Landsat Collection 2 Reprocessing of Landsat 8 Images Acquired in 2015
During Landsat Collection 2 data processing in 2020, several Landsat 8 images acquired from November 1 and November 2, 2015 were processed to Level-1 products with misaligned Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) spectral bands. These images were quickly identified and removed from the USGS archive soon after the release of Collection 2 on December 1, 2020.
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An investigation into this event determined that a software update made to the TIRS Scene Select Mechanism (SSM) encoder disabled the process that was used to correct a previous SSM encoder hardware anomaly. This caused the upper bits of the SSM encoder to become fixed in an “on” state. This led to an incorrectly calculated TIRS SSM angle, which resulted in OLI and TIRS spectral band misalignment of the images listed in the table below.
On February 17, 2021, the impacted Collection 2 data products will be reprocessed and made available for download via EarthExplorer.
| Date | Paths | Rows |
|---|---|---|
| Nov 1, 2015 (DOY 305) | 83 | 5, 11-18, 24, 53-56, 67-69, 73-75, 107-118, 121 |
| Nov 2, 2015 (DOY 306) | 10 26 99 115 131 147 163 179 195 211 227 | 11-13, 20-29, 32, 44-48, 53-65, 110-122 11-16, 21-49 11-25, 54-56, 61-84, 106-107, 122 11-37, 42-43, 48-66, 73-74, 77-80, 201-207, 213-218 11-41, 44-52, 56-58, 106-115 11-48, 53, 106-108, 122 11-44, 57-59, 68, 75-76, 109-114, 118-122, 223 12, 18-79, 109-122 11-57, 86, 108-122 48-49, 59, 104-122, 206-207 23-30, 31, 56-99, 108-122, 205-206 |
Please contact USGS Customer Services with any questions about this announcement.
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