Attachment Exhibit 3

This document pretains to SES-MOD-20150818-00531 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2015081800531_1098867

Exhibit A Frequency Coordination Per 47 C.F.R. Ch. 1 §25.130(b), attached is a “Frequency Coordination And Interference Analysis Report” performed pursuant to 47 C.F.R. Ch. 1 §25.203(c).

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for GCI Communications Corporation POINT LAY, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 June 02, 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 06/02/2015 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 06/02/2015 Page 3 of 10

2. SUMMARY OF RESULTS There were no great circle interference cases identified during the interference study of the proposed earth station. No carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 06/02/2015 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. Coordination data for this earth station was sent to the below listed carriers with a letter dated 04/23/2015. Minor change notice sent 06/02/2015. Company Teck Alaska Incorporated Frequency Coordination and Interference Analysis Report 06/02/2015 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 06/02/2015 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 06/02/2015 Job Number: 150602COMSTC01 Administrative Information Call Sign E960401 Licensee Code P3203 Licensee Name GCI Communications Corporation Site Information POINT LAY, AK Latitude (NAD 83) 69° 44' 26.2" N Longitude (NAD 83) 163° 0' 44.5" W Climate Zone B Rain Zone 2 Ground Elevation (AMSL) 8.63 m / 28.3 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 116.8° W to 194° West Longitude Azimuth Range 132.0° to 212.6° Corresponding Elevation Angles 5.2° / 8.7° Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Information Receive - S40362 Transmit - S60362 Manufacturer SCIENTIFIC-ATLANTA, INC SCIENTIFIC-ATLANTA, INC Model 8136 8136 Gain / Diameter 41.8 dBi / 3.6 m 45.6 dBi / 3.6 m 3-dB / 15-dB Beamwidth 1.40° / 3.00° 0.90° / 1.70° 6K72G7W - 36M0G7W 6K72D7W - 36M0D7W Max Available RF Power (dBW/4 kHz) -2.7 -16.53 (dBW/MHz) 21.3 7.47 Maximum EIRP (dBW/4 kHz) 42.9 29.07 (dBW/MHz) 66.9 53.07 (dBW) 42.9 68.61 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) 6K72G7W - 36M0G7W / 3700.0 - 4200.0 6K72G7W - 36M0G7W / 5925.0 - 6425.0 6K72D7W - 36M0D7W / 3700.0 - 4200.0 6K72D7W - 36M0D7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 761.0 km / 472.8 mi 351.0 km / 218.0 mi Precipitation Scatter Contour Radius 615.6 km / 382.5 mi 101.5 km / 63.1 mi Frequency Coordination and Interference Analysis Report 06/02/2015 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 POINT LAY, AK Licensee Name GCI Communications Corporation Latitude (NAD 83) 69° 44' 26.2" N Longitude (NAD 83) 163° 0' 44.5" W Ground Elevation (AMSL) 8.63 m / 28.3 ft Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Model SCIENTIFIC-ATLANTA, INC 8136 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 0.00 131.75 -10.20 409.73 -10.40 198.50 5 0.00 126.79 -10.20 409.73 -10.40 198.50 10 0.00 121.82 -10.20 409.73 -10.40 198.50 15 0.00 116.85 -10.20 409.73 -10.40 198.50 20 0.00 111.87 -10.20 409.73 -10.40 198.50 25 0.00 106.89 -10.20 409.73 -10.40 198.50 30 0.00 101.92 -10.20 409.73 -10.40 198.50 35 0.00 96.94 -10.20 409.73 -10.40 198.50 40 0.00 91.96 -10.20 409.73 -10.40 198.50 45 0.00 86.98 -10.20 409.73 -10.40 198.50 50 0.00 82.00 -10.20 409.73 -10.40 198.50 55 0.00 77.02 -10.20 409.73 -10.40 198.50 