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Отображаемые элементы 21999-22018 из 32023
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(1990-05)In this paper, results from a large set of steady state infiltration experiments made for a small rangeland catchment are presented. We report a geostatistical characterization of infiltration variability for the new data. ...
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(1990-05)In this paper a new set of infiltration data for a small rangeland catchment, described in the companion paper (Loague and Gander, this issue), is used to reexcite and reevaluate a quasi‐physically based rainfall‐runoff ...
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(1993-06-07)Measurements of radar echo strength have been carried out on Ronne and George VI Ice Shelves, Antarctica. The differences in ice‐column absorption between the two sites cannot be resolved by considering ice temperatures ...
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(1960-04)At the October 1959 meeting of the United States National Committee of the International Scientific Radio Union (URSI), a special symposium on radar astronomy was held. The symposium, which took the form of a panel discussion, ...
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(1965-06-01)The theory of enhanced radar attenuation due to nuclear explosions is developed here for radar paths outside the fireball region and for ionization produced by delayed γ rays. The basic equations are discussed, and a number ...
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Radar auroral echo characteristics as seen by a 398‐MHz phased array radar operated at Homer, Alaska(1974-11-01)In this paper we present the first results of the mapping of the spatial distribution of auroral echoes by a 398‐MHz phased array radar recently installed at Homer, Alaska. The results are shown in the form of two‐dimensional ...
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(1965-05-15)The experimentally measured dependence of the mean radar power backscattered from the lunar surface on the angle of incidence (delay time) is compared with the theoretical formula based on a lunar surface consisting of a ...
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(1969-12)Radar backscattering from the turbulent clear atmosphere is caused by irregular small‐scale fluctuations in the radio refractive index produced by turbulent mixing. This note considers the theoretical relationships between ...
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(1992-02-07)Orbital debris objects with sizes of 6 mm and larger were detected when they passed through the main beam of the high‐power, 12.6‐cm wavelength radar at the Arecibo Observatory. The number of objects detected at altitudes ...
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(1988-05-20)VHF radar observations at Jicamarca show that the most intense mesospheric echoes at the equator are returned from thin horizontal layers with lifetimes ranging from tens of minutes to many hours. A few such layers may be ...
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(1991-01)A multiple‐receiver radar technique for imaging the spatial distribution of ionospheric plasma irregularities is introduced and demonstrated with equatorial electrojet data obtained at the Jicamarca Radio Observatory. The ...
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(1992-12-29)Topographic information is required for many geological and geophysical investigations. For example, detailed topographic data alone can be used to map geological structure and thus reveal the effects of tectonic deformation. ...
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(1995-03-01)Ice penetrating radar measurements made over the summit region of Greenland show returns from internal layers which can be used to augment the interpretation of climate information from the two deep cores recently recovered ...
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(1960-09)Radar reflections from the moon have been studied utilizing the Trinidad, BWI, radar operating in the 400‐Mc/s frequency range. The moon has been tracked from moonrise through transit during periods of sunset. On all ...
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(1970-02)A map of the surface reflectivity of Venus at a wavelength of 3.8 cm is obtained by using a fixed base line radar interferometer. The two‐fold hemispheric ambiguity in the range‐Doppler map has been resolved by interferometry. ...
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(1970-02)Polarized and depolarized radar maps of the moon have been obtained at the Arecibo Ionospheric Observatory at a wavelength of 70 cm. These maps show strong positive anomalies, many of which are associated with young craters. ...
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(1980-11-10)Radar measurements from Chryse Planitia in 1978 confirm earlier estimates of 4°–5° rms slope (on meter scales) over 45°–50°W longitude. The new measurements also confirm a skewing of the measured spectra. This has now been ...
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(1966-09)Radar applications for measurement of areal precipitation are reviewed. Radars with a beam width of 2° or less and a wavelength of 10 cm should provide improved measurements of areal rainfall and more timely and comprehensive ...
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(1976-03-01)The phase velocity of type 1 irregularities in the equatorial electrojet, which can be easily measured by radar, depends upon both the ion acoustic velocity (and hence the temperature) in the medium and the neutral wind ...
Отображаемые элементы 21999-22018 из 32023