Attachment NikolskiDetailed.pdf SES-DBE-20100318-00326

Attachment NikolskiDetailed.pdf

This document pretains to SES-DBE-20100318-00326 for Database Entry on a Satellite Earth Station filing.

IBFS_SESDBE2010031800326_806053

DETAILED INTERFERENCE ANALYSIS REPORT

Transmit-Receive Earth Station

Prepared For

Federal Aviation Administration
Nikolski, Alaska

July 16, 2007

TABLE OF CONTENTS

I. Introduction

II. Contents of Report

III. Summary and Results

IV. Conclusion and Recommendations

V. Operational Parameters and Satellite Data

List of Illustrations

Transmit-Receive Earth Station

Figures

Figure 5.1-1 Proposed Earth Station Location

Tables

Table 5.1-1 Earth Station Parameters

Table 5.1-2 Satellite Arc and Elevations

SECTION 1

INTRODUCTION

Transmit-Receive Earth Station

This report presents the results of a detailed interference
analysis for a proposed C-band transmit-receive earth station.
The site was selected by the Federal Aviation Administration and
is located in Nikolski, Alaska.

The analysis presented in this report is based upon the
following:

• Scientific-Atlanta Corp. 4.5 Meter Antenna Model 8345

• Satellite Arc: 103.8 to 194.0 Degrees West Longitude

• Interference Objective: -154 dBW at 6 GHz
-156 dBW at 4 GHz

• Antenna Centerline 10 Feet

• Antenna Uplink Power: -14.3 dBW/4 kHz

• Frequency Band: 5925.00 – 6425.00 MHz (Uplink)
3700.00 - 4200.00 MHz (Downlink)

This detailed interference analysis is meant to provide an
overview of potential interference at this location, and to
recommend a course of future action.

It should be noted that this interference analysis will identify
potential 4 GHz interference into the proposed earth station from
terrestrial interference. This analysis does not predict
interference into, your earth station from, out of band
interference. Over the past several years interference from PCS
base stations, aircraft radio altimeters, government shipboard
and airborne radars have been identified as interfering sources
into receive earth station antennas.

SECTION 2

REPORT CONTENTS AND PROCEDURES

Transmit-Receive Earth Station

This section describes the contents of the report for a proposed
C-band transmit-receive earth station.

Section 1 describes the site location, the antenna considered,
and the system parameters considered in the detailed interference
analysis. The analysis was undertaken to determine the potential
for microwave interference for the transmit-receive earth station
at the site specified.

Initially, a computer analysis of this site was performed to
determine the extent of potential interference on a line-of-sight
(LOS) basis. This analysis considers the microwave environment
with respect to the earth station and calculates predicted signal
levels between these systems. Paths, which exceed a given
objective level, are listed for further analysis. The objective
levels present the maximum interference levels allowed between
the earth station and the surrounding terrestrial microwave
environment for the frequency band of interest.

To further analyze the effect of the predicted interference
conflicts, terrain path profiles were prepared for the critical
cases. This involves identifying potential terrain blockage via
digitized USGS terrain data between the proposed earth station
and the potential interference source. Once this has been
accomplished, predicted over-the-horizon (O-H) losses are
calculated using the techniques of the National Bureau of
Standards Technical Note 101 (Revised).

These calculations give the amount of signal attenuation achieved
due to terrain blockage.

Section 3 summarizes the results of the site analysis. This
summary includes the number of cases that were considered, the
interference cases that remain, and the proposed resolution of
the interference problems.

Section 4 presents summary and recommendations. It gives an
overall description of the microwave environment and suggests a
future course of action.

Table 5.1-1 contains the operational parameters for the proposed
earth station.

Table 5.1-2 provides azimuth and elevation data for the
geostationary arc, and identifies the locations of particular
satellites within that arc.

Figure 5.1-1 indicates the location of the site analyzed. This
location should be verified. If it is not the desired site,
Comsearch should be notified immediately so that the precise
location can be analyzed.

SECTION 3

SUMMARY AND RESULTS

Transmit Band 5925 – 6425 MHz

The detailed interference analysis for the proposed earth station
site to be located in Nikolski, Alaska identified no cases of
potential 6 GHz interference that exceeded the -154 long term
objective.

Receive Band 3700 – 4200 MHz

The detailed interference analysis for the proposed earth station
site to be located in Nikolski, Alaska identified no cases of
potential 4 GHz interference that exceeded the -156 long term
objective.

