Ground LST measurements in the Barrax test site for the assessment of the SBAC atmospheric correction technique applied to Landsat 8-TIRS

Joan M. Galve; Juan M. Sánchez; Julio Villodre; José González-Piqueras; César Coll; Alfonso Calera

doi:10.1117/12.2533444

27 June 2019 Ground LST measurements in the Barrax test site for the assessment of the SBAC atmospheric correction technique applied to Landsat 8-TIRS

Joan M. Galve, Juan M. Sánchez, Julio Villodre, José González-Piqueras, César Coll, Alfonso Calera

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Proceedings Volume 11174, Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019); 1117411 (2019) https://doi.org/10.1117/12.2533444
Event: Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019), 2019, Paphos, Cyprus

Abstract

Monitoring Land Surface Temperature (LST) from satellite remote sensing plays a key role in climatic, environmental, hydrological and agricultural applications. A Single Band Atmospheric Correction (SBAC) tool was recently introduced and tested with Landsat 7/ETM+. SBAC provides pixel-by-pixel atmospheric correction parameters regardless of the pixel size using atmospheric profiles from National Centers of Environmental Prediction (NCEP) reanalysis products as inputs, accounting also for the pixel elevation through a Digital Elevation Model (DEM). This work deals now with the assessment of SBAC applied to Landsat 8/TIRS data since no operational LST product is still available. A new experiment was conducted in summer 2018, covering a variety of crops and surface conditions in the Barrax test site, Spain (39º 03’ N, 2º 06’ W) concurrent to L8/TIRS overpasses. Ground temperatures were measured using a set of hand-held infrared radiometers (IRTs) Apogee MI-210. Results show differences within ±3.5 K for all cases. Average results for SBAC show small bias (- 0.8K) and standard deviation (±1.3 K), yielding a RMSE of ±1.5 K. Finally, a comparison is established with results obtained using the NASA Atmospheric Correction Parameter Calculator tool (ACP) applied to the center of ”Las Tiesas” site coordinates. A similar standard deviation (±1.4 K) was obtained, with a larger bias, close to -1.5 K in this case, and a resulting RMSE of ±2.0 K. These results reinforce the potential of SBAC for the operational pixel-by-pixel atmospheric correction of full Landsat 8/TIRS images.

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Joan M. Galve, Juan M. Sánchez, Julio Villodre, José González-Piqueras, César Coll, and Alfonso Calera "Ground LST measurements in the Barrax test site for the assessment of the SBAC atmospheric correction technique applied to Landsat 8-TIRS", Proc. SPIE 11174, Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019), 1117411 (27 June 2019); https://doi.org/10.1117/12.2533444

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KEYWORDS

Atmospheric corrections

Earth observing sensors

Landsat

Radiometry

Temperature metrology

Atmospheric modeling

Satellites

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