User manual

Code: ENIGMA III User Manual
Edition: 1 Revision: 4
Date: 19/12/2008
Page: 64/97
6.18 gasAttenuation
Gaseous attenuation constant. a*r is the gaseous attenuation. 'r' is the range in km, 'a' is an attenuation
factor. It can be set by parameter 'gasAttenuation'. Parameter 'RangeNorm' enables/disables range
correction.
Type: float
Default: 0.0
Unit: dB/km
6.19 CCORThreshold
Negative value in dB for CCOR thresholding.
Type: float
Default: -10.0
Unit: dB
6.20 SQIThreshold
Positive value in the range [0,1]
Type: float
Default: 0.0
6.21 Rain attenuation correction
A
R
is the rain attenuation correction. The value depends on the previous bin value.
A
Rn
=a⋅A
−
b
B
⋅ r⋅10
Z
n−1
⋅b
10⋅B
a, b, A, B are constants stored in parameters RainAttenuation_a, RainAttenuation_b, RainAttenuation_A,
RainAttenuation_B.
r
is the range step.
Z
n-1
is a reflectivity for the previous bin, that is sampled from the same ray on the smaller range.
6.21.1 RainAttenuation
This parameter switches on/off rain attenuation correction";
Type: boolean
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