# earthSurfacePermittivity

## Syntax

## Description

The `earthSurfacePermittivity`

function computes the real relative
permittivity, conductivity, and complex relative permittivity of earth surface materials. The
computations are based on the methods and equations presented in International
Telecommunication Union Recommendation (ITU-R) P.527-5 through ITU-R P.527-6 [1]. The
`earthSurfacePermittivity`

function provides various syntaxes to account for
characteristics germane to the specified surface material.

### Water

`[`

calculates the real relative permittivity, conductivity, and complex relative permittivity
of pure water at the specified frequency and temperature.`epsilon`

,`sigma`

,`complexepsilon`

] = earthSurfacePermittivity("pure-water",`fc`

,`temp`

)

### Ice

`[`

calculates the real relative permittivity, conductivity, and complex relative permittivity
of pure ice at the specified frequency and temperature.`epsilon`

,`sigma`

,`complexepsilon`

] = earthSurfacePermittivity("pure-ice",`fc`

,`temp`

)

`[`

calculates the real relative permittivity, conductivity, and complex relative permittivity
of wet ice at the specified frequency and liquid water volume fraction.`epsilon`

,`sigma`

,`complexepsilon`

] = earthSurfacePermittivity("wet-ice",`fc`

,`liqfrac`

)

### Snow

### Soil

`[`

calculates the real relative permittivity, conductivity, and complex relative permittivity
of soil at the specified frequency, temperature, percentage of sand by volume, percentage
of clay by volume, specific gravity, and volumetric water content. This syntax uses an
approximation formula for the bulk density of the soil. `epsilon`

,`sigma`

,`complexepsilon`

] = earthSurfacePermittivity("soil",`fc`

,`temp`

,`sandpercent`

,`claypercent`

,`sg`

,`vwc`

)

`[`

specifies the bulk density of the soil in addition to the input arguments from the
previous syntax.`epsilon`

,`sigma`

,`complexepsilon`

] = earthSurfacePermittivity("soil",`fc`

,`temp`

,`sandpercent`

,`claypercent`

,`sg`

,`vwc`

,`bulkdensity`

)

## Examples

## Input Arguments

## Output Arguments

## More About

## References

[1] International
Telecommunications Union Radiocommunication Sector. *Electrical Characteristics of the
Surface of the Earth*. Recommendation P.527. ITU-R, approved September 27, 2021.
https://www.itu.int/rec/R-REC-P.527/en.

## Extended Capabilities

## Version History

**Introduced in R2020a**