Attachment FREQ COORDINATION SES-MOD-20150722-00472

Attachment FREQ COORDINATION

This document pretains to SES-MOD-20150722-00472 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2015072200472_1096208

FREQUENCY COORDINATION AND INTERFERENCE
ANALYSIS REPORT

Prepared for

Alascom Inc
Egegik, Alaska
(Call Sign: E5419)

Satellite Earth Station

Prepared By:
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, Virginia 20147
June 22, 2015

TABLE OF CONTENTS
1. CONCLUSIONS ............................................................................................................................................ 3
2. SUMMARY OF RESULTS ............................................................................................................................ 4
3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5
4. EARTH STATION COORDINATION DATA .................................................................................................. 6
5. CERTIFICATION ......................................................................................................................................... 10

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 2 of 10

1. CONCLUSIONS

An interference study considering all existing, proposed and prior coordinated microwave
facilities within the coordination contours of the proposed earth station demonstrates that
this site will operate satisfactorily with the common carrier microwave environment.
Further, there will be no restrictions of its operation due to interference considerations.

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 3 of 10

2. SUMMARY OF RESULTS

A number of great circle interference cases were identified during the interference study of
the proposed earth station. Each of the cases, which exceeded the interference objective
on a line-of-sight basis, was profiled and the propagation losses estimated using NBS
TN101 (Revised) techniques. The losses were found to be sufficient to reduce the signal
levels to acceptable magnitudes in every case.

The following companies reported potential great circle interference conflicts that did not
meet the objectives on a line-of-sight basis. When over-the-horizon losses are considered
on the interfering paths, sufficient blockage exists to negate harmful interference from
occurring with the proposed transmit-receive earth station.

Company

None

No carriers reported potential interference cases.

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 4 of 10

3. SUPPLEMENTAL SHOWING
Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this
application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of
the FCC Rules and Regulations.

Expedited coordination data for this earth station was emailed and sent to the below listed carriers with a
letter dated June 10, 2015.

Company

Kodiak Microwave System
United Utilities, Inc.

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 5 of 10

4. EARTH STATION COORDINATION DATA
This section presents the data pertinent to frequency coordination of the proposed earth station that was
circulated to all carriers within its coordination contours.

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 6 of 10

COMSEARCH
Earth Station Data Sheet
19700 Janelia Farm Boulevard, Ashburn, VA 20147
(703)726-5500 http://www.comsearch.com

Date: 06/22/2015
Job Number: 150610COMSJC06
Administrative Information
Status ENGINEER PROPOSAL
Call Sign E5419
Licensee Code P1040
Licensee Name Alascom, Inc.
Site Information EGEGIK, ALASKA
Venue Name
Latitude (NAD 83) 58° 12' 50.6" N
Longitude (NAD 83) 157° 22' 20.4" W
Climate Zone A
Rain Zone 2
Ground Elevation (AMSL) 24.38 m / 80.0 ft
Link Information
Satellite Type Geostationary
Mode TR - Transmit-Receive
Modulation Digital
Satellite Arc 94° W to 150° West Longitude
Azimuth Range 113.1° to 171.3°
Corresponding Elevation Angles 5.0° / 23.5°
Antenna Centerline (AGL) 4.88 m / 16.0 ft
Antenna Information Receive Transmit
Manufacturer Andrew Corporation Andrew Corporation
Model ESA5-46A ESA5-46A
Gain / Diameter 43.7 dBi / 4.5 m 46.8 dBi / 4.5 m
3-dB / 15-dB Beamwidth 1.20° / 2.40° 1.00° / 2.00°

30K0G7W to 36M0G7W

Max Available RF Power (dBW/4 kHz) -2.7 -25.5
(dBW/MHz) 21.3 -1.5

Maximum EIRP (dBW/4 kHz) 44.1 21.3
(dBW/MHz) 68.1 45.3
(dBW) 52.9 60.8

Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20%
Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025%
Frequency Information Receive 4.0 GHz Transmit 6.1 GHz
Emission / Frequency Range (MHz) 30K0G7W - 36M0G7W / 3700.0 - 4200.0 30K0G7W - 36M0G7W / 5925.0 - 6425.0

Max Great Circle Coordination Distance 548.4 km / 340.7 mi 308.0 km / 191.3 mi
Precipitation Scatter Contour Radius 620.4 km / 385.5 mi 101.7 km / 63.2 mi

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 7 of 10

COMSEARCH
Earth Station Data Sheet
19700 Janelia Farm Boulevard, Ashburn, VA 20147
(703)726-5500 http://www.comsearch.com

Coordination Values EGEGIK, AK
Licensee Name Alascom Inc
Latitude (NAD 83) 58° 12' 50.6" N
Longitude (NAD 83) 157° 22' 20.4" W
Ground Elevation (AMSL) 24.38 m / 80.0 ft
Antenna Centerline (AGL) 4.88 m / 16.0 ft
Antenna Model Andrew Corporation ESA5-46A
Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz
Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20%
Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025%
Max Available RF Power -2.7 (dBW/4 kHz)

