J. Hyyppa et M. Hallikainen, A HELICOPTER-BORNE 8-CHANNEL RANGING SCATTEROMETER FOR REMOTE-SENSING.2. FOREST INVENTORY, IEEE transactions on geoscience and remote sensing, 31(1), 1993, pp. 170-179
Forest inventory methods based on data acquired with an airborne rangi
ng radar are discussed. The approach can be used to partly automate pr
esent labor-dominated forest inventory methods. Using these methods, t
he mean and dominant tree height can be measured with a standard devia
tion of 1 m. The stem volume per hectare can be estimated with a relat
ive accuracy of 15% by effectively counting the height distribution of
the trees and by calculating the center of backscattered power from t
he forest canopy profile for a stand with a diameter of 40 m. The meth
ods have been developed using a helicopter-borne eight-channel ranging
scatterometer HUTSCAT (Helsinki University of Technology SCATteromete
r) which can measure a radar forest canopy profile (FCP) with a range
resolution of 65 cm.