# radarpropfactor

## Syntax

## Description

calculates the one-way propagation factor assuming a surface target and a sea state of
`F`

= radarpropfactor(`R`

,`freq`

,`ANHT`

)`0`

. The calculation estimates the complex relative permittivity
(dielectric constant) of the reflecting surface using a sea water model described in [1] that is valid from
`100`

MHz to `10`

GHz. The target height is assumed to
be the height of significant clutter sources above the average surface height. Specifically,
the target height is calculated as `3`

times the standard deviation of the
surface height. Assuming the paths are the same, the two-way propagation factor is
2`F`

. Atmospheric refraction is taken into account through the use of
an `EffectiveEarthRadius`

that can be specified. Scattering and ducting
are assumed to be negligible.

allows you to specify additional input parameters as Name-Value arguments. You can specify
additional name-value pair arguments in any order. This syntax can use any of the input
arguments in the previous syntax.`F`

= radarpropfactor(___,`Name,Value`

)

`radarpropfactor(___)`

plots the one-way propagation
factor in dB versus range in km. Default range units are km.

## Examples

## Input Arguments

## Output Arguments

## References

[1] Blake, L.V. "Machine Plotting of Radar Vertical-Plane Coverage Diagrams." Naval Research Laboratory, 1970 (NRL Report 7098).

[2] Barton, David K. *Radar
Equations for Modern Radar*. Norwood, MA: Artech House, 2013.

## Extended Capabilities

## Version History

**Introduced in R2021a**