Thermal remote sensing in the framework of the SEN2FLEX project: field measurements, airborne data and applicationsReport as inadecuate




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A description of thermal radiometric field measurements carried out in theframework of the European project SENtinel-2 and Fluorescence ExperimentSEN2FLEX is presented. The field campaign was developed in the region ofBarrax Spain during June and July 2005. The purpose of the thermalmeasurements was to retrieve biogeophysical parameters such as land surfaceemissivity LSE and temperature LST to validate airborne-based methodologiesand to characterize different surfaces. Thermal measurements were carriedout using two multiband field radiometers and several broadband fieldradiometers, pointing at different targets. High-resolution images acquired withthe Airborne Hyperspectral Scanner AHS sensor were used to retrieve LST andLSE, applying the Temperature and Emissivity Separation TES algorithm aswell as single-channel SC and two-channel TC methods. To this purpose, 10AHS thermal infrared TIR bands 8–13 mm were considered. LST and LSEestimations derived from AHS data were used to obtain heat fluxes andevapotranspiration ET as an application of thermal remote sensing in thecontext of agriculture and water management. To this end, an energy balanceequation was solved using the evaporative fraction concept involved in theSimplified Surface Energy Balance Index S-SEBI model. The test of thedifferent algorithms and methods against ground-based measurements showed root mean square errors RMSE lower than 1.8K for temperature and lowerthan 1.1 mm-day for daily ET.



Author: Sobrino, J. A.; - Jiménez Muñoz, J. C.; - Soria, G.; - Gómez, M.; - Barella Ortiz, A.; - Romaguera, M.; - Zaragoza, M.; - Mora

Source: http://repositorio.uchile.cl/



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