60 0.00 72.04 -10.20 409.73 -10.40 198.50 65 0.00 67.07 -10.20 409.73 -10.40 198.50 70 0.00 62.09 -10.20 409.73 -10.40 198.50 75 0.00 57.12 -10.20 409.73 -10.40 198.50 80 0.00 52.15 -10.20 409.73 -10.40 198.50 85 0.00 47.19 -9.64 416.72 -9.84 201.70 90 0.00 42.23 -8.65 429.36 -8.85 207.44 95 0.00 37.28 -7.11 449.69 -7.31 216.57 100 0.00 32.34 -5.67 469.04 -5.87 225.44 105 0.00 27.43 -4.17 490.74 -4.37 234.93 110 0.00 22.54 -1.73 528.32 -1.93 251.04 115 0.00 17.72 1.17 576.26 0.97 269.68 120 0.00 13.03 3.77 622.58 4.57 297.85 125 0.00 8.69 7.80 700.16 7.60 324.18 130 0.00 5.56 10.68 761.01 10.48 350.95 135 0.00 5.81 10.18 750.18 9.98 346.06 140 0.00 6.99 7.82 700.50 7.62 324.34 145 0.00 8.06 7.80 700.16 7.60 324.18 150 0.00 9.00 7.80 700.12 7.60 324.16 155 0.00 9.82 6.98 683.57 6.78 316.81 160 0.00 10.50 6.30 670.04 6.10 310.82 165 0.00 11.04 5.76 659.53 5.56 306.18 170 0.00 11.43 5.37 652.03 5.17 302.88 175 0.00 11.67 5.13 647.53 4.93 300.90 180 0.00 11.75 5.05 646.02 4.85 300.23 185 0.00 11.67 5.13 647.50 4.93 300.88 Frequency Coordination and Interference Analysis Report 06/02/2015 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 POINT LAY, AK Licensee Name GCI Communications Corporation Latitude (NAD 83) 69° 44' 26.2" N Longitude (NAD 83) 163° 0' 44.5" W Ground Elevation (AMSL) 8.63 m / 28.3 ft Antenna Centerline (AGL) 4.57 m / 15.0 ft Antenna Model SCIENTIFIC-ATLANTA, INC 8136 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) 190 0.00 11.43 5.37 651.97 5.17 302.85 195 0.00 11.05 5.75 659.46 5.55 306.15 200 0.00 10.51 6.29 669.96 6.09 310.79 205 0.00 9.82 6.98 683.51 6.78 316.79 210 0.00 9.00 7.80 700.11 7.60 324.16 215 0.00 8.99 7.80 700.16 7.60 324.18 220 0.00 11.37 5.43 653.31 5.23 303.44 225 0.00 15.07 2.76 604.22 2.56 281.71 230 0.00 19.36 0.18 559.56 -0.02 262.59 235 0.00 23.92 -2.55 515.35 -2.75 245.52 240 0.00 28.62 -4.65 483.74 -4.85 231.88 245 0.00 33.40 -5.88 466.07 -6.08 224.13 250 0.00 38.23 -7.49 444.58 -7.69 214.29 255 0.00 43.09 -8.82 427.14 -9.02 206.43 260 0.00 47.98 -9.80 414.75 -10.00 200.80 265 0.00 52.88 -10.20 409.73 -10.40 198.50 270 0.00 57.79 -10.20 409.73 -10.40 198.50 275 0.00 62.72 -10.20 409.73 -10.40 198.50 280 0.00 67.65 -10.20 409.73 -10.40 198.50 285 0.00 72.58 -10.20 409.73 -10.40 198.50 290 0.00 77.52 -10.20 409.73 -10.40 198.50 295 0.00 82.46 -10.20 409.73 -10.40 198.50 300 0.00 87.41 -10.20 409.73 -10.40 198.50 305 0.00 92.35 -10.20 409.73 -10.40 198.50 310 0.00 97.29 -10.20 409.73 -10.40 198.50 315 0.00 102.23 -10.20 409.73 -10.40 198.50 320 0.00 107.17 -10.20 409.73 -10.40 198.50 325 0.00 112.11 -10.20 409.73 -10.40 198.50 330 0.00 117.04 -10.20 409.73 -10.40 198.50 335 0.00 121.96 -10.20 409.73 -10.40 198.50 340 0.00 126.88 -10.20 409.73 -10.40 198.50 345 0.00 131.78 -10.20 409.73 -10.40 198.50 350 0.00 136.67 -10.20 409.73 -10.40 198.50 355 0.00 136.71 -10.20 409.73 -10.40 198.50 Frequency Coordination and Interference Analysis Report 06/02/2015 Page 9 of 10

5. CERTIFICATION I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION, THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED WITH THIS APPLICATION, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY KNOWLEDGE AND BELIEF. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: June 02, 2015 Frequency Coordination and Interference Analysis Report 06/02/2015 Page 10 of 10


Document Created: 2015-06-03 10:28:19
Document Modified: 2015-06-03 10:28:19
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