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Thermal cameras are designed to detect thermal emission in the mid‐infrared range (Prakash, 2000). They are commonly used for temperature measurement in vegetation studies (Berni et al., 2009), environmental applications (Zarco‐Tejada et al., 2012), and real‐time detection of objects. Given the low flying height of UAS, the products can have a much higher spatial resolution and negligible atmospheric influence. However, UAS‐based thermal cameras usually do not have cooled detectors because of their size, which can lead to low sensitivity and capture rates (Yao et al., 2019).