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Figure 472478: SEAMCAT Interface to the ITU-R P. 1546-4 propagation model

 

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Table 8789: ITU-R Recommendation P.1546-4 propagation model

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Description

Symbol

Type

Unit

Comments

Variation

 

 

 




Variation in path loss

General environment

 

 

 




Environment of the propagation: urban, rural, suburban, dense urban

System

 

 

 




Mobile, broadcasting digital and broadcasting analogue

Time Percentage (min)

 

 

 




Minimum time variability from which the field strength values  are exceeded

Time percentage (max)

 

 

 




Maximum time variability from which the field strength values are exceeded

use user specified local clutter height

 

 

 




User selectable clutter height value which overwrite any predefined value when selected

use user specified standard deviation

 

 

 




User selectable standard deviation value which overwrite any predefined value when selected

Area of location variability

 

 

 




500x500 m, < 2km radius, < 50 km radius

Terminal designations

 

 

 




When selected the algorithm will consider the option a), b) and c) of ITU-R. 1546-4 Annex 5 §1.1. By default it is selected.

 


 This propagation model is fully described in Recommendation ITU-R P.1546-4. Only the land path is implemented. The sea path and the mixed sea/land path are not implemented. The ranges of application are the same as for the P1546-1.