Applicability of airborne profiling radar to forest inventory
Applicability of airborne profiling radar to forest inventory
复制标题
机载剖面雷达在森林清查中的适用性
DOI：
10.1016/0034-4257(95)00254-5
复制
发表时间：
1996
影响因子：
13.5
通讯作者：
M. Hallikainen
中科院分区：
文献类型：
--
作者：
J. Hyyppä;M. Hallikainen
本文对机载剖面雷达在森林清查中的适用性进行了详细的研究。利用直升机载测距散射计HUTSCAT（赫尔辛基工业大学散射计）收集雷达站廓线，由于其测距能力，可以从顶部到底部探测森林冠层。利用多变量数据分析方法，分析了林分剖面的多个雷达变量，并与20 m × 20 m样地的实测特征进行了比较。结果表明，平均高度和优势高度、冠基线高度和每公顷茎体积的计算精度较高。此外，测距雷达可以比常规野外测量更准确地测量平均树高和优势树高。在可能的直接应用中，建议将雷达测量与直升机机载目视测量一起使用，以提高估计精度和加快测量速度。
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 heights, 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.