On April 30, 2017, forward processing of Landsat 7 and Landsat 8 Pre-Collection datasets will be turned off. Only forward processing for Landsat Collection 1 data will continue. The existing Landsat 7 and Landsat 8 Pre-Collection datasets will be retained for some time after forward processing is turned off (specific timeframe is yet to be determined). Announcements will be made to alert users when each dataset has completed Collection 1 processing and when the Pre-Collection datasets will be removed. Users are strongly encouraged to start utilizing Collection 1 data.
The Landsat Collections Web page contains the details about all aspects of the Collection 1 effort.