落雨效應 Rainfall effect(雨衰Rain Attenuation)   

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頻率  1 GHz. 10 GHz. 30 GHz.
雨量 (mm/hr.)  衰減量(dB/Km) 衰減量(dB/Km) 衰減量(dB/Km)

10

.0001

.1891

2.0204

20

.0001

.4286

4.2565

30

.0002

.6916

6.5819

40

.0002

.9712

8.9673

50

.0002

1.2638

11.3983

60

.0002

1.5672

13.8663

70

.0002

1.8798

16.3655

80

.0002

2.2006

18.8916

90

.0002

2.5288

21.4417

100

.0002

2.8635

24.0131