Engineering Document
Field Radio Path Study for SCADA Network
Stanislaus Project
April 2022
Release for Customer Review
Confidentially Statement
2022 Americas Communications LLC
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Stanislaus
Radio Path Study
Prepared by
Date
Rev
Americas Communications LLC
5/25/2021
1
About This Document
This document provides the radio path study results for the Stanislaus Project.
Audience
This document is intended for technical and management personnel at Jacobs Engineering
and San Joaquin Electric, Inc or its technical and legal representatives.
Document Conventions
This document uses the following conventions:
Convention
 Note
Description
Notes contain additional helpful information such as an explanation, a comment,
a clarification about the subject
 Tip
Tips contain practical information that may help you solve a problem or describe
actions that may save your time

Important
Important tags contain warnings or cautions to protect the user from personal
injury, or to prevent equipment damage, data loss, or other similar conditions
Document History
Version
1.0
For Customer
Description
Initial Version
Date
5/25/2021
© 2022 Americas Communications LLC
Author
Ochoa, J
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Stanislaus
Radio Path Study
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Table of Contents
1 LIST OF SITES AND PATHS .................................................................................... 4
2
1.1
SITES .................................................................................................................. 4
1.2
PATHS ................................................................................................................ 4
SITE INFORMATION – CERES ............................................................................... 5
2.1
3
SITE INFORMATION – WTP ................................................................................... 6
3.1
4
Site Description ................................................................................................... 5
Site Description ................................................................................................... 6
SITE INFORMATION – TURLOCK ......................................................................... 7
4.1
Site Description ................................................................................................... 7
5
PATH INFORMATION: CERES – TURLOCK ........................................................ 8
6
PATH INFORMATION: TURLOCK – WTP ............................................................ 9
7
PATH INFORMATION: CERES – WTP ................................................................. 11
8
SUMMARY............................................................................................................... 13
9
REVISED PROPOSED NETWORK ........................................................................ 14
For Customer
© 2022 Americas Communications LLC
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Stanislaus
Radio Path Study
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1
LIST OF SITES AND PATHS
1.1
SITES



1.2
CERES
WTP
TURLOK
PATHS



CERES – TURLOCK
TURLOCK – WTP
CERES – WTP
For Customer
© 2022 Americas Communications LLC
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SITE INFORMATION – CERES
2
2.1
Site Description
Customer Supplied Site
Coordinates, CA 1983, Zone III (ft)
Northing:
2044930.6022
Easting:
6438397.5415
Elevation:
107 ft
32.6 m
Street Address:
City:
County:
State:
3761 E Hatch Rd
Ceres
Stanislaus
CA
Tower Considerations:
Tower Structure: ☐Existing
Tower Type:
☐Guyed
☐Other:
☒New
☐SSP
____________
Customer Supplied Site
Coordinates, NAD 83
Latitude:
37 36 36.72 N
Longitude:
120 55 32.03 W
Elevation:
107 ft
32.6 m
FAA Study:
☒Monopole
2021-AWP-8140-OE
☐Rooftop
☐Water Tank
The proposed structure is a direct embedded monopole with a height of 100 ft AGL. If
FAA determines a 100 ft monopole as a hazard, structure must have a minimum
height of 50 ft AGL and WTP structure must have a minimum height of 150 ft.
Antenna Mounting Considerations for each path:
 Path to WTP: Antenna to be installed at a centerline 95 ft on a collar mount. WTP
structure required height is 100 ft.
o CL:
95 ft
o Azimuth:
86.7°
Antenna Mounting FAA Limitations for each path:
 Path to WTP: Antenna minimum centerline 48 ft on a collar mount. WTP structure
required height is 150 ft.
