8. To calculate profiles of total absorption coefficient and its constituents for one
fixed frequency in ranges 110–120 GHz with the program “Svcrad” and file of
aerological sounding data.
9. To calculate the spectral dependence of the clear absorption coefficient in
frequency ranges 110–120 GHz with step 0.5 GHz with the program “Svcrad”
for fixed altitude level.
3.4.5 Requirements to the Report
To prepare the brief report including elements of the theory, all results, and
conclusions.
3.4.6 Additional Formulas and Relations
1. G [ 1/km ] ¼ [ ln (10)/10 ] Â G [dB/km] ¼ 0.230259 Â G [dB/km].
2. The absorption coefficient within microwave interval might be calculated with
the Van-Fleck-Veiskon formula
G O 2 n i ; h j
À
Á ½1=kmŠ ¼ 1:2305
n
2
i p h j
À Á
T h j
À Á
Â
Ã
3
exp À4:14
1
T h j
À Á
!
Â
D n h j
À Á
n i À n O2
ð
Þ
2 þ Dn h j
À Á
Â
Ã2 þ
D n h j
À Á
n i þ n O2
ð
Þ
2 þ Dn h j
À Á
Â
Ã2
"
#
3. The following formula for calculation non resonance absorption by water vapor
in the spectral interval l ¼ 2.2–3.0 mm:
G H 2 O ½dB=kmŠ ¼ 1:73 Á 10
À3 r H 2 O h j
À Á T h j
À Á
300
! 5
2 p h j
À Á
760
1
l
2:4
;
where r H 2 O is the absolute humidity [g/m
3
];
l is the wavelength [cm];
p h j
À Á
is the pressure at the altitude P n ðuÞ ¼
1
Dn
R
D n
e
Àkn u dn; [mmHg]
38
3 The Direct Calculation of the Absorption Coefficient of Atmosphere Gases