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APPLICABILITY OF AIRBORNE PROFILING RADAR TO FOREST INVENTORY

机译:机载雷达在森林调查中的适用性

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In this work the applicability of airborne profiling radar to forest inventory was studied in detail. The radar stand profiles were collected by using a helicopter-borne ranging scatterometer, HUTSCAT (Helsinki University of Technology SCATterometer), which can probe the forest canopy from the top to the bottom due to its ranging capability. Several radar variables were analyzed from stand profiles, and compared with field-measured characteristics of 20 m by 20 m sample plots, by applying multivariate data analysis methods. It was shown that mean and dominant height, height of the crown base line, and stem volume per hectare can be obtained with good accuracy. Furthermore, the ranging radar can measure mean and dominant tree heights more accurately than is usually obtained with conventional field measurements. As possible direct application, it is proposed that radar measurements would be employed with helicopter-borne ocular inventories in order to improve the estimation accuracy and to speed up the measurements. [References: 36]
机译:在这项工作中,详细研究了机载轮廓雷达在森林资源调查中的适用性。使用直升飞机测距散射仪HUTSCAT(赫尔辛基工业大学SCATterometer)收集雷达站剖面,由于其测距能力,它可以从顶部到底部探测林冠层。通过使用多变量数据分析方法,从林分剖面分析了几个雷达变量,并与20 m x 20 m样地的实地测量特征进行了比较。结果表明,均值和优势高度,冠基线的高度以及每公顷茎的体积都可以得到很好的精度。此外,测距雷达比常规野外测量通常可以更准确地测量平均树高和优势树高。作为可能的直接应用,建议将雷达测量与直升机载的眼动清单配合使用,以提高估计精度并加快测量速度。 [参考:36]

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