Landsat Missions

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January 6, 2014 - Landsat 8 Reprocessing Details

Beginning February 3, 2014, all Landsat 8 data held in the USGS archives will be reprocessed. All Landsat 8 scenes will be removed from the online cache at this time and the data will then be reprocessed starting with the most recent acquisitions and proceeding back to the beginning of the mission. (Read More)

November 14, 2013 - Landsat 8 Reprocessing Rescheduled

The previously-planned reprocessing effort of all Landsat 8 data in the USGS archive will begin in early 2014. During this time, all Landsat 8 data held in the USGS archive will be purged and reprocessed using updated calibration parameters for both OLI and TIRS data.

Details about the changes to the data are available in the November 14, 2013 Calibration Notice.   

October 28, 2013 - Upcoming Landsat 8 Reprocessing

Within the upcoming weeks, all Landsat 8 data held in the USGS archive will be reprocessed using updated calibration parameters for OLI and TIRS data. During this time, all online products will be purged and the online inventory will be re-populated. Details about the changes to the data are available in the October 25, 2013 Calibration Notice.

September 27, 2013 - Landsat 7 Thermal Band Calibration Update

Effective October 1, 2013, the calibration of the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Band 6 will be updated to correct a bias error that has been present in all thermal data since the last calibration update in 2010. Vicarious calibration teams detected a bias error of 0.036 watts per square meter steradian micron  (W/(m2 sr µm)) that causes overestimation of top-of-atmosphere temperatures by approximately 0.26 Kelvin (K) at 300K. Calibration parameters within the Calibration Parameter File (CPF) have been adjusted to correct for this bias error. (Read More)

September 27, 2013 - CPF update for Offset Following Safehold

On September 19, 2013 (DOY 262) at approximately 20:08 UTC, Landsat 8 experienced an unplanned transition to safe hold following an attitude control anomaly. Precision attitude control was recovered and imaging operations resumed on day of year 264 (September 21, 2013). (Read More)

October 26, 2012 - Landsat 5 Thermal band 6 issues

Issues have been identified with thermal band 6 of Landsat Thematic Mapper processed data, due to the Calibration Parameter File (CPF) updates implemented on October 1, 2012. We are working to resolve this issue as quickly as possible. Please Contact Us with any questions or concerns about this.

September 28, 2012 - Landsat releases quarterly Calibration Parameter File

Once a quarter, the radiometry experts on the Landsat team craft a new Calibration Parameter File (CPF), which is then incorporated into processing new and archived data. For Landsat 5 TM products created on or after 1 October, the update will improve radiometric accuracy and will significantly reduce or eliminate residual banding and striping. See the Calibration Notices webpage for more information.

January 28, 2010 - Calibration update to ETM+ thermal band

Effective January 1, 2010, the calibration of the ETM+ thermal band was modified to correct for a lifetime gain error detected by the vicarious calibration teams. Changes were made to the Calibration Parameter File (CPF) to correct a gain error that has been present since the launch of the instrument. (Read More)

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Landsat represents the world's longest continuously acquired collection of space-based moderate-resolution land remote sensing data. Four decades of imagery provides a unique resource for those who work in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Landsat images are also invaluable for emergency response and disaster relief.

 

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Landsat Updates

The Landsat Update is an informal communication tool, prepared periodically and distributed electronically to USGS Landsat partners, to provide information about Landsat activities and related topics of interest.

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