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Questions and Answers
What is the formula to calculate total attenuation from rain?
What is the formula to calculate total attenuation from rain?
- $A = \alpha + L$
- $A = \alpha L$ (correct)
- $A = \alpha / L$
- $A = L - \alpha$
What parameters are needed to predict link performance in rain?
What parameters are needed to predict link performance in rain?
- Rain rate, specific attenuation, polarization
- Rain rate, path length in rain, statistics of heavy rain at site location (correct)
- Path length in rain, frequency, drop-size distribution
- Rain rate, temperature, humidity
How is attenuation due to rain modeled?
How is attenuation due to rain modeled?
- $\alpha = aR^b$ dB/km (correct)
- $\alpha = a - bR$ dB/km
- $\alpha = a + bR$ dB/km
- $\alpha = a / bR$ dB/km
For an effective slant path length of 5 km, what is the attenuation if rain rate, $R$, is 50 mm/hr, frequency, $f$, is 2.5 GHz, $a = 3.87 \times 10^{-4}$, and $b = 1.31$?
For an effective slant path length of 5 km, what is the attenuation if rain rate, $R$, is 50 mm/hr, frequency, $f$, is 2.5 GHz, $a = 3.87 \times 10^{-4}$, and $b = 1.31$?
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What has little effect on attenuation due to their low water content?
What has little effect on attenuation due to their low water content?
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