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A17.7.1
A17.7.1
This is the point-to-area propagation loss model. There are two implementation of this recommendation in SEAMCAT (ITU-R Rec.P.1546-1 and ITU-R Rec.P.1546-4 (see next section)).

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  • Restriction to propagation over land paths only;
  • Flat terrain;
  • No negative antenna heights.

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F471
F471
Figure 471: SEAMCAT Interface to the P1546-1 propagation model

 

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T084
T084
Table 84: ITU-R Recommendation P.1546-1 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

System

 

 

 

Digital (BW<1MHz), Digital (BW>1MHz), Analogue

Time Percentage (min)

 

 

 

Minimum time variability from which the field strengths value are exceeded

Time percentage (max)

 

 

 

Maximum time variability from which the field strengths value are exceeded

use user specified local clutter height

 

 

 

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

 

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