SWI
140
TM (B3-B4)
120
,(PVI)
N VY 1-0407x £ 140.6
100 "d So
SA e a. 8:
> Ful 9 À
e Vegetation "« Dry Bare
S 8 Coverage N Soil
SD N. N
a Y
c) (SWI) Soil Wetness Index (SWI)
y = 0.9609x - 10.225 SWI= -x - 0.9609y + 20)
Wet B
10 s Mi vs Perpendicular
Cd Vegetation Index (PVI)
£F PVI= y - 0.9609x + 20
20
20 40 60 80 100 120 140
B3-COUNT(x)
Fig.2 Soil wetness index (SWI) and perpendicular vegetation index (PVI)
derived from Landsat TM data acquired on April 29th, 1993.
120
JERS-1/SAR-TM:SWI
100 | > >
80
60 =
40 .
2 y = 5.2676x + 131.7
; V 0. 2/42
0 : s
-20 -18 -16 -14 -12 -10 -8 -6
SAR-NRCS(dB)
Fig.3 Result of the regression analysis between
SAR backscatter (NRCS) and SWI.
686
80
70 F
60 r
50 |
40
30 r
20
JERS-1/SAR-TM: PVI
ÿ = 6.5908x + 123.52
Ré = 0.3881
-14 -12 -10
SAR-NRCS(dB)
Fig.4 Result of the regression analysis between
SAR backscatter (NRCS) and PVI.
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996