April 16, 2015 - Landsat 8 Thermal Data Reprocessing Update

On March 6, 2015 we reported that the Landsat 8 Thermal Infrared Sensor (TIRS) resumed normal imaging operations, and outlined plans for reprocessing data acquired since December 19, 2014, when problems occurred in the A-side electronics of the sensor. Provisional TIRS data acquired since March 13, 2015 were expected to require reprocessing to refine the absolute calibration; however, based on a small number of vicarious measurements, it has been determined that these data will not need to be reprocessed for now since the radiometry appears to be consistent with the previous A-side data. The calibration will be monitored and updated in the future if needed.

Beginning April 30, 2015, Landsat 8 scenes acquired from December 19, 2014 to March 13, 2015 will be reprocessed to include valid TIRS data. The reprocessing effort is expected to complete by May 18, 2015. TIRS data for a number of scenes will not be processed due to non-nominal instrument configuration.

The table below includes the details of all Landsat 8 data acquired since December 19, 2014.

Acquisition Date Range

Sensor Imagery Acquired

Reprocessing Period

Nominal TIRS Data Product Availability

Notes

December 19, 2014 –
March 1, 2015 (23:57:34 UTC)

OLI & TIRS

April 30, 2015 -
May 18, 2015

May 18, 2015

The side-A data which is now unavailable will be made available with a reprocessing that will occur about April 30th, 2015

March 2, 2015 (13:53:23 UTC) - March 3, 2015 (00:40:35 UTC)

None

N/A

N/A

No TIRS or OLI imagery acquired due to TIRS side-swap activities

March 3, 2015 (00:40:35 UTC) - March 4, 2015 (00:02:18 UTC)

OLI

N/A

N/A

OLI-only imaging resumes

March 4, 2015 (00:02:18 UTC) - March 4, 2015 (16:20 UTC)

OLI & TIRS

N/A

N/A

Side-B TIRS engineering imagery acquired

March 4 (16:20:00 UTC) -
March 7 (00:00:00 UTC)

OLI & TIRS

April 30, 2015 -
May 18, 2015

May 18, 2015

Mode-4 without TIRS calibration parameters

March 7 (00:00:00 UTC) -
March 13, 2015

OLI & TIRS

April 30, 2015 -
May 18, 2015

May 18, 2015

Nominal TIRS  - includes regular blackbody and deep space calibration collects

March 13 -present

OLI & TIRS

N/A

N/A

Reprocessing not needed based on TIRS vicarious measurements