Radio Emission Of Venus
DOWNLOAD
Download Radio Emission Of Venus PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Radio Emission Of Venus book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Radio Emission Of Venus
DOWNLOAD
Author : A. G. KISLYAKOV
language : en
Publisher:
Release Date : 1962
Radio Emission Of Venus written by A. G. KISLYAKOV and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with categories.
Radio emission from Venus on the 4-mm wavelength was measured from March to May of 1961, with the 22-meter radio telescope. Periodic standardization of the signals was carried out during the observations. The lunar radio emission was measured to determine the brightness temperature of Venus. (Author).
Radio Astronomical Observations Of Venus With High Resolving Power
DOWNLOAD
Author : D. V. KOROL'KOV
language : en
Publisher:
Release Date : 1963
Radio Astronomical Observations Of Venus With High Resolving Power written by D. V. KOROL'KOV and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.
During October-November of 1962 observations were carried out of the radio emission from Venus on 3.02 cm wavelength by means of a large Pulkovo radio telescope with a variable profile antenna. The purpose of these investigations was to evaluate the nature of the distribution of radio brightness, by using high resolving power and high precision of the coordinate measurements with a variable profile antenna. A divergence between the optical and radiomethods cannot be explained by the presence of high radiation belts as in the case with the Jupiter. Radio emission is practically absent at a distance of 1.07R from the center of the disk of the planet, i.e. the height of the radiation region does not exceed 420 km above the cloud cover of Venus. The results of measurements of the effective dimensions of Venus are shown. An attempt to determine the phase variations of radio temperature with displacement of the center of gravity of radio emission led to a negative result. The observations agree best of all with the model of a hot surface and cold atmosphere.
Thermal Radio Emission From The Surfaces Of Venus And Mercury
DOWNLOAD
Author : Bruce Douglas Chapman
language : en
Publisher:
Release Date : 1986
Thermal Radio Emission From The Surfaces Of Venus And Mercury written by Bruce Douglas Chapman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
8 35 Mm Radio Emission From Jupiter And Venus
DOWNLOAD
Author : Douglas Donald Thornton
language : en
Publisher:
Release Date : 1963
8 35 Mm Radio Emission From Jupiter And Venus written by Douglas Donald Thornton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with Jupiter (Planet) categories.
Radio Emission Of The Sun And Planets
DOWNLOAD
Author : V. V. Zheleznyakov
language : en
Publisher: Elsevier
Release Date : 2013-09-03
Radio Emission Of The Sun And Planets written by V. V. Zheleznyakov and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-03 with Science categories.
International Series of Monographs in Natural Philosophy, Volume 25: Radio Emission of the Sun and Planets presents the origin of the radio emission of the planets. This book examines the outstanding triumphs achieved by radio astronomy of the solar system. Comprised of 10 chapters, this volume begins with an overview of the physical conditions in the upper layers of the Sun, the Moon, and the planets. This text then examines the three characteristics of radio emission, namely, the frequency spectrum, the polarization, and the angular spectrum. Other chapters consider the measurements of the intensity of the solar radio emission, which indicate the existence of a lower limit. This book discusses as well the complex phenomena of the sporadic solar radio emission. The final chapter deals with the theory of the radio emission of Venus. This monograph is a valuable resource for radio astronomers and astrophysicists who are interested in the state of investigations in galactic radio astronomy.
Radiometric Observations Of The Planets Jupiter Venus And Mars At A Wavelength Of 8 6 Millimeters
DOWNLOAD
Author : P. M. Kalaghan
language : en
Publisher:
Release Date : 1967
Radiometric Observations Of The Planets Jupiter Venus And Mars At A Wavelength Of 8 6 Millimeters written by P. M. Kalaghan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Jupiter (Planet) categories.
Observations of the 8.6 mm radio emission from the planets Jupiter, Venus, and Mars are reported. Average disc temperatures of 140 (+18, -14)K for Jupiter, 423 (+55, -34)K for Venus over the 51 degrees to 62 degrees phase angle range, and 235 (+45, -33)K for Mars were obtained. (Author).
