A spherical propagation model based on various ITU-R Recs 452, 676 and 526 is applied in SEAMCAT for larger distances and higher frequencies
Figure 469: SEAMCAT Interface to the Spherical diffraction propagation model
Table 82: Spherical diffraction propagation model
Description | Symbol | Type | Unit | Comments |
Variation |
|
|
| Variation in path loss takes into account the uncertainty of building design, furniture, room size, etc. |
Wall loss(indoor - indoor) |
| S | dB |
|
Wall loss std dev (indoor -indoor) |
| S | dB |
|
Wall loss(indoor - outdoor) |
| S | dB |
|
Wall loss std dev (indoor - outdoor) |
| S | dB |
|
Loss between adjacent floor |
| S | dB |
|
Empirical parameters: | b |
|
|
|
Size of the room | droom | S | m |
|
Height of each floor | hfloor | S | m |
|
Water concentration |
| S | g/m^2 |
|
Earth surface admittance |
|
|
|
|
Refraction Index gradient |
|
|
|
|
Refraction layer probability |
|
|
|
|
Time percentage (min) |
|
|
|
|
Time percentage (max) |
|
|
|
|