Read Thermal Models and Microwave Temperatures of the Planet Mercury

Thermal Models and Microwave Temperatures of the Planet Mercury

David Morrison

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Description:Several physical properties of the epilith of Mercury can be investigated by a comparison of infrared and microwave brightness temperature with the predictions of theoretical thermal models of the planet. The results presented here have been obtained by numerical solution of the one-dimensional heat-conduction equation with temperature-dependent thermal conductivity, using surface boundary conditions that include the modification of the insolation cycles by the spin-orbit coupling and large orbital eccentricity of the planet. For comparison with microwave observations, disk-averaged brightness temperatures are presented as a function of phase angle and heliocentric longitude of Mercury for wavelengths of 0.12, 0.34, 0.80, 1.90, 3.75, and 11.30 cm. These predictions are compared with calculations from simpler lunar-type models and are used to analyze the existing infrared and microwave observations of the planet. A means of determining observationally both the mean thermal parameter (Kpc)^-1/2 cal^-1 cm2 sec^1/2 deg and the significance of an effective conductivity due to radiative thermal-energy transport is presented. The observations of a microwave phase effect are all found to be compatible with a ratio of electrical to thermal skin depths approximately equal to the wavelength. The thermal parameter is, from infrared observations, larger than 200 cal^-1 cm2 sec^-1/2 deg, indicating a thermal conductivity less than 10^-4 cal cm^-1 sec^-1 deg. The loss tangent of the material is greater than 2 X 10^-3. Although some contradictions are present, the observations strongly suggest an increase of mean brightness temperature with wavelength, indicating a significant radiative contribution to the subsurface thermal conductivity. All these conclusions are consistent with the hypothesis that the epilith of Mercury is physically very similar to that of the Moon.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Thermal Models and Microwave Temperatures of the Planet Mercury. To get started finding Thermal Models and Microwave Temperatures of the Planet Mercury, you are right to find our website which has a comprehensive collection of manuals listed.
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Pages: 90

Format: PDF, EPUB & Kindle Edition

Publisher: —

Release: 1969

ISBN: wrRCAQAAIAAJ

Description: Several physical properties of the epilith of Mercury can be investigated by a comparison of infrared and microwave brightness temperature with the predictions of theoretical thermal models of the planet. The results presented here have been obtained by numerical solution of the one-dimensional heat-conduction equation with temperature-dependent thermal conductivity, using surface boundary conditions that include the modification of the insolation cycles by the spin-orbit coupling and large orbital eccentricity of the planet. For comparison with microwave observations, disk-averaged brightness temperatures are presented as a function of phase angle and heliocentric longitude of Mercury for wavelengths of 0.12, 0.34, 0.80, 1.90, 3.75, and 11.30 cm. These predictions are compared with calculations from simpler lunar-type models and are used to analyze the existing infrared and microwave observations of the planet. A means of determining observationally both the mean thermal parameter (Kpc)^-1/2 cal^-1 cm2 sec^1/2 deg and the significance of an effective conductivity due to radiative thermal-energy transport is presented. The observations of a microwave phase effect are all found to be compatible with a ratio of electrical to thermal skin depths approximately equal to the wavelength. The thermal parameter is, from infrared observations, larger than 200 cal^-1 cm2 sec^-1/2 deg, indicating a thermal conductivity less than 10^-4 cal cm^-1 sec^-1 deg. The loss tangent of the material is greater than 2 X 10^-3. Although some contradictions are present, the observations strongly suggest an increase of mean brightness temperature with wavelength, indicating a significant radiative contribution to the subsurface thermal conductivity. All these conclusions are consistent with the hypothesis that the epilith of Mercury is physically very similar to that of the Moon.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Thermal Models and Microwave Temperatures of the Planet Mercury. To get started finding Thermal Models and Microwave Temperatures of the Planet Mercury, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Thermal Models and Microwave Temperatures of the Planet Mercury

Thermal Models and Microwave Temperatures of the Planet Mercury

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