# rainpl

RF signal attenuation due to rainfall using ITU model

## Syntax

## Description

returns the signal attenuation, `L`

= rainpl(`range`

,`freq`

,`rainrate`

)`L`

, due to rain with a long-term
statistical rain rate. In this syntax, attenuation is a function of signal path
length, `range`

, signal frequency, `freq`

, and
rain rate, `rainrate`

. The path elevation angle and polarization
tilt angles are assumed to be zero.

The `rainpl`

function applies the International
Telecommunication Union (ITU) rainfall attenuation model to calculate
path loss of signals propagating in a region of rainfall [1]. The function applies when the signal
path is contained entirely in a uniform rainfall environment. Rain
rate does not vary along the signal path. The attenuation model applies
only for frequencies at 1–1000 GHz.

## Examples

## Input Arguments

## Output Arguments

## More About

## References

[1] Radiocommunication Sector of International
Telecommunication Union. *Recommendation ITU-R P.838-3:
Specific attenuation model for rain for use in prediction methods*.
2005.

[2] Radiocommunication Sector of
International Telecommunication Union. *Recommendation ITU-R P.530-17:
Propagation data and prediction methods required for the design of terrestrial
line-of-sight systems*. 2017.

[3] *Recommendation
ITU-R P.837-7: Characteristics of precipitation for propagation
modelling*

[4] Seybold, J. *Introduction to RF Propagation*.
New York: Wiley & Sons, 2005.