A newly released search application from the U.S. Geological Survey (USGS) helps users track Landsat products that have been reprocessed within Collection 2. While most of the data held in the USGS EROS Landsat archive are processed into a Collection only once, data affected by anomalies or disconnects may need to be reprocessed to replace impacted products.
Apart from planned large-scale reprocessing events (i.e., entire dataset reprocessing), only a small percentage of Landsat products are reprocessed. Satellite, sensor, or processing systems can all experience disconnects or anomalies that can cause issues during Landsat product generation - these can include instances where data storage or distribution systems experience unexpected outages that disrupt the flow of data during processing and causes data corruption. Additionally, some products received in support of the Landsat Global Archive Consolidation (LGAC) effort replace products already in the Landsat archive.
The Landsat Reprocessing Events application allows users to query and view a list of Landsat products that have been removed, along with products that have been reprocessed and added back into the inventory.
The application contains records for Landsat Level-1, U.S. Analysis Ready Data (ARD), Level-2 and Level-3 science products from October 1, 2023, to present and is updated monthly.
Individual search results can be downloaded, and a spreadsheet containing all records can be downloaded for further investigation.
Data users are encouraged to review the Landsat Reprocessing Events webpage to learn more about the contents of the search application. USGS EROS User Services staff are available to answer questions and help you understand your search results of the application.
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