| Polarization Effects on Direction Finding Accuracy. |
MAY 1972 |
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| Authors:
Lee A. Morgan; Harry L. Blackwell; TELEDYNE/MICRONETICS SAN DIEGO CA
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 | The results of a systematic investigation of the effects of polarization upon the accuracy of DF systems are presented. Detailed analysis of polarization errors in phase interferometer, amplitude monopulse, and time-of-arrival (TOA) systems was performed. General error expressions for the first two systems and a method of computing the error for specific realizations of the third were obtained. It was found that the sensitivity to polarization errors for the interferometer ... |
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| INERTIALESS POLARIZATION SCANNERS. |
APR 1968 |
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| Authors:
M. E. Wallace; G. W. Ewell; L. A. Stapleton; GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION
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| The report discusses the principles of operation, the design, and the performance of a pair of X-band polarization-agile radar antennas, one for transmitting and one for receiving. These antennas are compatible with an existing pulse-Doppler radar and utilize front-fed 4-foot paraboloidal reflectors. The direction of linear polarization of these antennas can be rotated in digital increments on a pulse-to-pulse basis at prf's as high as 50 KHz. An electronic programmer ... |
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| ELECTRON SPIN POLARIZATION BY LOW ENERGY SCATTERING, |
APR 1968 |
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| Authors:
J. Kessler; STANFORD UNIV CALIF HIGH ENERGY PHYSICS LAB
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| The status of theory and experiment of electron polarization by scattering at energies between a few eV and a few keV is reviewed. Polarization effects in scattering from free atoms, molecules, and solid targets are discussed. Apart from a survey of the problems which have been solved, a perspective is given of the work which would be interesting to pursue in this rapidly developing field of research. (Author) |
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| RECEIVED POLARIZATION OF IONOSPHERICALLY PROPAGATED WAVES AS A FUNCTION OF TIME AND FREQUENCY. |
JAN 1968 |
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| Authors:
M. R. Epstein; O. G. Villard Jr; STANFORD UNIV CA STANFORD ELECTRONICS LABS
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| The incoming wave polarization of sweep-frequency CW radio transmissions was measured as a function of HF frequency and time of day for one-hop F-layer propagation over 1300 km N-S and 1900 km E-W temperate-latitude paths. Daytime rates of polarization rotation with frequency (at an instant of time) average 2 turns/MHz (equivalent to a null-to-null spacing of 250 MHz) over the N-S path, and 0.25 turn/MHz over the E-W path. These ... |
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| SURVEILLANCE TECHNOLOGY STUDY AND ANALYSIS. VOLUME V. POLARIZATION MONITOR DISPLAY INVESTIGATION. |
MAY 1967 |
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| Authors:
Carl Gerst; SYRACUSE UNIV RESEARCH CORP NY
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| This report presents results of studies, investigations, and technique developments which will be useful in future HF long range radar applications. This report is in five volumes. Volume 1 - covers the development of a multifilar helical contrawound antenna which may be suitable as the wideband radiating element for large HF array antennas. Volume 2 - evaluates the performance of an adaptive array operating in multipath environment. Comparisons between the ... |
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| RADAR EQUIPMENT FOR POLARIZATION INVESTIGATIONS OF CLOUDS AND PRECIPITATION, |
21 NOV 1966 |
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| Authors:
S. P. Morgunov; G. P. Trifonov; A. B. Shupyatskii; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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| Polarization methods for the analysis of echoes from clouds and precipitation have been developed recently. This article describes a radar apparatus which can be used to investigate the polarization characteristics of echoes from clouds and precipitation. The Laboratoriya radiolokatsii Tsentral'noy aerologicheskoy observatorii (Radar Laboratory of the Central Aerological Observatory) has developed a two-antenna radar set with a fixed beam and variable polarization of the signal. The system can transmit and ... |
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| REMOTE SIGNAL/NOISE TESTS IN POLARIZED NOISE. |
16 SEP 1966 |
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| Authors:
James N. Griffin; TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV
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| Rectilinear motion detectors are useful in the study of teleseismic depth phases. A detector has been developed which has controllable sensitivity to the phase and direction of ground motion. Input-output S/N tests were conducted on the detector, using as test data a P phase which had been inserted into signal-generated noise at several S/N ratios. In noise which was polarized in a different direction from the signal, the detectors with ... |
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| TECHNISCHE HOCHSCHULE FRIDERICIANA, KARLSRUHE, GERMANY. |
08 MAR 1966 |
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| Authors:
Charles Ravitsky; ARMY RESEARCH AND DEVELOPMENT GROUP (EUROPE) FPO NEW YORK 09510
