone working or researching in the field of radar signal processing. It serves as an excellent reference, providing insight into some of the most challenging issues being examined today.