Landsat Missions
The Level 0 Radiometrically corrected (L0Rp) Scan Line Corrector (SLC)-off data product contains alternating areas of duplicated scan lines (14 pixels wide) along the edge of the scene (Figure 1). The width of the duplicated regions gradually diminishes toward the center of the scene. The center of the image contains nominal image data (Figure 2).
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| Figure 1. L0Rp product, showing duplication along the scene edge. |
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| Figure 2. L0Rp product, showing nominal image data at the scene center. |
There are different approaches to correcting for the duplication of pixels on SLC-off products. The U.S. Geological Survey (USGS) Center for Earth Resources Observation and Science (EROS) provides the option of four techniques in order to produce the current L1G SLC-off products: 1) interpolating the missing values from neighboring scan lines; 2) replacing the duplicated lines with null values; 3) replacing the missing pixels with histogram-matched data from alternate acquisition dates; 4) using a multi-scale segmentation model to fill the gaps with same-scene data.
An Algorithm Theoretical Basis Document (ATBD) - .pdf (156 KB) has been prepared for USGS processing of SLC-off Landsat 7 data. This information may also benefit users of other existing Level 1 processing systems.
To download samples of any SLC-off products, see the Sample Products page.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://landsat.usgs.gov
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Page Contact Information: landsat@usgs.gov
Page Last Modified: May 12, 2008
