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|Title:||Ultra low level aircraft (ULLA) as a platform for active optical sensing of crop biomass||Contributor(s):||Lamb, David (author); Trotter, Mark (author); Schneider, Derek (author)||Publication Date:||2010||Handle Link:||https://hdl.handle.net/1959.11/10558||Abstract:||Crop producers requiring crop biomass maps to support timely application of in-season fertilisers, pesticides or growth regulators rely on either on-ground active sensors or airborne/satellite imagery. Active crop sensing (for example using Yara N-Sensor™, Greenseeker™ or CropCircle™) can only be used when the crop is accessible by person of vehicle, and extensive, high-resolution coverage is time consuming. On the other hand, airborne or satellite imaging is often hampered by cloud, either in the sensor-image path or by associated non-uniform illumination of ground targets. We have combined the desirable attributes of active optical sensing with the fast, synoptic coverage afforded by aircraft platforms. An ultra low-level aircraft (ULLA) system carrying an active NIR/Red CropCircle™ sensor was successfully deployed at an altitude of 3-5 m over a 270 Ha field of skip-row sorghum ('Sorghum bicolor') to measure and map crop vigour via the simple ratio (SR) index.||Publication Type:||Conference Publication||Conference Name:||10th International Conference on Precision Agriculture (ICPA), Denver, United States of America, 18th - 21st July, 2010||Source of Publication:||10th ICPA Proceedings||Publisher:||ICPA||Place of Publication:||online||Field of Research (FOR):||070104 Agricultural Spatial Analysis and Modelling||HERDC Category Description:||E2 Non-Refereed Scholarly Conference Publication||Statistics to Oct 2018:||Visitors: 277
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