probabaja
2013-01-11, 09:48 PM
Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3000 MHz
This Recommendation describes a method for point-to-area radio propagation predictions for terrestrial
services in the frequency range 30 MHz to 3 000 MHz. It is intended for use on tropospheric radio circuits
over land paths, sea paths and/or mixed land-sea paths between 1-1 000 km length for effective transmitting
antenna heights less than 3 000 m. The method is based on interpolation/extrapolation from empirically
derived field-strength curves as functions of distance, antenna height, frequency and percentage time. The
calculation procedure also includes corrections to the results obtained from this interpolation/extrapolation to
account for terrain clearance and terminal clutter obstructions.
31209
This Recommendation describes a method for point-to-area radio propagation predictions for terrestrial
services in the frequency range 30 MHz to 3 000 MHz. It is intended for use on tropospheric radio circuits
over land paths, sea paths and/or mixed land-sea paths between 1-1 000 km length for effective transmitting
antenna heights less than 3 000 m. The method is based on interpolation/extrapolation from empirically
derived field-strength curves as functions of distance, antenna height, frequency and percentage time. The
calculation procedure also includes corrections to the results obtained from this interpolation/extrapolation to
account for terrain clearance and terminal clutter obstructions.
31209