SECTION 4

CONCLUSION AND RECOMMENDATIONS

Conclusions

Transmit Band 5925 - 6425 MHz

The detailed interference analysis for the proposed earth station
site to be located in Nikolski, Alaska identified no cases of
potential 6 GHz interference that exceeded the -154 long term
objective.

Receive Band 3700 - 4200 MHz

The detailed interference analysis for the proposed earth station
site to be located in Nikolski, Alaska identified no cases of
potential 4 GHz interference that exceeded the -156 long term
objective.

Recommendations

Based on the results of the detailed interference analysis, it is
recommended that this site be coordinated with the common
carriers as the first step toward FCC licensing.

TABLE 5.1-1

SATELLITE EARTH STATION DATA
06/27/2007

Company FEDERAL AVIATION ADMINISTRATION
Earth Station Name, State NIKOLSKI, AK
Latitude (DMS) (NAD83) 52 56 24.0 N
Longitude (DMS) (NAD83) 168 51 32.0 W
Ground Elevation AMSL (Ft/m) 46.00 / 14.02
Antenna Centerline AGL (Ft/m) 10.00 / 3.05

Receive Antenna Type: SCIENTIFIC-ATLANTA 8345
4.0 GHz Gain (dBi) / Diameter (m) 43.3 / 4.5
3 dB / 15 dB Half Beamwidth 1.0 / 2.0

Transmit Antenna Type: SCIENTIFIC-ATLANTA 8345
6.0 GHz Gain (dBi) / Diameter (m) 47.0 / 4.5
3 dB / 15 dB Half Beamwidth 0.5 / 1.0

Operating Mode TRANSMIT AND RECEIVE
Modulation DIGITAL
Emission / Receive Band (MHz) 89K6G7W / 3700.00 - 4200.00

Emission / Transmit Band (MHz) 89K6G7W / 5925.00 - 6425.00

Max. Available RF Power (dBW)/4 kHz) -14.30
(dBW)/MHz) 9.70

Max. EIRP (dBW)/4 kHz) 32.70
(dBW)/MHz) 56.70

Max. Permissible Interference Power
4.0 GHz, 20% (dBW/1 MHz) -156.0
4.0 GHz, 0.0100% (dBW/1 MHz) -146.0

6.0 GHz, 20% (dBW/4 kHz) -154.0
6.0 GHz, 0.0025% (dBW/4 kHz) -131.0

Range of Satellite Arc (Geostationary)
Degrees Longitude 103.8 W / 194.0 W
Azimuth Range (Min/Max) 110.4 / 210.5
Corresponding Elevation Angles 6.1 / 25.2

Radio Climate B
Rain Zone 2

Max. Great Circle Coordination Distance (Mi/Km)
4.0 GHz 325.7 / 524.2
6.0 GHz 132.0 / 212.4

Precipitation Scatter Contour Radius (Mi/Km)
4.0 GHz 371.3 / 597.6
6.0 GHz 62.1 / 100.0

TABLE 5.1-2

Earth Station Azimuth and Elevation Table

Earth Station Name NIKOLSKI, AK
Owner FEDERAL AVIATION ADMINISTRATION
Latitude (DMS) (NAD83) 52 56 24.0 N
Longitude (DMS) (NAD83) 168 51 32.0 W
Ground Elevation (Ft/m) 46.00 / 14.02 AMSL
Antenna Centerline (Ft/m) 10.00 / 3.05 AGL
Satellite Arc Range 103.8 N / 194.0 W

Satellite Azimuth Elevation Satellite
Longitude (Degrees) (Degrees) Name

103.8 110.4 6.1
104.8 111.2 6.6
105.0 111.4 6.8 AMC 18
105.8 112.1 7.2
106.8 112.9 7.8
107.3 113.4 8.1 ANIK F1
107.3 113.4 8.1 ANIK F1R
107.8 113.8 8.3
108.8 114.7 8.9
109.0 114.9 9.0 WILDBLUE 1
109.8 115.6 9.5
110.8 116.5 10.0
111.1 116.7 10.2 ANIK F2
111.8 117.3 10.6
112.8 118.2 11.1
113.0 118.4 11.2 SATMEX 6
113.8 119.1 11.7
114.8 120.1 12.2
114.9 120.1 12.3 SOLIDARIDAD
115.0 120.2 12.3 XM 4
115.8 121.0 12.8
116.8 121.9 13.3 SATMEX 5
117.8 122.8 13.8
118.8 123.8 14.3
119.8 124.7 14.9
120.8 125.6 15.4
121.0 125.8 15.5 GALAXY 23
121.0 125.8 15.5 ECHOSTAR 9
121.8 126.6 15.9
122.8 127.6 16.4
123.0 127.8 16.5 GALAXY 10R
123.8 128.5 16.9
124.8 129.5 17.4
125.0 129.7 17.5 GALAXY 14
125.8 130.5 17.8
126.8 131.5 18.3
127.0 131.7 18.4 GALAXY 13
127.0 131.7 18.4 HORIZONS 1
127.8 132.5 18.8
128.8 133.5 19.3
129.0 133.7 19.4 GALAXY 27
129.8 134.5 19.7
130.8 135.5 20.2
131.0 135.8 20.3 AMC 11

