256
C. Simmer
C'1 1.4
S
Deirmendjian. C.
"' "'
o T = 263 K
tl.O 1.2
~
o T = 273 K
"' "'
T = 283 K
S
o T = 293 K
,.:,:: 1.0 '« Ci (Ulaby) T = 263 K
"' "'
...... 0.8
s:1
Q)
:§ ..... 0.6
.....
Q)
0 0.4
,.:,::
(Jl
s:1
0 0.2
:;::l
,.:,::
s:1
:;::l 0.0 0
~
40
60
80
100
I'Ll
Frequency [GHz]
Figure 11.5: Mass extinction coefficient for a C.l cloud at different temperatures. The mass
extinction coefficient of a cirrus cloud is shown for comparison.
.3.0
,..-,
~
n
E
"' "'
()'l
2.0
'-.../
"' "'
E
~
"' "'
~
'---'
1.0
+ 1 mm/h
• 5 mm/h
o 10 mm/h
x 50 mm/h
Rayleigh
20
40
FREQUENZ
60
[GHz]
80
100
Figur~ 11.6: Mass extinction and absorption coefficient for different rain rates using the
dropsize distribution by Willis {1984J compared to the mass extinction coefficient of a cloud.