AlexSSS
2013-12-03, 08:14 PM
RECOMMENDATION ITU-R P.1812-3 (09/2013)
A path-specific propagation prediction method for point-to-area
terrestrial services in the VHF and UHF bands
Scope
This Recommendation describes a propagation prediction method suitable for terrestrial point-to-area
services in the frequency range 30 MHz to 3 GHz. It predicts signal levels at the median of the multipath
distribution exceeded for a given percentage of time, p%, in the range 1% ≤ p ≤ 50% and a given percentage
of locations, pL, in the range 1% ≤ pL ≤ 99%. The method provides detailed analysis based on the terrain
profile.
The method is suitable for predictions for radiocommunication systems utilizing terrestrial circuits having
path lengths from 0.25 km up to about 3 000 km distance, with both terminals within approximately 3 km
height above ground. It is not suitable for propagation predictions on either air-ground or space-Earth radio
circuits.
http://www.itu.int/dms_pubrec/itu-r/rec/p/R-REC-P.1812-3-201309-I!!PDF-E.pdf
A path-specific propagation prediction method for point-to-area
terrestrial services in the VHF and UHF bands
Scope
This Recommendation describes a propagation prediction method suitable for terrestrial point-to-area
services in the frequency range 30 MHz to 3 GHz. It predicts signal levels at the median of the multipath
distribution exceeded for a given percentage of time, p%, in the range 1% ≤ p ≤ 50% and a given percentage
of locations, pL, in the range 1% ≤ pL ≤ 99%. The method provides detailed analysis based on the terrain
profile.
The method is suitable for predictions for radiocommunication systems utilizing terrestrial circuits having
path lengths from 0.25 km up to about 3 000 km distance, with both terminals within approximately 3 km
height above ground. It is not suitable for propagation predictions on either air-ground or space-Earth radio
circuits.
http://www.itu.int/dms_pubrec/itu-r/rec/p/R-REC-P.1812-3-201309-I!!PDF-E.pdf