Abstract

Tree inspection is conducted to assess the risk of tree collapse and to maintain the safety. We have been using radar to non-invasively image the inside structure of tree trunk for the inspection. We established an efficient way of inspecting trees with radar. The first step employs the transmission measurements with one or two transmitter positions for the quick detection of decay and screening, and the second step uses reflection measurements for imaging and detailed inspection. The paper illustrates our strategy of the tree trunk inspection by radar and presents some measurement examples.

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