Figure 6-4 Dual Return with Far Retro-Reflector
The dual return function is often used in forestry applications where measurement of the height of trees is desired.
Figure
6-5 on the next page
indicates a sample response when the laser pulse initially hits the upper canopy, penetrates it, and
eventually hits the ground, producing multiple returns. Which laser return mode would be best in this situation?
Chapter 6 • Key Features 35
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