User Reference and Installation Guide
3-11
© 2006 Microwave Data Systems Inc. All Rights Reserved.
MDS FOUR.9 Series
05-4561A01, Rev. A
Path Length (Km )
10
TX Tow er Height (m )
30
RX Tow er Height (m )
30
Frequency (MHz)
5800
Calculated Fresnel Clearance Ratio
0.48
MDS FIVE series Link Planner: Fresnel Zone Clearance
Distance
from TX
(Km )
Optical
LOS
Height (m )
1st
Fresnel
Zone
Radius (m )
1st
Fresnel
Zone
Height (m )
Radio LOS (60%
Fresnel
Clearance) Zone
Height (m )
Earth
Curvature
1
(m )
Obstruction
Height (m )
Total Earth
Terrain
Height (m )
Fresnel
Clearance
Ratio
0.0
30.0
0.0
30.0
30.0
0.0
0.0
0.0
-
0.3
30.0
3.5
26.5
27.9
0.1
0.0
0.1
8.42
0.5
30.0
5.0
25.0
27.0
0.3
0.0
0.3
6.00
0.8
30.0
6.0
24.0
26.4
0.4
0.0
0.4
4.95
1.0
30.0
6.8
23.2
25.9
0.5
0.0
0.5
4.32
1.3
30.0
7.5
22.5
25.5
0.6
0.0
0.6
3.91
1.5
30.0
8.1
21.9
25.1
0.8
0.0
0.8
3.61
1.8
30.0
8.6
21.4
24.8
0.8
20.0
20.8
1.06
2.0
30.0
9.1
20.9
24.5
0.9
10.0
10.9
2.10
2.3
30.0
9.5
20.5
24.3
1.0
10.0
11.0
2.00
2.5
30.0
9.8
20.2
24.1
1.1
23.0
24.1
0.60
2.8
30.0
10.1
19.9
23.9
1.2
24.0
25.2
0.48
3.0
30.0
10.4
19.6
23.8
1.2
0.0
1.2
2.76
3.3
30.0
10.6
19.4
23.6
1.3
0.0
1.3
2.70
3.5
30.0
10.8
19.2
23.5
1.3
0.0
1.3
2.65
3.8
30.0
11.0
19.0
23.4
1.4
0.0
1.4
2.60
4.0
30.0
11.1
18.9
23.3
1.4
10.0
11.4
1.67
4.3
30.0
11.2
18.8
23.3
1.4
0.0
1.4
2.54
4.5
30.0
11.3
18.7
23.2
1.5
0.0
1.5
2.53
4.8
30.0
11.3
18.7
23.2
1.5
0.0
1.5
2.52
5.0
30.0
11.4
18.6
23.2
1.5
0.0
1.5
2.51
5.3
30.0
11.3
18.7
23.2
1.5
0.0
1.5
2.52
5.5
30.0
11.3
18.7
23.2
1.5
0.0
1.5
2.53
5.8
30.0
11.2
18.8
23.3
1.4
0.0
1.4
2.54
6.0
30.0
11.1
18.9
23.3
1.4
0.0
1.4
2.57
6.3
30.0
11.0
19.0
23.4
1.4
0.0
1.4
2.60
6.5
30.0
10.8
19.2
23.5
1.3
18.5
19.8
0.94
6.8
30.0
10.6
19.4
23.6
1.3
0.0
1.3
2.70
7.0
30.0
10.4
19.6
23.8
1.2
0.0
1.2
2.76
7.3
30.0
10.1
19.9
23.9
1.2
0.0
1.2
2.84
7.5
30.0
9.8
20.2
24.1
1.1
0.0
1.1
2.94
7.8
30.0
9.5
20.5
24.3
1.0
0.0
1.0
3.05
8.0
30.0
9.1
20.9
24.5
0.9
0.0
0.9
3.20
8.3
30.0
8.6
21.4
24.8
0.8
0.0
0.8
3.38
8.5
30.0
8.1
21.9
25.1
0.8
0.0
0.8
3.61
8.8
30.0
7.5
22.5
25.5
0.6
0.0
0.6
3.91
9.0
30.0
6.8
23.2
25.9
0.5
0.0
0.5
4.32
9.3
30.0
6.0
24.0
26.4
0.4
0.0
0.4
4.95
9.5
30.0
5.0
25.0
27.0
0.3
0.0
0.3
6.00
9.8
30.0
3.5
26.5
27.9
0.1
0.0
0.1
8.42
10.0
30.0
0.0
30.0
30.0
0.0
0.0
0.0
-
Note1: Earth Curvature is based on a spherical Earth model w ith a nominal radius of 6371Km and a typical K-factor of 1.33.
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0
2.0
4.0
6.0
8.0
10.0
D i s t a nc e ( k m)
Opti cal LOS
1st Fr esnel
Radi o LOS
Ear th Cur vatur e
Obstr ucti ons
Summary of Contents for FOUR.9 Series
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