Page Comparison

Anchor

	A17.1012.3
	A17.1012.3

In order to make correctly calculations using the Longley-Rice propagation, model should take into account a number of input parameters describing the weather phenomena, system parameters, sitting criteria, statistical criteria which was shown in the table below.

Anchor

	F476F483F476
	F483

Figure 476483: GUI of the Longley Rice

(proposal in word: The GUI window for this propagation model needs to be modified to correct the typos: - Confidential level à Confidence level, Siting criteria à Site criteria)

Anchor

	T091T094T091
	T094

Table 9194: Longley Rice propagation model

Description	Symbol	Type	Unit	Comments
Variation	-	Boolean	-	Variation in path loss takes into account the uncertainty of building design, furniture, room size, etc.
Mean surface refractivity (Ground refractivity)	-	Scalar	Ns	Equatorial Continental Subtropical Maritime Subtropical Desert Continental Temperate Maritime Temperate over land Maritime Temperate over sea	360 320 370 280 301 320 350
Terrain irregularity parameter	-	Scalar	M	Flat Plains Hills Mountains Rugged mountains	0 30 90 200 500
Electrical ground Conductivity	-	Scalar	S/m	Average ground Poor ground Good ground Fresh water Sea water	0.005 0.001 0.020 0.010 5
Relative permittivity	-	Scalar

		Average ground Poor ground Good ground Fresh water Sea water	15 4 25 81 81
Polarisation	-	List	-	0 – horizontal, 1- vertical
Site Criteria	-	List	-	Random, Careful, Very Careful
Radio climate	-	List	-	Equatorial Continental Subtropical Maritime Subtropical Desert Continental Temperate Maritime Temperate over land Maritime Temperate over sea
Time percentage	-	Distribution or Scalar	%

0.01 – 0.99

1 –99[A1]

[A1]this is already in percent values!

Location percentage

-

Distribution or Scalar

%

0.01 – 0.99

1 –99
Confidence level	-	Distribution or Scalar	%

0.01 – 0.99

1 –99
Mode of variability	-	List	-	Single, individual, broadcast
Standard deviation	Std. dev.	Scalar	dB

Versions Compared

Old Version 3

New Version 4

Key