Landsat 7 ETM+ SLCoff data refers to all Landsat 7 images collected after May 31, 2003, when the Scan Line Corrector (SLC) failed. These products have data gaps, but are still useful and maintain the same radiometric and geometric corrections as data collected prior to the SLC failure. This video shows how to correct the Scanline errors for Landsat 7 level 2 without the gap mask.