129
c 'Robusta '
[ i j i !
I
1 LAYER 2
(f)
m lay-
corres-
subs tantial
Lar stands
tory. In L-band
ickscattering
f the poplar
requency. As
rom the lower
ience angle,
i be influenced
tailed infor-
)e modified,
sed and the
id.
parameters
3 , can simpli-
Lllus trated
E the cloud
rough inversion
Level model.
Eul tool in the
if forests. In
Led for each
i calculation
le model is not
ross errors may
Figure 10. Simulated radar returns from a poplar 'Robusta' stand based on the multi-level model shown
as a function of range distance. In sub a and b the returns are compared for the C-band, 16.5 degrees
incidence angle and an altitude of 323 meters where respectively the level spacing is kept at 9 meter and
in the second case the level spacing is ignored. In sub c and d the simulation is repeated for an altitude
of 1800 meter.
No. 2, pp. 357-364, March-April 1978.
Attema, E.P.W. and P. Snoeij, 1985, DUTSCAT,
a 6-frequency airborne scatterometer, Proceedings
EARSeL Workshop 'Microwave remote sensing applied
to vegetation', Amsterdam, 10-12 December 1984,
ESA SP-227, January 1985, pp. 127-129.
Hoekman, D.H., L. Krul and E.P.W. Attema, 1982,
A multilayer model for radar backscattering from
vegetation canopies, Proc.Int.Geoscience and
Remote Sensing Symp., Munich 1-4 June 1982,
Vol. 2, TA-1, pp. 4.1-4.7.
Hoekman, D.H., 1986, Experiments on modelling radar
backscatter of forest stands and research on
classification, Proceedings 3-rd International
Colloquium on Spectral signatures of objects in
remote sensing, Les Arcs, 16-20 Dec. 1985, ESA
SP-247, pp. 127-132.
Ulaby, F.T., R.K. Moore and A.K. Fung, 1982,
Microwave remote sensing, Vol. II, Reading, MA,
Addison-Wesley, p. 573.
the support of
acial support
the Netherlands
Vegetation
Len.ce, Vol. 13,
