A17.5 SPHERICAL DIFFRACTION
- Former user (Deleted)
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 474: SEAMCAT Interface to the Spherical diffraction propagation model
Table 83: 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) | Scalar | dB | ||
Wall loss std dev (indoor - indoor) | Scalar | dB | ||
Wall loss (indoor - outdoor) | Scalar | dB | ||
Wall loss std dev (indoor - outdoor) | Scalar | dB | ||
Loss between adjacent floor | Scalar | dB | ||
Empirical parameters: | b | |||
Size of the room | droom | Scalar | m | |
Height of each floor | hfloor | Scalar | m | |
Water concentration | Scalar | g/m^2 | ||
Earth surface admittance | ||||
Refraction Index gradient | ||||
Refraction layer probability | ||||
Time percentage (min) | ||||
Time percentage (max) |