Receive 4.0 GHz Transmit 6.1 GHz
Horizon Antenna Horizon Coordination Horizon Coordination
Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km)
0 0.00 112.99 -10.00 285.28 -10.00 170.66
5 0.00 108.01 -10.00 285.28 -10.00 170.66
10 0.00 103.03 -10.00 285.28 -10.00 170.66
15 0.00 98.05 -10.00 285.28 -10.00 170.66
20 0.00 93.07 -10.00 285.28 -10.00 170.66
25 0.00 88.09 -10.00 285.28 -10.00 170.66
30 0.00 83.11 -10.00 285.28 -10.00 170.66
35 0.00 78.13 -10.00 285.28 -10.00 170.66
40 0.00 73.15 -10.00 285.28 -10.00 170.66
45 0.00 68.17 -10.00 285.28 -10.00 170.66
50 0.00 63.20 -10.00 285.28 -10.00 170.66
55 0.00 58.22 -10.00 285.28 -10.00 170.66
60 0.00 53.25 -10.00 285.28 -10.00 170.66
65 0.00 48.28 -10.00 285.28 -10.00 170.66
70 0.00 43.32 -8.92 292.27 -8.92 174.87
75 0.00 38.36 -7.60 301.02 -7.60 179.98
80 0.00 33.42 -6.10 311.31 -6.10 185.76
85 0.00 28.49 -4.37 324.20 -4.37 192.42
90 0.98 23.41 -2.24 267.42 -2.24 142.53
95 0.98 18.51 0.32 285.44 0.32 152.88
100 0.98 13.68 3.60 310.80 3.60 169.58
105 0.72 9.14 7.98 366.53 7.98 202.80
110 1.19 4.90 14.75 399.05 14.75 212.59
115 1.19 4.25 16.29 548.35 16.29 307.96
120 1.24 6.57 11.56 432.68 11.56 232.68
125 1.13 8.93 8.23 360.07 8.23 193.91
130 1.13 11.08 5.89 323.59 5.89 175.04
135 1.21 13.03 4.13 305.12 4.13 162.61
140 1.17 14.95 2.64 294.92 2.64 156.88
145 1.13 16.69 1.44 287.37 1.44 152.77
150 0.89 18.45 0.35 292.12 0.35 158.08
155 0.77 19.90 -0.47 294.16 -0.47 160.98
160 0.69 21.10 -1.11 295.19 -1.11 162.80
165 0.42 22.25 -1.68 315.06 -1.68 180.94
170 0.24 23.07 -2.08 335.13 -2.08 196.90
175 0.00 23.79 -2.41 338.47 -2.41 199.91
180 0.00 24.98 -2.94 334.57 -2.94 197.89

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 8 of 10

COMSEARCH
Earth Station Data Sheet
19700 Janelia Farm Boulevard, Ashburn, VA 20147
(703)726-5500 http://www.comsearch.com

Coordination Values EGEGIK, AK
Licensee Name Alascom Inc
Latitude (NAD 83) 58° 12' 50.6" N
Longitude (NAD 83) 157° 22' 20.4" W
Ground Elevation (AMSL) 24.38 m / 80.0 ft
Antenna Centerline (AGL) 4.88 m / 16.0 ft
Antenna Model Andrew Corporation ESA5-46A
Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz
Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20%
Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025%
Max Available RF Power -2.7 (dBW/4 kHz)

Receive 4.0 GHz Transmit 6.1 GHz
Horizon Antenna Horizon Coordination Horizon Coordination
Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km)
185 0.00 27.00 -3.78 328.40 -3.78 194.66
190 0.35 29.42 -4.72 301.83 -4.72 175.80
195 0.35 32.64 -5.84 294.04 -5.84 171.17
200 0.00 36.43 -7.04 304.84 -7.04 182.15
205 0.00 40.25 -8.12 297.53 -8.12 177.96
210 0.00 44.27 -9.15 290.73 -9.15 173.95
215 0.00 48.44 -10.00 285.28 -10.00 170.66
220 0.00 52.72 -10.00 285.28 -10.00 170.66
225 0.00 57.08 -10.00 285.28 -10.00 170.66
230 0.00 61.51 -10.00 285.28 -10.00 170.66
235 0.00 65.99 -10.00 285.28 -10.00 170.66
240 0.00 70.50 -10.00 285.28 -10.00 170.66
245 0.00 75.04 -10.00 285.28 -10.00 170.66
250 0.00 79.61 -10.00 285.28 -10.00 170.66
255 0.00 84.18 -10.00 285.28 -10.00 170.66
260 0.00 88.76 -10.00 285.28 -10.00 170.66
265 0.00 93.35 -10.00 285.28 -10.00 170.66
270 0.00 97.93 -10.00 285.28 -10.00 170.66
275 0.00 102.50 -10.00 285.28 -10.00 170.66
280 0.00 107.05 -10.00 285.28 -10.00 170.66
285 0.00 111.58 -10.00 285.28 -10.00 170.66
290 0.00 116.08 -10.00 285.28 -10.00 170.66
295 0.00 120.54 -10.00 285.28 -10.00 170.66
300 0.00 124.94 -10.00 285.28 -10.00 170.66
305 0.00 129.27 -10.00 285.28 -10.00 170.66
310 0.00 133.50 -10.00 285.28 -10.00 170.66
315 0.00 137.60 -10.00 285.28 -10.00 170.66
320 0.00 141.54 -10.00 285.28 -10.00 170.66
325 0.00 145.25 -10.00 285.28 -10.00 170.66
330 0.00 142.80 -10.00 285.28 -10.00 170.66
335 0.00 137.84 -10.00 285.28 -10.00 170.66
340 0.00 132.88 -10.00 285.28 -10.00 170.66
345 0.00 127.92 -10.00 285.28 -10.00 170.66
350 0.00 122.94 -10.00 285.28 -10.00 170.66
355 0.00 117.97 -10.00 285.28 -10.00 170.66

Frequency Coordination and Interference Analysis Report 06/22/2015 Page 9 of 10

Document Created: 2015-06-22 17:59:11
Document Modified: 2015-06-22 17:59:11

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