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Mount Oyama Eruptions -- Terra Mission -- Data -- Tools -- CD Home |
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Information for the MISR Nadir (AN) granules
appearing on the EOSDIS Data Sampler #2
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Index |
ID for Data Product Provided on This CD |
Local Granule ID for LaRC DAAC Database |
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Sample #1 |
Not Provided |
MISR_AM1_GRP_TERRAIN _GM_P106_O003709_AN_03.hdf |
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Sample #2 |
MISR_AM1_GRP_ELLIPSOID _GM_P106_O003709_AN_03.hdf |
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Sample #3 |
MI1B2E_3709_AN_B62.hdf |
Not Provided |
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.
The CD provides three data sets that contain two-dimensional SDSs subset from the AN granule.
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Nadir |
Nadir |
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Nadir |
Nadir |
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Open page for Nadir |
Open page for |
The Collage tool does not correctly read the three-dimensional arrays in this data set. To overcome this difficulty, this CD provides three data sets that contain two-dimensional SDSs. The data sets are the three AN blocks (B62, B63, and B64) subset from the AN granule; they are located on this CD in the MISR directory.
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 AN Subset HDF-EOS Top Level Data Objects, generated earlier by manual editing from DIAL display.
Sample MISR AN Subset HDF-EOS Data File Attributes, generated earlier by the User Friendly Metadata (UFM) tool.
Sample MISR AN Structural Metadata, generated earlier by the User Friendly Metadata (UFM) tool.
Sample MISR AN Core Metadata, generated earlier by the User Friendly Metadata (UFM) tool.
The sample data are subset from the nadir granule (taken by the Nadir AN camera) for 3 blocks (Numbers 62, 63 and 64 out of a total of 180) from orbit 003709, path 106, on August 29, 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 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.
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.
