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Remote Sens Environ. 2016 Oct;185:7-15. doi: 10.1016/j.rse.2016.07.032. Epub 2016 Aug 2.

CONTINUOUS CALIBRATION IMPROVEMENT: LANDSAT 5 THROUGH LANDSAT 8.

Author information

1
Engineering-Office of Research, South Dakota State University (SDSU), Brookings, SD 57007, USA.
2
Science Systems and Applications, Inc., NASA/GSFC Code 618, Greenbelt, MD 20771, USA.
3
Biospheric Sciences Laboratory, Code 618, National Aeronautics and Space Administration Goddard Space Flight Centre (NASA/GSFC), Greenbelt, MD 20771, USA.

Abstract

Launched in February 2013, the Operational Land Imager (OLI) on-board Landsat 8 continues to perform exceedingly well and provides high science quality data globally. Several design enhancements have been made in the OLI instrument relative to prior Landsat instruments: pushbroom imaging which provides substantially improved Signal-to-Noise Ratio (SNR), spectral bandpasses refinement to avoid atmospheric absorption features, 12 bit data resolution to provide a larger dynamic range that limits the saturation level, a set of well-designed onboard calibrators to monitor the stability of the sensor. Some of these changes such as refinements in spectral bandpasses compared to earlier Landsats and well-designed on-board calibrator have a direct impact on the improved radiometric calibration performance of the instrument from both the stability of the response and the ability to track the changes. The on-board calibrator lamps and diffusers indicate that the instrument drift is generally less than 0.1% per year across the bands. The refined bandpasses of the OLI indicate that temporal uncertainty of better than 0.5% is possible when the instrument is trended over vicarious targets such as Pseudo Invariant Calibration Sites (PICS), a level of precision that was never achieved with the earlier Landsat instruments. The stability measurements indicated by on-board calibrators and PICS agree much better compared to the earlier Landsats, which is very encouraging and bodes well for the future Landsat missions too.

KEYWORDS:

Enhanced Thematic Mapper Plus (ETM+); Landsat; Operation Land Imager (OLI); Thematic Mapper (TM); radiometric calibration

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