Polarization Of Thermal Emission From Venus
DOWNLOAD
Author : James B. Pollack
language : en
Publisher:
Release Date : 1964
Polarization Of Thermal Emission From Venus written by James B. Pollack and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
Thermal emission from a specific locale on a planetary surface is, in general, polarized, because the emissivities parallel and perpendicular to the plane of incidence are unequal. A radio telescope unable to resolve the planet will observe a net polarization in the thermal emission for appropriate asymmetries in the surface distribution of temperature, T, or dielectric constant, epsilon. Illustrative calculations indicate that the integrated polarization of the 3-cm radiation from Venus is probably between 0.35 and 2 per cent, which is close to or slightly below the capability of existing radio telescopes. A possibly more promising method of determining the polarization of Venus radio emission is provided by interferometry. Under certain, probably valid, approximations, a complete set of observations with one-dimensional resolution across the planetary disk can obtain the two-dimensional distribution of epsilon and T across the disk, and the obliquity of the axis of rotation. The observed integrated brightness-temperature phase effect requires a surface temperature difference between subsolar and antisolar point approximately 400 K. An analysis is made of the incomplete set of interferometric observations of Venus obtained at Owens Valley Radio Observatory by Clark and Spencer. These observations are shown to be consistent with the radar reflectivity and microwave phase effect of Venus if the surface temperature varies markedly (approximately 500 K) between the subsolar point and the pole. (Author).
Radiophysics 1965 1966
DOWNLOAD
Author : Arkadiĭ Dmitrievich Kuzʹmin
language : en
Publisher:
Release Date : 1969
Radiophysics 1965 1966 written by Arkadiĭ Dmitrievich Kuzʹmin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Radar in astronomy categories.
Reduction And Analysis Of Seasons 15 And 16 1991 1992 Pioneer Venus Radio Occultation Data And Correlative Studies With Observations Of The Near I
DOWNLOAD
Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-12-28
Reduction And Analysis Of Seasons 15 And 16 1991 1992 Pioneer Venus Radio Occultation Data And Correlative Studies With Observations Of The Near I written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-28 with Science categories.
Radio occultation experiments, and radio astronomical observations have suggested that significant variations (both spatial and temporal) in the abundances of sulfur-bearing gases are occurring below the Venus cloud layers. In addition, recent Near Infra-Red images of the nightside of Venus revealed large-scale features which sustain their shape over multiple rotations (the rotation periods of the features are 6.0 +/- 0.5 days). Presumably, the contrast variations in the NIR images are caused by variations in the abundance of large particles in the cloud deck. If these particles are composed of liquid sulfuric acid, one would expect a strong anticorrelation between regions with a high abundance of sulfuric acid vapor, and regions where there are large particles. One technique for monitoring the abundance and distribution of sulfuric acid vapor (H2SO4) at and below the main Venus cloud layer (altitudes below 50 km) is to measure the 13-cm wavelength opacity using Pioneer Venus Orbiter Radio Occultation Studies (PV-ORO). We are working to characterize variations in the abundance and distribution of subcloud H2SO4(g) in the Venus atmosphere by using a number of 13-cm radio occultation measurements conducted with the Pioneer Venus Orbiter near the inferior conjunction of 1991. When retrieved, the vertical profiles of the abundance of H2SO4(g) will be compared and correlated with NIR images of the night side of Venus made during the same period of time. Hopefully, the combination of these two different types of data will make it possible to constrain or identify the composition of the large particles causing the features observed in the NIR images. Considered on their own, however, the parameters retrieved from the radio occultation experiments are valuable science products. Jenkins, Jon M. Ames Research Center NASA-CR-194128, NAS 1.26:194128 NCC2-753...
Temperature Of Venus
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1962
Temperature Of Venus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with categories.
Radio emission from Venus was measured with a 22-m radio telescope during the period of inferior conjunction in 1961. From the middle of March to the beginning of June, observations were made at wavelengths of 4 and 8 mm and 9.6 cm and from 26 May through 10 July, at the 3.3cm wavelength. The shifting of the brightness temperature minimum from the point of inferior conjunction to the eastern elongation indicates that the rotation of Venus occurs in the same direction as its revolution around the sun. The shifting is also considered to support the hypothesis that the rotation period is not equal to the revolution period. The wide variations in temperature may be attributed to changes in electron accumulations in the Venusian ionosphere.