Emissivity: Characteristics, Determination and Applications


Aidan Millington (Editor)

Series: Physics Research and Technology
BISAC: SCI058000

Emissivity: Characteristics, Determination and Applications opens with an overview of a variety of remote sensing retrieval methods of land surface emissivity from space. The authors provide some theoretical background about land surface emissivity and recall various retrieval methods.

During the atmospheric hypersonic re-entry of a space vehicle, the extremely high temperatures generated in the shock layer between the bow shock and the vehicle lead to very high temperatures at the wall, the values of which depend mainly on the total heat flux impinging the surface, and its emissivity. The higher the emissivity of the surface, the lower the temperature that is achieved. Thus, in order to perform reliable temperature predictions at the surface during space re-entry into the atmosphere, the authors suggest that proper knowledge of material surface emissivity is mandatory.

In the penultimate chapter, the emissivity due to neutrino-pair production in e+e- annihilation in the context of the 331RHν model is calculated in a way that can be used in supernova models.

Lastly, a photoacoustic cell is constructed to view two different surfaces through a pair of out of phase optical chopping wheels records the difference in radiation fluxes from the two surfaces. The point at which a lock-in amplifier records a null in the photoacoustic signal is where the radiation fluxes from the two surfaces are identical, permitting the relative emissivities of the two surfaces to be determined.
(Imprint: Nova)

Table of Contents

Table of Contents


Chapter 1. Retrieval Land Surface Emissivity and Its Applications of Optical Remote Sensing Data
(Emami Hassan, PhD, University of Tabriz, Tabriz, Iran)

Chapter 2. Experimental Methods for Spectral Emissivity Evaluation of Space Re-Entry Vehicle Materials
(Carlo Purpura and Eduardo Trifoni, PWT Test Engineering Group, CIRA, Centro Italiano Ricerche Aerospaziali, Capua, Italy)

Chapter 3. The Emissivity of Neutrinos in Supernova beyond the Standard Model: 331RHν Model
(A. Gutiérrez-Rodrıguez, A. Burnett-Aguilar and M. A. Hernández-Ruíz, Unidad Académica de Física, Universidad Autónoma de Zacatecas, Zacatecas, México, and others)

Chapter 4. Determination of Infrared Emissivities with a Differential Photoacoustic Detector
(Yaqi Zhang and Gerald J. Diebold, Department of Chemistry, Brown University, Providence, RI, US)


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