Landsat Missions
The standard Landsat 7 Scan Line Corrector (SLC)-off browse image has been modified to illustrate the distribution of image effects caused by the SLC-off mode of acquisition. As of October 26, 2004, the browse image was enhanced (Figure 1) to include a visual estimation of the amount of data missing from an SLC-off product as it was acquired. Yellow gridlines are also included to indicate the expected width of the gap region (in pixels) across the scene.
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| Figure 1. Enhanced browse image showing estimate of missing data. | Figure 2. SLC-off browse showing optional yellow gridlines to indicate expected width of the gap region. |
Explanation of yellow gridlines
The numerical scale across the top and bottom of the browse image represents the width (in 30-meter image pixels) of missing data.
A standard 2-pixel interpolation is applied during Level 1 processing of all SLC-off Landsat 7 imagery. The area between the two solid lines represents the approximate portion of the scene that contains no missing data. The standard 2-pixel interpolation will still be applied to the rest of the image to make the final Level 1 product. The dashed lines indicate the approximate width (in pixels) of expected data gaps in the final product.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://landsat.usgs.gov
Page Contact Information: landsat@usgs.gov
Page Last Modified: November 23, 2009
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