TIRS

As of February 10, 2016, many of the scenes acquired from October to December 2015 have been reprocessed into nominal Level-1 products containing valid Thermal Infrared Sensor (TIRS) data and are available for download. The generation of Landsat 8 surface reflectance products from these data will become available within the next week. A message will be posted on the EPSA on-demand interface when higher level processing is available for these scenes. (Read More)

The Landsat 8 Thermal Infrared Sensor (TIRS) Scene Select Mirror (SSM) encoder electronics anomaly investigation continues. In the meantime, Landsat 8 Level-1 products will continue to be made available consisting of valid data for the OLI solar reflective bands but with zero-fill data for the TIRS bands until corrections can be released in early 2016. (Read More)

The Landsat 8 Flight Operations Team is monitoring an increasing trend in the Thermal Infrared Sensor (TIRS) B-Side Encoder Electronics current. This condition is similar to the previous observations made on the Encoder A-Side electronics during the fall of 2014. (Read More)

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. (Read More)

The Landsat 8 Thermal Infrared Sensor (TIRS) resumed normal imaging operations on March 4, 2015, and nominal blackbody and deep space calibration data collection will resume on March 7, 2015. (Read More)

The Landsat 8 satellite continues to acquire data from both onboard sensors, however Level-1 processing of Thermal Infrared Sensor (TIRS) data remains suspended – TIRS data bands currently consist of only zero-fill. (Read More)

Landsat 8 continues to acquire OLI and TIRS data, although TIRS Level-1 processing remains suspended.

On December 19 the TIRS instrument on Landsat 8 was reconfigured due to detection of anomalous current levels associated with the scene select mirror encoder electronics. (Read More)

Landsat 8 Level-1 data products continue to be generated and contain valid Operational Land Imager (OLI) data; however the Thermal Infrared Sensor (TIRS) band data will consist of zero-fill and will be unusable at this time. Details on the TIRS data can be found in the December 19 and December 22, 2014 Headlines. This will be the standard Landsat 8 product content until further notice.

At 10:34 am (CST) the configuration of the TIRS instrument on Landsat 8 was reconfigured due to detection of anomalous current levels associated with the scene select mirror encoder electronics. (Read More)