Skip to Main Content U.S. Department of Energy
Science Directorate
Page 596 of 611

Atmospheric Sciences & Global Change
Research Highlights

June 2005

Correction Method for Infrared Detector Confirmed; Error in Clear Sky Bias Condition Remains Unresolved

To obtain accurate, high-spectral resolution ground-based observations of infrared radiation, the Department of Energy's Atmospheric Radiation Measurement (ARM) Program uses a sensor called an Atmospheric Emitted Radiance Interferometer (AERI). The AERI instrument uses a mercury cadmium telluride (MCT) detector, which provides excellent sensitivity to infrared radiance from 5-25 μm. The MCT detector, however, has a non-linear response, which means that its output is not linearly proportional in wavelength to the measured radiant energy. A set of experiments conducted by ARM researchers in November 2003 and January 2004 confirmed the accuracy of a nonlinearity correction for calibrating the MCT detector, and also ruled out this procedure as the source of error found in clear, dry conditions calculated by a line-by-line radiative transfer model (LBLRTM).

Page 596 of 611

Science at PNNL

Core Research Areas

User Facilities

Additional Information

Research Highlights Home


Print this page (?)

YouTube Facebook Flickr TwitThis LinkedIn