118 
5.» Conclusions 
During the INTERCOSMOS-experiments for microwave measurements only 
a passive 3-cm radiometer could be used. The expected difficulties 
in determining soil moisture parameters because of the strong 
influence of the green vegetation in this given waveband were 
found. In general, the only 3-cm radiometer is not very suitable 
for soil moisture detection. Nevertheless the derivation of plant 
moisture and soil moisture parameters is possible in some special 
cases. Relative changes could be detected by repeated measurements 
within a time interval of 5 - 10 days. In some special cases ■ 
degree of soil coverage by plants easily can be measured with 
microwave radiometer in the 3-cm waveband. Fi 
investigations asa minimum a second radiometer ii 
waveband isnecessary, which is less influenced 
plants. 
eat 
ed m 
e 
asur 
ements 
sp 
ec ia 
1 
c 
as 
es 
the 
me 
asur 
e 
d 
w 
i th 
a 
Fo 
r q 
u 
an 
t i 
tat 
ive 
in 
th 
e 
20 
-30 
-cm 
ed 
by 
th 
e 
vi 
tal