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A17.8.1
A17.8.1


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F472
F472
Figure 472: SEAMCAT Interface to the P1546ITU-R P. 1546-4 propagation model

 

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T087
T087
Table 87: ITU-R Recommendation P.1546-4 propagation model

 

Description

Symbol

Type

Unit

Comments

Variation

 

 

 

Variation in path loss

takes into account the uncertainty of building design, furniture, room size, etc.

General environment

 

 

 

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

System

 

 

 

Mobile, broadcasting digital and

braodcasting

broadcasting analogue

Time Percentage (min)

 

 

 

Minimum time variability from which the field

strengths value

strength values  are exceeded

Time percentage (max)

 

 

 

Maximum time variability from which the field

strengths value are

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.