1
The propagation curves
2 Maximum field
strengths
3 Computer-based
tabulations
4 Step-by-step
method
5 Designation of
antennas
6 Transmitting/base
antenna height
7 Transmitting/base
antenna heights used for curves
8 Time variability
9 Mixed-path
method
10 Receiving/mobile
antenna height
11 Terrain clearance
angle correction
12 Location variability
13 Equivalent basic
transmission loss
14 Variability of
atmospheric refractive index
15 Compatibility with
the Okumura-Hata method
1 Introduction
1.1
The terminal designations
2 Maximum field-strength
values
3 Determination of
transmitting/base antenna height, h1
3.1
Land paths shorter than 15 km
3.1.1 Terrain information
not available
3.1.2 Terrain information
available
3.2
Land paths of 15 km or longer
3.3
Sea paths
4 Application of
transmitting/base antenna height, h1
4.1
Transmitting/base antenna height, h1, in the
range 10 m to 3 000 m
4.2
Transmitting/base antenna height, h1, in the
range 0 m to 10 m
For a land path:
For a sea path:
4.3
Negative values of transmitting/base antenna height, h1
5 Interpolation of
field strength as a function of distance
6 Interpolation
and extrapolation of field strength as a function of frequency
7 Interpolation of
field strength as a function of percentage time
8 Mixed paths
8.1
The mixed path interpolation factor, A
9 Correction for
receiving/mobile antenna height
10 Correction for short
urban/suburban paths
11 Terrain clearance
angle correction
12 Location variability
in land area-coverage prediction
13 Correction based on
tropospheric scattering
14 Field-strength
predictions for distances less than 1 km
15 An approximation to
the inverse complementary cumulative normal distribution function
16 Equivalent basic transmission loss
17
An approximation to the 0.6
Fresnel clearance path length