A 2004 Amercian Geophysical Union Conference Presentation by:
Schmugge, T (firstname.lastname@example.org) , USDA/ARS Hydrology and Remote Sensing Lab, Bldg. 007 – BARC West, Beltsville, MD 20705 United States
Ogawa, K (email@example.com) , Hitachi Ltd., 4-6 Kanda-Surugadai Chiyoda- Ku,, Tokyo, 101-8010 Japan
Ogawa, K (firstname.lastname@example.org) , Faculty of Engineering,University of Tokyo, University of Tokyo, Tokyo, 113-0033 Japan
Rokugawa, S (email@example.com) , Faculty of Engineering,University of Tokyo, University of Tokyo, Tokyo, 113-0033 Japan » Read more..
Emissivity makes a temperature difference for infrared thermometers.
In the YouTube video below, Frank Liebman, an engineer with Fluke Corporation’s Hart Scientific Division demonstrates the impact that surface emissivity has on temperature measurement and temperature calibration using a modified Fluke blackbody calibrator and Fluke Thermal Imager.
We were surprised to see that no one commented on this video, despite an ending that leaves one hanging, at least us, with the obvious question: How do you do a radiometric calibration of a surface of unknown emissivity using a Fluke Blackbody Calibrator?
Do you have any ideas?
Fill up two soda cans with hot water and wrap Flagyl ER one in scotch tape. Which one will cool down faster? Obvious, right?
Check it out, you might be surprised!
From the ITC Channel at YouTube.com
Chinese Journal of Oceanology and Limnology, Volume 5, Number 4, 363-369, DOI: 10.1007/BF02843818
“Measurement of the surface emissivity of turbid waters”, Liu Wenyao, R. T. Field, R. G. Gantt and V. Klemas
For interpreting thermal IR imagery of the ocean surface, the emissivity of the sea surface is usually assumed to be constant, approximately 0.98. However, the emissivity varies with the roughness of the sea surface, and the concentration and type of suspended particulates.
The emissivity variations caused by the suspended sediments introduce significant errors in the satellite-derived temperature maps of turbid coastal waters. » Read more..
“Infrared contrast of crude-oil-covered water surfaces“, by Wei-Chuan Shih and A. Ballard Andrews, Optics Letters, Vol. 33, Issue 24, pp. 3019-3021 (2008)
Abstract (Modified format for easier online viewing) » Read more..