Table 2 Variation in stand age, RapidEye reflectance and ratios, key environmental variables and key LiDAR metrics for the fitting (n = 433) and validation datasets (n = 60)

Stand age (years)

16.6

2.84–37.8

17.8

3.89–32.8

 Blue (band 1)

0.0736

0.058–0.122

0.0719

0.059–0.114

 Green (band 2)

0.0031

6 × 10⁻⁴–0.024

0.0029

8 × 10⁻⁴–0.013

 Red (band 3)

0.0373

0.024–0.123

0.0349

0.026–0.111

 Red edge (band 4)

0.0787

0.061–0.149

0.0768

0.058–0.136

 Near infrared (band 5)

0.235

0.156–0.366

0.235

0.180–0.329

 EVI

0.546

0.226–0.817

0.551

0.276–0.753

 NDVI

0.726

0.284–0.846

0.737

0.340–0.842

 RE

0.0065

0.002–0.045

0.0065

0.002–0.029

 SR

6.81

1.78–12.0

7.17

2.03–11.7

 GR

98.9

10.9–336

103

15.8–279

 VI

0.0814

0.020–0.324

0.0826

0.025–0.314

 Brightness

0.0855

0.066–0.134

0.0843

0.071–0.117

 Av. air temp. (°C)

11.2

9.27–14.1

11.2

9.86–13.7

 Av. spr. air temp. (°C)

10.5

8.47–13.0

10.6

9.01–12.6

 Av. rad. (MJ m² day⁻¹)

19.2

12.1–21.1

19.2

13.8–21.3

 Av. spr. rad. (MJ m² day⁻¹)

23.9

15.1–25.8

23.9

18.4–26.0

 Ann. rainfall (mm)

1420

1119–2216

1444

1158–2144

 Slope (degrees)

5.24

0–31.9

6.50

0–20.6

  P ₀₅ (m)

0.35

0.015–6.81

0.41

0.027–3.95

  P ₅₀ (m)

14.0

0.16–33.8

15.6

0.258–30.7

  P ₈₀ (m)

18.2

0.37–39.8

20.0

1.60–37.6

  P ₉₅ (m)

21.1

0.79–43.4

22.9

2.54–41.4