TABLE 5.1-2 (Cont)

Earth Station Azimuth and Elevation Table
06/27/2007

Earth Station Name NIKOLSKI, AK
Owner FEDERAL AVIATION ADMINISTRATION
Latitude (DMS) (NAD83) 52 56 24.0 N
Longitude (DMS) (NAD83) 168 51 32.0 W
Ground Elevation (Ft/m) 46.00 / 14.02 AMSL
Antenna Centerline (Ft/m) 10.00 / 3.05 AGL
Satellite Arc Range 103.8 N / 194.0 W

Satellite Azimuth Elevation Satellite
Longitude (Degrees) (Degrees) Name

131.8 136.6 20.6
132.8 137.6 21.0
133.0 137.8 21.1 GALAXY 15
133.8 138.7 21.5
134.8 139.7 21.9
135.0 139.9 22.0 AMC 10
135.8 140.8 22.3
136.8 141.9 22.7
137.0 142.1 22.8 AMC 7
137.8 143.0 23.1
138.8 144.1 23.5
139.0 144.3 23.5 AMC 8
139.8 145.2 23.8
140.8 146.3 24.2
141.8 147.4 24.6
142.8 148.5 24.9
143.8 149.6 25.2
144.8 150.8 25.5
145.8 151.9 25.9
146.8 153.1 26.2
147.8 154.2 26.4
148.8 155.4 26.7
149.8 156.6 27.0
150.8 157.8 27.2
151.8 159.0 27.5
152.8 160.2 27.7
153.8 161.4 27.9
154.8 162.6 28.1
155.8 163.8 28.3
156.8 165.0 28.5
157.8 166.2 28.6
158.8 167.5 28.8
159.8 168.7 28.9
160.8 169.9 29.0
161.8 171.2 29.1
162.8 172.4 29.2
163.8 173.7 29.3
164.8 174.9 29.4
165.8 176.2 29.4
166.8 177.4 29.5
167.8 178.7 29.5
168.8 179.9 29.5

TABLE 5.1-2 (Cont)

Earth Station Azimuth and Elevation Table
06/27/2007

Earth Station Name NIKOLSKI, AK
Owner FEDERAL AVIATION ADMINISTRATION
Latitude (DMS) (NAD83) 52 56 24.0 N
Longitude (DMS) (NAD83) 168 51 32.0 W
Ground Elevation (Ft/m) 46.00 / 14.02 AMSL
Antenna Centerline (Ft/m) 10.00 / 3.05 AGL
Satellite Arc Range 103.8 N / 194.0 W

Satellite Azimuth Elevation Satellite
Longitude (Degrees) (Degrees) Name

169.8 181.2 29.5
170.8 182.4 29.5
171.8 183.7 29.4
172.8 184.9 29.4
173.8 186.2 29.3
174.8 187.4 29.2
175.8 188.7 29.2
176.8 189.9 29.0
177.0 190.2 29.0 NSS 5
177.8 191.2 28.9
178.8 192.4 28.8
179.8 193.6 28.7
180.0 193.9 28.6 INTELSAT 701
180.8 194.8 28.5
181.8 196.1 28.3
182.8 197.3 28.1
183.8 198.5 27.9
184.8 199.7 27.7
185.8 200.9 27.5
186.8 202.1 27.3
187.8 203.3 27.0
188.0 203.5 27.0 AMC 23
188.8 204.4 26.7
189.8 205.6 26.5
190.8 206.8 26.2
191.0 207.0 26.1 INTELSAT 2
191.8 207.9 25.9
192.8 209.1 25.6
193.8 210.2 25.3
194.0 210.5 25.2 INTELSAT 8

Document Created: 2007-07-16 11:00:40
Document Modified: 2007-07-16 11:00:40

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