101 
ter s on 
sur f ac e 
•?c: t. r i c a 1 
e ci i. men t s 
:?fiti tted. 
all the 
ft ground 
3er soil 
«smooth surfaces (Fig.5,6)£of loamy sand decreases more rapidly with 
increasing moisture than £ of dry sand. With moisture values being 
lower than 10 wt>1 £ of loamy sand is less than £ of dry sand. 
) The measurement of the brightness temperature is significantly 
i n f 1 u e n c: e* d b y t h e s la r f a c e r o u g h n e 53 s« 7h i s i n flue n c e g r o w s 
exponentially with increasing water content. The more rougher the 
sur face is, the less the decline of C with increasing moisture 
content. Very rough surfaces change £ little or to put it in other 
words, t 
h e s la r f a c e e f f e c t i s s c r e e n e d b y 
t h e me 
ti st.ur 
e ef f 
ect.. 
. 8 
c m t o 
L . O 
about 
To 
sum up« 
t h e r e i s n «o w a y o f u n a m b i g o u s 
i n f er en 
c a ng 
one o 
ut of 
the 
h. 
At a 
t h r 
ee para 
meters (moisture, surface rough 
ness an 
id sub 
st r at 
e textu 
ire) 
or 
t wo 
f r OiTi s i n g .1 e 
values of the samples. More 
i n f or »7: 
¡at i on 
on t 
he last 
t wo 
omet er s 
par 
ameters 
is needed. 
1 ayer 
yj. ft uu. 
Measure 
ment of moisture in excavation m 
ater i a.l 
E> 
jUQ 
[hness 
?r i 
men ts 
For 
d emon «s 
t r a t i n g t h e p r a c t. i c a 1 la t i 1 i t y 
o f t h e 
' Ph Y 
s i c a I 
rel ati 
ons 
?en 
i t h e 
so 
far con 
si der ed i nvest i «g a11 orts on p 1 ei st 
oscene 
ex c av 
at i <ors 
materi 
al s 
wer 
e carri 
ed out at an open cast mine o 
f ligni 
t e i n 
the 
state 
of 
HH- E : 
■i vi ty 
B r a n d e n b u r q 
(Fast Germany). 
The 
mi cro 
wave radiometer designed and man 
LA f ert C t LA r 
ex:i by 
the 
Techni 
cal 
. on 
s c a r i 
Hig 
h SC h OO .1. 
of Ilmenau ( ^ ~ 3 cm) was egui 
pped wi 
t h a 
scann 
ing dev 
ice 
bi 
nd i ng 
... -J 
dTiO 
mounte 
d near the operator's cabin of 
an ex 
C ¿1V c : f . ti 
or ( 
F i g . 7 
) . 
t r 
acted 
Acc 
ording 
to the perpendicular scan and th 
e horis 
ontal 
movement of 
the 
content 
e>; c 
cd V* cri *t. O c?l 
f r a m e o f m e a s u r i n g s p o t s o f t h e 
actual 
e>; c a 
v a t i o n p 1 a n G’ 
has 
•pl 
etel y 
been set 
up similar to a '2—di men si on a 1 im 
age con 
sisti 
ng c« 
f a pi 
x el 
e 
on 1 y 
r as 
ter (Fig 
. 8 }. In every position T B was 
measur 
ed by 
the 
r adiomet 
er . 
?d i 
n g a 
The 
real ph 
ysi cal temperature of the excava 
tion bo 
q y w a 
s det 
er min ed 
by 
mi 
neral 
ci r * 
ad i omet e 
r pistol (Fa. Ray teak). The sc arm 
i ng of 
segue 
nt i al 
ex c a v a t 
i on 
' i g 
» o) . 
p« 1 a 
nes 1ead 
to a ¿(--«dimensional emissi vity model. At the 
same 
time ab 
out 
n 
Jtl »_.< 
soi1 sam 
pies per plane were taken and in 
vestiga 
ted i 
n the 
I aborat 
or y 
let 
ec t ed 
r eg 
a r d i n g 
their t e>; ture and soi-1 moi sture. 
For t 
he i n 
terpr 
etation 
of 
:St 
r ates 
the 
results 
the samples could be classified 
i r« to; 
e 
have 
* 
nd 
. For 
~ c 
at eg or y 
I wit h weak binding f orce (SF,SE 
, Sm) ,