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Radio propagation: Difference between revisions
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The result is signal attenuation in dB along the direct path. The ITM functions will determine for us if the radio propagation is line-of-sight, diffraction dominant or tropospheric scatter. For diffraction propagation, it also determines if it's single horizon or double horizon. | The result is signal attenuation in dB along the direct path. The ITM functions will determine for us if the radio propagation is line-of-sight, diffraction dominant or tropospheric scatter. For diffraction propagation, it also determines if it's single horizon or double horizon. | ||
This information will further be used in calculating ground clutter obstruction for different terrain types. The most frequent obstructions that affect radio signals are built-up areas and tall vegetation. By calculating the interference of ground clutter inside the first Fresnel zone, we can determine signal losses with average precision. | This information will further be used in calculating ground clutter obstruction for different terrain types. The most frequent obstructions that affect radio signals are built-up areas and tall vegetation. By calculating the interference of ground clutter inside the first Fresnel zone, we can determine signal losses with average precision. | ||
In order to do so, we need two more | In order to do so, we need two more numbers in the equations: clutter height above terrain, and clutter density. These are stored inside a plain text file located inside the Materials/ directory, allowing for more terrain types to be added and properties to be changed by the user. The aim is to make these two factors as configurable as possible to the user, in order to be able to adapt them to local measured conditions. | ||
The radio stations parameters are also completely configurable by the user, by setting internal properties, via Nasal scripting or otherwise. | The radio stations parameters are also completely configurable by the user, by setting internal properties, via Nasal scripting or otherwise. | ||