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Thermal Radio Emission From The Surfaces Of Venus And Mercury

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Thermal Radio Emission From The Surfaces Of Venus And Mercury

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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.

Lunar Surface Studies

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Author :
language : en
Publisher:
Release Date : 1962

Lunar Surface Studies 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 Moon categories.

Polarization Of Thermal Emission From Venus

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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).

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1994

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.

Nasa Technical Memorandum

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Author :
language : en
Publisher:
Release Date : 1970

Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Aeronautics categories.

Journal Of Research Of The National Bureau Of Standards

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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1965

Journal Of Research Of The National Bureau Of Standards written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Ionospheric radio wave propagation categories.