Mount Oyama Eruptions -- Terra Mission -- Data -- Tools -- CD Home

Information for the MISR Oblique Aft (CA) granules
appearing on the EOSDIS Data Sampler #2

The MISR Oblique Aft (CA) camera views the Earth in a 360-km-wide swath, centered on the flight path but at a look angle of 60 degrees aft of nadir.

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.

MISR Oblique (CA), Ellipsoid-projected Thumbnail Images
(contrast enhanced by low and high value truncation)
(band images NOT adjusted R-L)

Oblique Blocks 62-64 Blue Band (148 KB)	Oblique Blocks 62-64 Green Band (148 KB)
Oblique Blocks 62-64 Red Band (216 KB)	Oblique Blocks 62-64 IR Band (140 KB)
Open page for Oblique Blocks 62-64 3-band Natural Color Composite (496 KB)	Open page for MISR Camera Definitions

The DIAL tool provides digital image processing to display the metadata as text and the processed data as an image. The .odl file output from DIAL is processed by the User Friendly Metadata (UFM) tool to present the metadata in a more readable form

Sample MISR CA Subset HDF-EOS Data File Attributes, generated earlier by the User Friendly Metadata (UFM) tool.

Sample MISR CA Structural Metadata, generated earlier by the User Friendly Metadata (UFM) tool.

Sample MISR CA Core Metadata, generated earlier by the User Friendly Metadata (UFM) tool.

The sample data are subset from the Oblique Aft (CA) granule (the Oblique Aft (CA) camera) for 3 blocks (Numbers 63, 62 and 64) from orbit 003709, path 106, on August 29, 2000. The data file for the red band is larger because the data correspond to the higher spatial sampling rate of 275 m per pixel while the other bands have a spatial sampling rate of 1.1 km. Each block is 2048 samples across-track and 512 lines along-track in 275 m sampling (512 pixels by 128 pixels at 1.1 km), with four spectral bands as separate Scientific Data Sets (SDSs).

The MISR GRP AN and CA data files on this CD are the ELLIPSOID-projected data. Additional MISR GRP ELLIPSOID-projected data files for other cameras are on the Web version of this CD. The ELLIPSOID-projected data enables users to make stereo images from the AN and CA data.

The difference between L1B2 Ellipsoid and Terrain georectified radiances is in the altitude data used. In order to resample the data from the nine MISR cameras to the Space Oblique Mercator (SOM) grid, it is necessary to assign an altitude to each location on the grid. 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.

Fill data in the TERRAIN-projected data sets represents areas on the Space Oblique Mercator (SOM) grid that could NOT be observed by the CA camera, due to its 60-degree aft look angle. This artifact of the TERRAIN-projected data is minimal in flat areas and does not appear in ELLIPSOID-projected data.

The data subset covers the southeastern part of the Japanese island of Honshu. Areas of interest include many volcanoes and volcanic islands (Ohshima, Niijima and Miyakejima), and the cities of Tokyo and Yokohama.

The sample includes clear-sky areas, areas with scattered clouds, and areas with volcanic smoke and haze.

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