Furuno WR-2100 Installation Manual page 39

Zh, Kr decay correction method
1. Calculate rainfall intensity ��
described.
2. Calculate attenuation correction parameter Kr(r) from ��
3. Calculate rainfall intensity R from Zh+Kr
4. Cut lower data than threshold
Zh, Ah decay correction method
1. Calculate ��ℎ
from Zh and Ah
��������
2. Where, the parameters b1, b2 and range bin data resolution ∆r are able to set by
maintenance interface. Default values are 0.233, 1.020 and 0.1 [km], respectively.
3. Calculate rainfall intensity R from ��ℎ
described.
Zh, Zdr method
1. Calculate attenuation within precipitation area Adp [dB/km] , from Kdp
2. Where, the parameters d1 and d2 are able to set by maintenance interface. Default values are
0.0298 and 1.293, respectively.
3. Calculate corrected reflectivity difference ������
4. Where, the parameter ∆r is able to set by maintenance interface. Default value is 100 [m].
5. Calculate corrected reflectivity ��ℎ
6. Calculate rainfall intensity R from ������
elevation correction setting of RainMap.
Rain ( ��ℎ
Rain ( ��ℎ
, ������
�������� ��������
(0.0869−1.10×10
× 10
7. Where, el is elevation angle in degrees. The value of the el is limited within 0 ≤ el ≤ 90.
from Zh using same method of "Zh method" previously
��ℎ
�� = (
��ℎ
Kr(r) = 0.013 × ∫ ��
Rain ( Zh + Kr ) = (
Ah ( i ) = b1 × Kdp ( i )
Zh (i) = Zh(i) + 2 × ∑ Ah ( i )
corr
��������
Rain ( ��ℎ ) = (
��������
Adp ( i ) = d1 × Kdp ( i )
Zdr (i) = Zdr(i) + 2 × ∑ Adp ( i )
corr
[dB] from Ah and Zh (see "Zh and Ah method")
��������
��������
) = 0.013 × 10
, ������
�������� ��������
) = ( 0.013 − 5.69 × 10
−5
×����)×��ℎ +(−0.429−7.95×10
��������
33
1
1 Zh
β
) × 10 10×β
B
��ℎ
r
1.15
dr
��ℎ
0
1
Zh+Kr
1
β
) × 10 10×β
B
b2
i
∆r
×
1000
i=0
using same method of "Zh method" previously
1
1 ��ℎ
β
��������
) × 10 10×β
B
d2
[dB] from Adp and Zdr
��������
i
∆r
×
1000
i=0
and ��ℎ
. This calculation will be selected by the
��������
0.0869×��ℎ −0.429×������
��������
−8 −7
× ���� + 5.04 × 10 × ����
−4 −5 2
×����−2.25×10 ×���� −3.20×10
SSE-14-0023_17
(eq.1)
��������
2 −9 3
− 3.18 × 10 × ����
−6 3
���� )������
(eq.2)
��������
)