o CL:
48 ft
o Azimuth:
86.7°
For Customer
© 2022 Americas Communications LLC
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Stanislaus
Radio Path Study
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SITE INFORMATION – WTP
3
3.1
Site Description
Customer Supplied Site
Coordinates, CA 1983, Zone III (ft)
Northing:
2046666.2
Easting:
6463365.64
Elevation:
122 ft
37.2 m
Street Address:
City:
County:
State:
Customer Supplied Site
Coordinates, NAD 83
Latitude:
37 36 54.89 N
Longitude:
120 50 21.80 W
Elevation:
122 ft
37.2 m
Aldrich Rd
Hughson
Stanislaus
CA
Tower Considerations:
Tower Structure: ☐Existing
Tower Type:
☐Guyed
☐Other:
FAA Study:
☒New
☐SSP
____________
☒Monopole
To be filed
☐Rooftop
☐Water Tank
The proposed structure is a direct embedded monopole with a height of 100 ft AGL. If
FAA determines a 100 ft monopole at Ceres as a hazard, structure must have a
minimum height of 150 ft and Ceres must have a minimum height of 50 ft.
Antenna Mounting Considerations for each path:
 Path to Ceres: Antenna to be installed at a centerline 90 ft on a collar mount. Ceres
structure required height is 100 ft.
o CL:
90 ft
o Azimuth:
265.8°
 Path to Turlock: Antenna to be installed at a centerline 95 ft on a collar mount.
Turlock structure required height is 100 ft.
o CL:
95 ft
o Azimuth:
170.26°
Antenna Mounting FAA Limitations for each path:
 Path to Ceres: Antenna minimum centerline 145 ft on a collar mount. When Ceres
structure height is limited to 50 ft.
o CL:
145 ft
o Azimuth:
265.8°
For Customer
© 2022 Americas Communications LLC
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Stanislaus
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5/25/2021
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SITE INFORMATION – TURLOCK
4
4.1
Site Description
Customer Supplied Site
Coordinates, CA 1983, Zone III (ft)
Northing:
2013653.32
Easting:
6468906.83
Elevation:
122 ft
37.2 m
Street Address:
City:
County:
State:
Customer Supplied Site
Coordinates, NAD 83
Latitude:
37 31 28.68 N
Longitude:
120 49 11.52 W
Elevation:
122 ft
37.2 m
3500 N Quincy Rd
Denair
Stanislaus
CA
Tower Considerations:
Tower Structure: ☐Existing
Tower Type:
☐Guyed
☐Other:
☒New
☐SSP
____________
FAA Study:
☒Monopole
To be filed
☐Rooftop
☐Water Tank
The proposed structure is a direct embedded monopole with a height of 100 ft AGL.
Antenna Mounting Considerations for each path:
 Path to WTP: Antenna to be installed at a centerline 95 ft on a collar mount. WTP
structure required height is 100 ft.
o CL:
95 ft
o Azimuth:
350.28°
Antenna Mounting FAA Limitations for each path:
 None
For Customer
© 2022 Americas Communications LLC
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5
PATH INFORMATION: CERES – TURLOCK
PATH DESCRIPTION
Path Length:
8.28 mi
Frequency Band:
11 GHz
Path Propagation Conditions: NLOS (No Line of Sight) - Total obstruction of the
Fresnel Zone
Path Survey notes:
This is a short path, with a low difference in elevation between the sites. The control
point along this path is vegetation. The vegetation along this path is a mix of tree types,
of heights between 20 and 55 ft. No Line of Sight has been determined,
ATC
TOWER
TURLOCK
NLOS
CERES – TURLOCK BLOCKED BY VEGERATION
Determination: NLOS (No Line of Sight) – Path Obstructed
For Customer
© 2022 Americas Communications LLC
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6
PATH INFORMATION: TURLOCK – WTP
PATH DESCRIPTION
Path Length:
6.34 mi
Frequency Band:
11 GHz
Path Propagation Conditions: LOS (Line of Sight) – Optical/Electrical Line of Sight
Path Survey notes:
This is a short path, with a low difference in elevation between the sites. The control
point along this path is vegetation. The vegetation along this path is a mix of tree types,
of heights between 20 and 55 ft. A tree growth factor of 10 ft was added to
accommodate expected future growth. Line of Sight has been determined and Electrical
Line of Sight was confirmed by testing with Path Aligner devices.
