Example of MISR Level 2AS data product
Appalachian Mountains, North America
The MISR team has developed new methods for retrieving information about clouds, airborne particles, and surface properties that capitalize on the instrument's unique, multi-angle imaging approach. This illustration, based upon results contained in products publicly available at the Atmospheric Sciences Data Center (ASDC), highlights some of these capabilities. The ASDC, located at NASA's Langley Research Center, is the primary processing and archive center for MISR data (http://eosweb.larc.nasa.gov).
These data were acquired by MISR on March 6, 2000, and extend from Lake Ontario to northern Georgia in the eastern United States. The panel at left is the downward-looking (nadir) view. The center-left panel was acquired by the forward-viewing 70.5-degree camera. At this increased slant angle, the line-of-sight through the atmosphere is three times longer, and a thin haze over the Appalachians is more apparent. MISR uses this enhanced sensitivity along with the variation of brightness with angle to monitor particulate pollution and to measure haze properties. The third panel is a map of the airborne particle (aerosol) amount, and describes a quantity derived using methods that take advantage of MISR's moderately high spatial resolution at very oblique angles. The aerosol results are obtained at coarser resolution than the underlying images; gradations from blue to red indicate increasing aerosol abundance. These data indicate how airborne particles are interacting with sunlight, a measure of their impact on Earth's climate. The fourth panel shows the Earth's surface, similar to panel 1, except that the measured effects of aerosols in the atmosphere have been removed.
These data products were generated from a portion of the imagery acquired during Terra orbit 1155. The panels cover an area of about 380 kilometers x 1520 kilometers, and utilize data from blocks 54 to 65 within World Reference System-2 path 17.
Image Credit: NASA/GSFC/JPL, MISR Team. Catalog No. PIA02629