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8 September 2015 Radiometric calibration and stability of the Landsat-8 Operational Land Imager (OLI)
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Landsat-8 and its two Earth imaging sensors, the Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) have been operating on-orbit for 2 1/2 years. The OLI radiometric calibration, which is monitored using on-board lamps, on-board solar diffusers, the moon and vicarious calibration techniques has been stable to within 1% over this period of time. The Coastal Aerosol band, band 1, shows the largest change at about 1% over the period; all other bands have shown no significant trend. OLI bands 1- 4 show small discontinuities in response (+0.1% to 0.2%) beginning about 7 months after launch and continuing for about 1 month associated with a power cycling of the instrument, though the origin of the recovery is unclear. To date these small changes have not been compensated for, but this will change with a reprocessing campaign that is currently scheduled for Fall 2015. The calibration parameter files (each typically covering a 3 month period) will be updated for these observed gain changes. A fitted response to an adjusted average of the lamps, solar and lunar results will represent the trend, sampled at the rate of one value per CPF.
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Brian L. Markham, Julia A. Barsi, Edward Kaita, Lawrence Ong, Ron A. Morfitt, and Md. Obaidul Haque "Radiometric calibration and stability of the Landsat-8 Operational Land Imager (OLI)", Proc. SPIE 9607, Earth Observing Systems XX, 96070N (8 September 2015);

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