Furuno WR-2100 Installation Manual page 40

Zdr, Kdp+Zh method
1. Calculate corrected reflectivity difference ������
method")
2. Calculate rainfall intensity R from ������
elevation correction setting of RainMap.
Rain ( ������
Rain ( ������ , Kdp ) = ( 26.0 + 4.33 × 10
��������
0.883 (−0.0988−2.64×10
× Kdp × 10
Kdp+Zh method
1. Calculate rainfall intensity R from Kdp. This calculation will be selected by the elevation
correction setting of RainMap.
2. Calculate the rainfall intensity R from "Kdp" or from "Zh". This will be selected by thresholds
setting of RainMap.
Rain ( Kdp ) = c × (a + 2.64 × 10
3. Where, the parameters a,b and c are able to set by maintenance interface. Default values are
19.6, 0.825 and 1.2, respectively.
4. Where, the parameters th ( Kdp ) and th ( Zh ) are able to set by maintenance interface. Default
values are 0.3 [deg/km], and 30 [dBZ], respectively.
and Kdp. This calculation will be selected by the
��������
, Kdp ) = 26.0 × Kdp
��������
−2
−4 −6
×����−7.50×10 ×����
Rain ( Kdp ) = c × a × Kdp
−2
× ���� + 1.73 × 10
(eq.6)
Rain ( Kdp )
rainfall intensity R = {
Rain ( Zh )
34
[dB] from Adp and Zdr (see "Zh and Zdr
��������
0.883 −0.0988×������
× 10
��������
−3
× ���� + 2.28 × 10 × ����
2 −6 3
+1.06×10 ×���� )×������
��������
b
(eq.5)
−3 2
× ���� + 1.09 × 10
Kdp > th ( Kdp )
Zh > th ( Zh )
other
SSE-14-0023_17
(eq.3)
2 −4 3
)
+ 1.77 × 10 × ����
(eq.4)
−4 3 b
× ���� ) × Kdp