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This letter presents a novel technique to calculate temperatures of buildingrooftops and other impervious surfaces from high spatial resolution aerialthermal images. In this study, we collected aerial radiance images of 30cmspatial resolution using a FLIR Phoenix imager in long-wave and mid-waveinfrared wavelengths for the city of Cedar Falls, USA to estimate building rooftemperature loss. Simultaneous ground temperature measurements were made atpre-selected ground targets and roofs using 9 Fluke 561r infrared thermometers.Atmospheric correction of aerial images was performed by Empirical LineCalibration (ELC) method. The resulting ground-leaving radiances were correctedfor the emissivity of different roof types and the true kinetic temperature ofthe building roofs was calculated. The ELC model was observed to perform betterwhen only impervious surface targets were used for the regression. With anR2=0.71 for ELC, the method produced a root mean squared error of 0.74{\deg}Cfor asphalt roofs. Further, we observed that the microclimate plays asignificant role while synchronizing aerial and ground measurements.

Estimation of Building Rooftop Temperature from High Spatial Resolution Aerial Thermal Images