Policy on Intellectual Property Right (IPR)
�1���� Introduction
�2���� Interference propagation
mechanisms
�3���� Clear-air interference
prediction
������� 3.1���� General comments
������� 3.2���� Deriving a prediction
����������������� 3.2.1���� Outline of
the procedure
Step 1: Input data
Step 2: Selecting average year or worst-month prediction
Step 3: Radiometeorological data
Large bodies of inland water
Large inland lake or wet-land areas
Effective Earth radius
Step 4: Path profile analysis
�4� ���Clear-air propagation models
������� 4.1���� Line-of-sight
propagation (including short-term effects)
������� 4.2���� Diffraction
����������������� 4.2.1���� The
Bullington part of the diffraction calculation
Case 1. Path is LoS
Case 2. Path is transhorizon
����������������� 4.2.2���� Spherical-Earth
diffraction loss
Start of calculation to be performed twice, as described
above:
����������������� 4.2.3���� Complete
�delta-Bullington� diffraction loss model
����������������� 4.2.4���� The
diffraction loss not exceeded for p% of the time
������� 4.3���� Tropospheric scatter
(Notes 1 and 2)
������� 4.4���� Ducting/layer
reflection
������� 4.5���� Additional clutter
losses
����������������� 4.5.1���� General
����������������� 4.5.2���� Clutter
categories
�� ���������������4.5.3���� The
height-gain model
����������������� 4.5.4���� Method of
application
������� 4.6���� The overall prediction
������� 4.7���� Calculation of
transmission loss
�5���� Hydrometeor-scatter
interference prediction
������� 5.1���� Introduction
������� 5.2���� Input parameters
������� 5.3���� The step-by-step
procedure
Step 1: Determination of meteorological parameters
Step 2: Conversion of geometrical parameters to plane-Earth
representation
Step 3: Determination of link geometry
Step 4: Determination of geometry for antenna gains
Step 5: Determination of path lengths within the rain cell
Step 6: Attenuation outside the rain cell
Step 7: Numerical integration of the scatter transfer function
The extended trapezoidal rule
Step 8: Determination of other loss factors
Step 9: Determination of the cumulative distribution of
transmission loss
�1���� Introduction
�2���� Maps of vertical variation of
radio refractivity data and surface refractivity
�1���� Introduction
�2���� Construction of path profile
�3���� Path length
�4���� Path classification
�5���� Derivation of parameters from
the path profile
������� 5.1���� Trans-horizon paths
����������������� 5.1.1���� Interfering
antenna horizon elevation angle, θt
����������������� 5.1.2���� Interfering
antenna horizon distance, dlt
����������������� 5.1.3���� Interfered-with
antenna horizon elevation angle, θr
����������������� 5.1.4���� Interfered-with
antenna horizon distance, dlr
����������������� 5.1.5���� Angular
distance θ (mrad)
����� ������������5.1.6���� �Smooth-Earth�
model and effective antenna heights