Landsat 8 OLI and TIRS Calibration Updates and Trends for the Period of 4 Years of Operation

Landsat 8 had been in orbit and operational for more than 4 years which brings it to the milestone of passing 80% of the official design lifetime for its Operational Land Imager (OLI) payload and past the full lifetime for the Thermal Infrared Sensor (TIRS) payload. This paper will report about the status of the operational payloads, highlighting trends and stability of the absolute and relative radiometric response. It will also describe the status of other core performance parameters such as SNR, NEdT, uniformity, highlighting how calibration updates made in the USGS data processing system to maintain and enhance the quality of the data helped in reducing uncertainties, overcoming hardware anomalies. For OLI we will present the trends for its on-board calibration components and for TIRS we will demonstrate how application of stray light correction implemented since the new Collection 1 release can assist in tightening the TIRS band 10 radiometric products accuracy.