This site has moved to www.usgs.gov/landsat
Please visit the new site and update any bookmarks you have. 
 

Question:

How do Landsat 7 ETM+ SLC-off data products compare to previous Landsat 7 data?

Answer:

The primary difference between an SLC-off Landsat 7 product and data collected prior to the anomaly will be the presence of duplicated data (Level-0R) or missing data (Level-1 data product) in the SLC-off image, most pronounced along the edge of the scene, and gradually diminishing toward the center. Approximately 20 percent of the scene center is non-gapped data; and an estimated 22 percent of any given scene is lost because of the SLC-off failure.

Methods have been developed to increase the utility of the SLC-off data. These can be found on the Landsat 7 page.