A Polarization Diversity Meteorological Radar System - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook A Polarization Diversity Meteorological Radar System write by James I. Metcalf. This book was released on 1987. A Polarization Diversity Meteorological Radar System available in PDF, EPUB and Kindle. 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.
A Polarization Diversity Meteorological Radar System
A Polarization Diversity Meteorological Radar System - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook A Polarization Diversity Meteorological Radar System write by James I. Metcalf. This book was released on 1987. A Polarization Diversity Meteorological Radar System available in PDF, EPUB and Kindle. 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.
Precipitation and Lightning Measurements by Polarization Diversity Radar
Precipitation and Lightning Measurements by Polarization Diversity Radar - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Precipitation and Lightning Measurements by Polarization Diversity Radar write by James I. Metcalf. This book was released on 1988. Precipitation and Lightning Measurements by Polarization Diversity Radar available in PDF, EPUB and Kindle. 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.
Analysis of a Polarization Diversity Weather Radar Design
Analysis of a Polarization Diversity Weather Radar Design - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Analysis of a Polarization Diversity Weather Radar Design write by J. S. Ussailis. This book was released on 1982. Analysis of a Polarization Diversity Weather Radar Design available in PDF, EPUB and Kindle. This report focuses not only on a design for a pulse-to-pulse polarization diversity modification of the Air Force Geophysics Laboratory (AFGL) S-band Doppler weather radar, but also upon the meteorological and technical requirements of such a radar. The theoretical aspects of and physical limitations imposed by the polarization diversity requirement are presented independently of this design and as a result are applicable towards the development of any similar system. The antenna modification could also be applied towards the general case, excepting the condition imposed in this design that the present twenty-four foot diameter reflector be retained. Formulae are developed to demonstrate the various uncertainties for the system as a whole and the antenna in particular. Tradeoffs between the various meteorological measurement goals vs available and constructible radio frequency components are presented.
Polarization Diversity Addition to the 10 Centimeter Doppler Weather Radar
Polarization Diversity Addition to the 10 Centimeter Doppler Weather Radar - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Polarization Diversity Addition to the 10 Centimeter Doppler Weather Radar write by James S. Ussailis. This book was released on 1984. Polarization Diversity Addition to the 10 Centimeter Doppler Weather Radar available in PDF, EPUB and Kindle. The research performed was that of providing antenna modifications for a polarization diversity addition to the; AFGL 10 centimeter DOPPLER WEATHER RADAR. Described within are the ANTENNA FEED DESIGN (POTTER HORN), the conversion of the antenna form a prime focus to a Cassegrain Configuration, the results of the feed horn RF measurements, the construction of the POLARIZER ASSEMBLY, and the installation and testing of the antenna system. Keywords include: Polarization; Potter horn; Weather radar; Polarized unit; and Antenna testing.
