Skip to main content

Table 9 The list of variables derived from Sentinel-1 data

From: Improved estimation of aboveground biomass of regional coniferous forests integrating UAV-LiDAR strip data, Sentinel-1 and Sentinel-2 imageries

Variable group

Type (number)

Variable

Definition

c

Backscatter (3)

VV

Backscatter coefficient of VV

VH

Backscatter coefficient of VH

VH/VV

Ratio of VH to VV

Spatial texture (16)

VH_mean, VV_mean

Mean

VH_ent, VV_ent

Entropy

VH_con, VV_con

Contrast

VH_dis, VV_dis

Dissimilarity

VH_var, VV_var

Variance

VH_cor, VV_cor

Correlation

VH_hom, VV_hom

Homogeneity

VH_asm, VV_asm

Angular second moment

d

Multi-scale WT texture of Sentinel-1 (24)

a_m_Bn_sar

Approximate texture

h_m_Bn_sar

Horizontal texture

v_m_Bn_sar

Vertical texture

d_m_Bn_sar

Diagonal texture

  1. Note: m represents the level of wavelet decomposition, from 1 to 3. n = 1 or 2, B1 represents the VH channel, B2 represents the VV channel