Fog

Fog propagation model

Description

Model the behavior of electromagnetic radiation from a point of transmission as it travels through fog or clouds by using a Fog object. For more information about the model, see [1]. Propagation models for fog are valid from 10 to 1000 GHz, assume line-of-sight (LOS) conditions, and disregard terrain, the curvature of the Earth, and other obstacles.

Creation

Create a Fog object by using the propagationModel function.

Properties

Temperature — Air temperature in °C

15 (default) | scalar

Air temperature in °C, specified as a scalar.

Data Types: double

WaterDensity — Liquid water density in g/m³

0.5 (default) | scalar

Liquid water density in g/m³, specified as a scalar.

Data Types: double

Object Functions

pathloss	Path loss of radio wave propagation
range	Range of radio wave propagation
add	Add propagation models

Examples

Model Coverage in Thick Fog

Display the coverage area for a transmitter in thick fog.

Create a propagation model for fog. Specify the water density as 0.5 grams per cubic meter.

pm = propagationModel("fog","WaterDensity",0.5);

Create a transmitter site. Display the coverage area for the transmitter. Propagation models for fog require transmitter frequencies between 10 and 1000 GHz.

tx = txsite("Name","Apple Hill","TransmitterFrequency",1e10, ...
    "Latitude",42.3001,"Longitude",-71.3604);
coverage(tx,pm)

References

[1] International Telecommunications Union Radiocommunication Sector. Attenuation due to clouds and fog. Recommendation P.840-6. ITU-R, approved September 30, 2013. https://www.itu.int/rec/R-REC-P.840/en.

[2] Seybold, John S. Introduction to RF Propagation. Hoboken, N.J: Wiley, 2005.

Version History

Introduced in R2019b