Infrared radiometry has an important role in space-based civilian, defense, and industrial applications. A facility to maintain an infrared scale for specialized applications was developed with funding from NIST, NASA, and the Department of Defense. In particular, the capability for measurements on large-area, vacuum-operational, blackbody sources operated from 200 K to about 400 K is being established. These measurements will be traceable to NIST via infrared radiometry through the radiance temperature of the source. An example of the type of scientific activity that the NIST facility supports is the use of satellites for the determination of temperature, based on radiance measurements, for the Earth's surface and atmosphere. These measurements are the basis for the study of global warming. A goal of the facility will be the development of infrared radiometers, which will be used to intercompare large-area blackbody sources used by contractors for NASA's Mission To Planet Earth Project.

This facility is not limited to infrared measurements. The capability to make comparisons of large area visible sources also will be possible. For both infrared and visible sources, users are able to bring their sources to NIST for calibration. This facility also is used for hosting intercomparisons of field radiometers, user sources, and training of key personnel. A multipurpose classroom is available where short courses and workshops on radiometry can be held.

Contact: Carol Johnson
Optical Technology Division