Combination active optical and passive thermal infrared sensor for low-level airborne crop sensing |
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Authors: | D W Lamb D A Schneider J N Stanley |
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Institution: | 1. Cooperative Research Centre for Spatial Information and Precision Agriculture Research Group, University of New England, Armidale, NSW, 2351, Australia
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Abstract: | An integrated active optical, and passive thermal infrared sensing system was deployed on a low-level aircraft (50 m AGL) to record and map the simple ratio (SR) index and canopy temperature of a 230 ha cotton field. The SR map was found to closely resemble that created by a RapidEye satellite image, and the canopy temperature map yielded values consistent with on-ground measurements. The fact that both the SR and temperature measurements were spatially coincident facilitated the rapid and convenient generation of a direct correlation plot between the two parameters. The scatterplot exhibited the typical reflectance index-temperature profile generated by previous workers using complex analytical techniques and satellite imagery. This sensor offers a convenient and viable alternative to other forms of optical and thermal remote sensing for those interested in plant and soil moisture investigations using the ‘reflectance index-temperature’ space concept. |
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