Delta-T Devices SunScan SS1 User Manual page 58

This was again calculated numerically and curves fitted to the data with
similar accuracy as above. The curves fitted are:
Given:
 spher (
Diffuse light transmission (hemispherical response
sensor)
Transmission
fraction
Leaf Angle Distribution

spher (
Vertical

spher (
Spherical

spher (
Horizontal
58  LAI theory
P( ) x 1
Q( ) x 0.255atan( ) x
R( ) x exp(
, x L ) exp P( ) x L
1
0.1
, 0 L )
, 1 L )
1000 L , )
0.01
0.001
0
Leaf Area Index
. .
0.4 exp( 0.1 x (
.
0.6
) x
Q( ) x
. .
R( ) x ln(
Vertical
Horizontal
2 4
L
. .
) atan( 0.9 x )
1 L )
Spherical
6 8
SS1 User Manual v3.3
0.95 )
10