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April 7, 2022

The USGS/NASA Landsat Flight Operations and Landsat Calibration and Validation Team have identified a number of Landsat 9 calibration intervals acquired from March 22-24, 2022, that were affected with the presence of the Moon in the data.

This caused an over-estimation of bias of affected detectors, resulting in darker streaks in Landsat 9 TIRS image data (see example image below). Landsat 9 OLI bands were not affected. This issue impacted 942 Landsat 9 Collection 2 scenes (30 hours of Earth imaging acquired between 3/22/2022 22:51 UTC and 3/24/2022 06:06 UTC).

The affected Landsat 9 scenes were reprocessed from April 6 - 7, 2022. As a result, reprocessing of the Level-1 products will propagate through to all Collection 2 Level-2 products for the same period. These scenes will become available on all USGS data access portals upon successful completion. 

The USGS recommends that users consider replacing any already downloaded Landsat 9 data and subsequently derived products from March 22, 2022 to March 24, 2022 with these newly reprocessed data products. Please note, the Product ID contains the most recent processing date that will facilitate identification of all scenes included in this reprocessing effort. 

Please contact EROS Customer Services with any questions about this reprocessing effort or the resulting data and products.

Example of Landsat 9 TIRS data impacted by the presence of the Moon.
Example of Landsat 9 TIRS data impacted by the presence of the Moon.