162
Spaceborne Synthetic Aperture Radar Remote Sensing
162
,
, and
are almost unchanged, while
is
, which leads to an increase in
of about 7dB.
Although some plantselements (i.e., leaves) are present in the eld, a non- negligible odd- bounce
scattering is observed, driven by the wind- induced roughness on the underlying water layer. Then,
on 9 July, although the eld is in the middle of tillering (BBCH 25), odd- bounce dominates the radar
response, with
(
) being around 30° (– 5dB). Nonetheless,
,
, and
increased substantially
of about 10dB, 12dB, and 20dB, respectively. This denotes that, at this stage, the double- bounce
between the water and the tillers, the volume scattering from the tillers, and, nally, asymmetric ...