WTP
Site
TURLOCK – WTP VISUAL LOS CONFIRMATION
Path Survey Link Testing:
For Customer
© 2022 Americas Communications LLC
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Stanislaus
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Path Aligner Link Budget
Item
Local Station
Max Tx Power
Common Losses TX
Antenna Gain
EIRP
Propagation
Free Space Loss
Remote Station
Remote Station Antenna
Gain
Common Losses RX
Path Loss
Expected Receive Signal
11 GHz
Units Comments
Notes
0
1.0
30.0
29.0
dBm
dB
dBi
dBm
A
B
C
D=A-B+C
Typical, Path Aligner Tx Power
133.5
dB
E
LOS No additional loss
30.0
dBi
F
Typical, 2 Ft. Antenna Gain
1.0
dB
G
Typical, Coax Line Loss
-75.5
dB
H=D- E+F-G
@ Path Aligner Receiver
Typical, Coax Line Loss
Typical, 2 Ft. Antenna Gain
ERP=EIRP – 2.15dB
TURLOCK – WTP PATH TESTING
PATH ALIGNER RSL
75.5 dBm
Determination: LOS (Line of Sight) – Optical/Electrical Line of Sight
For Customer
© 2022 Americas Communications LLC
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Americas Communications LLC
5/25/2021
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7
PATH INFORMATION: CERES – WTP
PATH DESCRIPTION
Path Length:
4.74 mi
Frequency Band:
11 GHz
Path Propagation Conditions: LOS (Line of Sight) – Optical/Electrical Line of Sight
Path Survey notes:
This is a short path, with a low difference in elevation between the sites. The control
point along this path is a line of 40 ft trees 0.25 miles east of the proposed structure.
The vegetation along this path is a mix of tree types, of heights between 20 and 40 ft. A
tree growth factor of 10 ft was added to accommodate expected future growth. Line of
Sight has been determined and Electrical Line of Sight was confirmed by testing with
Path Aligner devices. Structure height may be limited by FAA determination. The path
was tested at the minimum possible antenna center line of 48 ft.
WTP
Site
CERES – WTP VISUAL LOS CONFIRMATION
Path Survey Link Testing:
For Customer
© 2022 Americas Communications LLC
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Stanislaus
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5/25/2021
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Path Aligner Link Budget
Item
Local Station
Max Tx Power
Common Losses TX
Antenna Gain
EIRP
Propagation
Free Space Loss
Remote Station
Remote Station Antenna
Gain
Common Losses RX
Path Loss
Expected Receive Signal
11 GHz
Units Comments
Notes
0
1.0
30.0
29.0
dBm
dB
dBi
dBm
A
B
C
D=A-B+C
Typical, Path Aligner Tx Power
130.9
dB
E
LOS No additional loss
30.0
dBi
F
Typical, 2 Ft. Antenna Gain
1.0
dB
G
Typical, Coax Line Loss
-72.9
dB
H=D- E+F-G
@ Path Aligner Receiver
CERES – WTP PATH TESTING
Typical, Coax Line Loss
Typical, 2 Ft. Antenna Gain
ERP=EIRP – 2.15dB
PATH ALIGNER RSL 74.2 dBm
Determination: LOS (Line of Sight) – Optical/Electrical Line of Sight
For Customer
© 2022 Americas Communications LLC
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Stanislaus
Radio Path Study
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Americas Communications LLC
5/25/2021
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8
SUMMARY
Case 1: FAA Determines Ceres 100 ft Tower is not hazard to air navigation
Path
Site A CL
Site B CL
Determination
Site A
Structure Height
Site B
Structure Height
Turlock –
WTP
95 ft
95 ft
LOS
100 ft
100 ft
Ceres - WTP
95 ft
90 ft
LOS
100 ft
100 ft
Case 2: FAA Determines Ceres 100 ft Tower is hazard to air navigation
Path
Site A CL
Site B CL
Determination
Site A
Structure Height
Site B
Structure Height
Turlock –
WTP
95 ft
95 ft
LOS
100 ft
150 ft
Ceres - WTP
48 ft
145 ft
LOS
50 ft
150 ft
Ceres minimum antenna CL is 48 ft.
In case FAA finds Ceres 50 ft is a hazard, the structure must be relocated.
For Customer
© 2022 Americas Communications LLC
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9
REVISED PROPOSED NETWORK
For Customer
© 2022 Americas Communications LLC
Page 14