The ordered products show a high rate of duplicated lines. What are root causes of duplicated lines?
On the one hand, the curvature of the Earth curvature coupled with the satellite motion induces a partial addition to the image line during the map projection. On the other hand, if the amount of duplicated lines in Landsat 4&5 imagery are too important, these are due to inoperable or bad detectors. Also called line dropout, this is corrected by interpolating between the next adjacent lines, above and below the dropped line. This procedure is done at the L1 stage of processing. In the format, an appropriate flag is set to Y to notify to the user that such corrections have been performed.