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| The Connection Between Linear Polarization and Galactic Latitude of Discrete Radio Sources. |
1965 |
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| Authors:
P. Maltby; OWENS VALLEY RADIO OBSERVATORY PASADENA CA
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| The degree of linear polarization at a wavelength of about 21 cm is considered for 166 presumably extragalactic radio sources. A connection between degree of linear polarization and galactic latitude is found; low-latitude sources tend to show a lwer degree of polarization than high-latitude sources. It is found that the correlation between degree of polarizatin and galactic latitude is weaker at a wavelength equal to 10 cm than at 21 ... |
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| POLARIZATION COUPLING CURVES, |
27 JAN 1964 |
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| Authors:
Bernard J. Lamberty; SYLVANIA ELECTRONIC SYSTEMS-WEST MOUNTAIN VIEW CALIF ELECTRONIC DEFENSE LABS
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| This report presents curves of polarization coupling of antennas having various fixed values of axial ratio as a function of the axial ratio and orientation angle of incident waves. Some examples of the meaning and use of these curves for determining over-all system parameters are discussed. (Author) |
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| OBSERVATIONS OF THE OWENS VALLEY RADIO OBSERVATORY. 6. A CATALOG OF LINEAR POLARIZATION CHARACTERISTICS OF RADIO SOURCES IN THE WAVELENGTH RANGE 10 TO 21 CM, |
1964 |
15 pages |
| Authors:
D. Morris; G.L. Berge; OWENS VALLEY RADIO OBSERVATORY PASADENA CA
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 | A list of linear polarization measurements for 66 radio sources is presented. It includes values for 39 sources not previously reported on, plus a more complete set of values for sources previously described. Of these sources, approximately 40 have been examined at three different warelengths (10, 18 and 21 cm) and for those with appreciable polarization in this range the dependence of polarization on wavelength is given. The relationship between ... |
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| MAGNETIC SCATTERING OF NEUTRONS. |
31 DEC 1962 |
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| Authors:
KJELLER RESEARCH ESTABLISHMENT (NORWAY)
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| A crystal spectrometer with f.c.c. cobalt crys tals was used for producing a polarized, mono energetic neutron beam. The polarizing efficiency of a number of crystals was tested and a maximum polarization of 0.975 = 0.015 was measured. Magnetic guide-fields were shaped such as to give minimum depolarization. A nuclear magnetic resonance unit was constructed and found to flip the neutron spins with an efficiency of 99%, this number being ... |
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| STUDY OF THE POLARIZATION OF RADIATION FROM SOLAR CORONA, BASED ON OBSERVATION OF TOTAL SOLAR ECLIPSE ON FEBRUARY 25TH, 1952, |
13 OCT 1960 |
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| Authors:
M. A. Vashakidze; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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| An examination of photographic material obtained during the total solar eclipse over Turkmenian SSR in February 1952 resulted in the following conclusions concerning the polarization of the coronal radiation: (1) The fact that the corona is not spherically symmetrical with regard to radiation is again confirmed. (2) The degree of polarization is linked directly with solar activity. (3) Since the coronal luminescence is polarized radially, it is not necessary to ... |
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| A FOUR-COMPONENT POLARIZATION RESOLVER FOR MICROWAVES. |
APR 1960 |
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| Authors:
P. J. Allen; I. D. Olin; NAVAL RESEARCH LAB WASHINGTON D C
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| The report describes and theoretically analyzes a simple four-component polarization resolver which splits an arbitrarily polarized input signal into both linear and circular components, readily permitting their comparison. One version of the resolver has provision for local oscillator injection to permit linear conversion to i-f signals for more convenient processing. The same resolver can be used in an electronic polarimeter to obtain an instantaneous 'picture' of input signal polarization, along ... |
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| A SYSTEM FOR THE DYNAMIC MEASUREMENT OF RADAR RETURN POLARIZATION. |
APR 1960 |
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| Authors:
I. D. Olin; NAVAL RESEARCH LAB WASHINGTON D C
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| A polarization measurement program is presently being pursued in connection with a problem dealing with dynamic echo area measurement at several frequencies. Since the nature of the polarization data which will be received is not specifically known at this point, an interim system is being constructed prior to incorporating a polarization measurement facility within the overall area measurement equipment. This report describes the measurement technique employed in the interim system, ... |
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| APPLICATION OF BACKSIDE LUGGIN CAPILLARIES IN THE MEASUREMENT OF NONUNIFORM POLARIZATION |
03 APR 1954 |
1 pages |
| Authors:
M. EISENBERG; C.W. TOBIAS; C.R. WILKE; CALIFORNIA UNIV BERKELEY
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Reports by Keyword(s)
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