Synergistic use of very high-frequency radar and discrete-return lidar for estimating biomass in temperate hardwood and mixed forests

Table 3 Metrics derived from PALS

PALS metric	Description
h_a, h_c	Mean height, all hits and canopy hits
std_al, std_c	Standard deviation, all hits and canopy hits
sk_al, sk_c	Skewness, all hits and canopy hits
k_al, k_c	Kurtosis, all hits and canopy hits
h_qal, h_qc	Quadratic mean canopy height, all hits and canopy hits
p₁₀, p₂₀, …p₁₀₀	Percentile heights, all hits
p_c10, p_c20, …p_c100	Percentile heights, canopy hits

Similar set of metrics were developed for height derived from first, second, third, and all returns of scanning lidar. A canopy hit is a pulse with a height ≥ 3 m

ISSN: 1297-966X