SpectralEmissivity & Emittance

| Useful Data | Practices Measuring or Avoiding | Background & Theory|

MGS Thermal Emission Spectrometer Data Archive & PDS TES Data Node

tes_silicates

TES Silicate/High-Silicon Glass Abundance on a Portion of Mars. Image by ASU & TES

MGS-TES Special Products

TES, The Thermal Emission Spectrometer at Arizona State University (ASU), is one of five instruments carried on the Mars Global Surveyor spacecraft (MGS).

MGS was launched in November 1996 and made the last transmission to Earth in November 2006.

Their website presents data from the TES instrument at Mars, as well as an introduction to infrared spectroscopy and access to the Spectral Library at Arizona State University.

You will also find links to many other Mars-related websites, including their very active ASU-Mars K-12 outreach program.

TES Bolometric Albedo Map

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Ultra-thin perfect absorber employing a tunable phase change material

New device hides, on cue, from infrared cameras

November 26, 2012

Tunable material developed at Harvard boasts nearly 100% absorption on demand

Cambridge, Mass. – November 26, 2012 – Now you see it, now you don’t.

A new device invented at the Harvard School of Engineering and Applied Sciences (SEAS) can absorb 99.75% of infrared light that shines on it. When activated, it appears black to infrared cameras.

Composed of just a 180-nanometer-thick layer of vanadium dioxide (VO2) on top of a sheet of sapphire, the device reacts to temperature changes by reflecting dramatically more or less infrared light.

Announced today in the journal Applied Physics Letters, and featured on its cover, this perfect absorber is ultrathin, tunable, and exceptionally well suited for use in a range of infrared optical devices.

Perfect absorbers have been created many times before, but not with such versatile properties. In a Fabry-Pérot cavity, for instance, two mirrors sandwich an absorbing material, and light simply reflects light back and forth until it’s mostly all gone. Other devices incorporate surfaces with nanoscale metallic patterns that trap and eventually absorb the light.
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Experimental verification of a multiband system for non-contact temperature measurements

Proc. SPIE 5258, 198 (2003); doi:10.1117/12.544574
Conference Title: IV Workshop on Atomic and Molecular Physics
Conference Chair: Jozef Heldt

Abstract

Adam Mazikowski and Marcin Gnyba
Gdansk Univ. of Technology (Poland)
Recent studies about non-contact temperature measurement concern passive multiband radiometric systems. These systems give a potential possibility of accurate temperature measurements in case of unknown and wavelength depended emissivity of the examined object. Modeling of such systems, what is usually the first stage of system designing, requires acceptance of several simplifications and approximations. In this paper an experimental verification of modeling result is performed. Based on developed experimental setup some tests are performed. It allows us to determine some systems parameters and whole system estimation.Read More

Publications of Robert O. Knuteson

Reference online: http://library.ssec.wisc.edu/publications/resultOnly.php?authorText=Knuteson,%20Robert%20O.&numOfRecs=25&currPage=1.

Sample Entries of the 38 records online at the University of Wisconsin Library:

1. Seemann, Suzanne W.; Borbas, Eva E.; Knuteson, Robert O.; Stephenson, Gordon R. and Huang, Hung-Lung. Development of a global infrared land surface emissivity database for application to clear sky sounding retrievals from multispectral satellite radiance measurements. Reprint # Journal of Applied Meteorology and Climatology, Volume 47, Issue 1, 2008, pp.108-123. Call Number: Reprint # 5663

2. Tobin, David C.; Antonelli, Paolo; Revercomb, Henry E.; Dutcher, Steven; Turner, David D.; Taylor, Joe K.; Knuteson, Robert O. and Vinson, Kenneth. Hyperspectral data noise characterization using principle component analysis: Application to the atmospheric infrared sounder. Reprint # Journal of Applied Remote Sensing, Volume 1, 2007, Doi:10.1117/1.2757707. Call Number: Reprint # 5392…