The MISR Nadir (AN) camera views the Earth in a 360-km-wide swath, centered directly below Terra.

The Earth's surface is imaged in four wavelengths (blue, green, red, near-IR). Images at each angle are obtained in four spectral bands centered at 446, 558, 672, and 866 nm.

Click here for MISR Camera Definitions

The DIAL tool provides digital image processing to display the metadata as text and the processed data as an image.

These samples are subsets of the MISR Nadir (AN) GRP data set.

ID for Data Product Provided on This CD	ID for LaRC DAAC Database (to order full granule)	ID for DIAL site: Terra Sampler #1
MISR_TER_AN.sub	MISR_AM1_GRP_TERRAIN _GM_P040_AN.hdf	MISR_AM1_GRP_TERRAIN _GM_P040_AN
Not Provided	MISR_AM1_GRP_ELLIPSOID _GM_P040_AN.hdf	MISR_AM1_GRP_ELLIP _GM_P040_AN

The sample data are subset from the nadir granule (taken by the Nadir AN camera) for 3 blocks (Numbers 54, 55 and 56) from orbit 3734, path 40, on August 30, 2000. The data file for the nadir camera (AN) is larger because the data correspond to the higher spatial sampling rate of 275 m per pixel. Each block is 2048 pixels across track and 512 lines along track in 275-m resolution, with four spectral bands as separate Scientific Data Sets (SDSs).

The difference between L1B2 Ellipsoid and Terrain georectified radiances is in the altitude data used in the resampling algorithm. In the Ellipsoid product, this altitude is represented by the WGS84 ellipsoid. In the Terrain product, it is the altitude of the Earth's terrain.

The data subset covers the central part of the U.S. state of Idaho (Sawtooth Mountains and Snake River Plains), with adjacent parts of Montana (Bitterroot Range), and of Wyoming (under the clouds). Areas of interest include many national forests (Bitterroot, Boise, Challis, Nez Perce, Payette, Salmon, Sawtooth, Targhee), national monuments (Craters of the Moon, Hagerman Fossil Beds), and wilderness areas.

The sample includes clear-sky areas, areas with clouds, and areas with wildfire smoke and haze. Block 56 has it all: urban area (Boise, ID), lakes, rivers, sagebrush rangeland and farmland (Snake River Plains), lava flows, forested mountains, alpine mountains, granite ridges, talus slopes, alluvial fans, fire-burned areas, burning fires, smoke and haze, cloud shadows, and at least two types of clouds. The user wishing to read about this area as it was in 1900 is referred to the first few chapters of the U.S. Geological Survey Bulletin 199 (Russell, 1902, Geology and Water Resources of the Snake River Plains of Idaho).

Top of Page