Theory

Determining the emittance of solids

February 17, 2008

Cavity methods for determining the emittance of solids E. M. Sparrow, P. D. Kruger, and R. P. Heinisch Applied Optics, Vol. 12, Issue 10, pp. 2466- (1973) Citation E. M. Sparrow, P. D. Kruger, and R. P. Heinisch, “Cavity methods for determining the emittance of solids,” Appl. Opt. 12, 2466- (1973)

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The InfraRed Sea Surface Emissivity (IRSSE) model

November 23, 2007

From Paul van Delst’s Work Page at The Cooperative Institute for Meteorological Satellite Studies of the University of Wisconsin – Madison Space Science and Engineering Center. The InfraRed Sea Surface Emissivity (IRSSE) model was developed for use in the Global Data Assimilation System (GDAS) at NCEP/EMC. Previously, the GDAS used an IRSSE model based on [...]

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Infrared Sea Surface Emissivity

October 9, 2007

“The InfraRed Sea Surface Emissivity (IRSSE) model was developed for use in the Global Data Assimilation System (GDAS) at NCEP/EMC. Previously, the GDAS used an IRSSE model based on Masuda et al (1988). “The Masuda model doesn’t account for the effect of enhanced emission due to reflection from the sea surface (only an issue for [...]

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Emissivity Measurements on Metallic Surfaces with Various Degrees of Roughness:

October 8, 2007

A Comparison of Laser Polarimetry and Integrating Sphere Reflectometry: Proceedings of the Fifteenth Symposium on Thermophysical Properties, Part I Authors: Seifter A.1; Boboridis K.2; Obst A.W.2 Source: International Journal of Thermophysics, Volume 25, Number 2, March 2004 , pp. 547-560(14) Publisher: Springer Abstract: Both integrating sphere reflectometry (ISR) as well as laser polarimetry have their [...]

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STANDARDIZATION OF THERMAL EMITTANCE MEASUREMENTS. PART 5

September 28, 2007

Title: STANDARDIZATION OF THERMAL EMITTANCE MEASUREMENTS. PART 5. NORMAL SPECTRAL EMITTANCE, 800-1400 K (ABSTRACT BELOW) DOWNLOAD FULL REPORT IN PDF FORMAT Corporate Author : NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD Personal Author(s) : Harrison, William N. ; Richmond, Joseph C. ; Shorten, Frederick J. ; Joseph, Horace M. Handle / proxy Url : http://handle.dtic.mil/100.2/AD426846 Report [...]

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NASA Tech Reports Emittance Abstracts

September 20, 2007

A Search on the NASA website results in the following abstracts   DETERMINATION OF THE EMISSIVITY OF MATERIALS Author(s): Askwyth, W. H. Abstract: Space power systems – emissivity of candidate materials for snap-8 powerplant NASA Center: NASA (non Center Specific) Publication Year: 1962 Added to NTRS: 2006-11-06 Accession Number: 63N11697; Document ID: 19630001823; Report Number: [...]

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Optical Properties Measurements, Data and 3D Models

September 18, 2007

Surface Optics Corporation (SOC) operates a world-class measurement facility equipped for the most demanding spectral measurement tasks for spectral directional and bidirectional reflectance measurements for modeling, simulation, special effects and more. Spectral measurements can be made in wavelength regions from the ultraviolet to long wave infrared and include one or all of the following types [...]

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Beginner’s Guide to (Spectral) Emissivity

September 8, 2007
Sketch of the concept of spectral emissivity measurement

Introductory Guide to Emissivity This is an introductory page on the National Physical Laboratory (NPL) website in the UK. It has several such sketches as on the left showing the concept of the “radiometric method” of emissivity measurement and discusses both the concepts and measurement methods used to quantify spectral and total emissivity values. The [...]

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Red, White & Blue Blackbodies?

September 5, 2007

It is not an oxymoron, nor a quote from Yogi Berra. Real Blackbodies do not exist, at least on Earth. Only approximations or simulations are real. We use them to calibrate IR Thermometers, Radiation Pyrometers and Thermal Imagers. Technically they should have a spectral emissivity very close to 1.0. How close, you might ask? Read [...]

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TES and Spectral Emissivity Curves: Quartz, Feldspar & Hornblende

August 26, 2007
Quartz, Feldspar & Hornblende Spectral Emissivies

This linked website discusses the background and flight of the instrument and also provides some interesting spectral emissivity curves for Quartz (SiO2), Feldspar* and Hornblende** and an equal mixture of the two, The TES instrument first flew aboard the Mars Observer spacecraft that was lost. The TES instrument was rebuilt and launched along with instruments [...]

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